CVE-2021-25219 (GCVE-0-2021-25219)
Vulnerability from cvelistv5 – Published: 2021-10-27 21:10 – Updated: 2024-09-16 17:33
VLAI
EPSS
VEX
Title
Lame cache can be abused to severely degrade resolver performance
Summary
In BIND 9.3.0 -> 9.11.35, 9.12.0 -> 9.16.21, and versions 9.9.3-S1 -> 9.11.35-S1 and 9.16.8-S1 -> 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.18 of the BIND 9.17 development branch, exploitation of broken authoritative servers using a flaw in response processing can cause degradation in BIND resolver performance. The way the lame cache is currently designed makes it possible for its internal data structures to grow almost infinitely, which may cause significant delays in client query processing.
Severity
5.3 (Medium)
CWE
- Authoritative-only BIND 9 servers are NOT vulnerable to this flaw. The purpose of a resolver's lame cache is to ensure that if an authoritative server responds to a resolver's query in a specific broken way, subsequent client queries for the same <QNAME, QTYPE> tuple do not trigger further queries to the same server for a configurable amount of time. The lame cache is enabled by setting the "lame-ttl" option in named.conf to a value greater than 0. That option is set to "lame-ttl 600;" in the default configuration, which means the lame cache is enabled by default. A successful attack exploiting this flaw causes a named resolver to spend most of its CPU time on managing and checking the lame cache. This results in client queries being responded to with large delays, and increased likelihood of DNS timeouts on client hosts. Affects BIND 9.3.0 -> 9.11.35, 9.12.0 -> 9.16.21, and versions 9.9.3-S1 -> 9.11.35-S1 and 9.16.8-S1 -> 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.18 of the BIND 9.17 development branch.
Assigner
References
10 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| ISC | BIND9 |
Affected:
Open Source Branches 9.3 through 9.11 9.3.0 through versions before 9.11.36
Affected: Open Source Branches 9.12 through 9.16 9.12.0 through versions before 9.16.22 Affected: Supported Preview Branches 9.9-S through 9.11-S 9.9.3-S1 through versions before 9.11.36-S1 Affected: Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.22-S1 Affected: Development Branch 9.17 9.17.0 through versions before 9.17.19 |
guessed |
Date Public
2021-10-27 00:00
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T19:56:11.060Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://kb.isc.org/v1/docs/cve-2021-25219"
},
{
"name": "DSA-4994",
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://www.debian.org/security/2021/dsa-4994"
},
{
"name": "[debian-lts-announce] 20211102 [SECURITY] [DLA 2807-1] bind9 security update",
"tags": [
"mailing-list",
"x_transferred"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00001.html"
},
{
"name": "FEDORA-2021-58e7b873b7",
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTKC4E3HUOLYN5IA4EBL4VAQSWG2ZVTX/"
},
{
"name": "FEDORA-2021-39b33260b8",
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YGV7SA27CTYLGFJSPUM3V36ZWK7WWDI4/"
},
{
"name": "FEDORA-2021-eb8dab50ba",
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EF4NAVRV4H3W4GA3LGGZYUKD3HSJBAVW/"
},
{
"tags": [
"x_transferred"
],
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"tags": [
"x_transferred"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
},
{
"tags": [
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20211118-0002/"
},
{
"name": "GLSA-202210-25",
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://security.gentoo.org/glsa/202210-25"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "BIND9",
"vendor": "ISC",
"versions": [
{
"status": "affected",
"version": "Open Source Branches 9.3 through 9.11 9.3.0 through versions before 9.11.36"
},
{
"status": "affected",
"version": "Open Source Branches 9.12 through 9.16 9.12.0 through versions before 9.16.22"
},
{
"status": "affected",
"version": "Supported Preview Branches 9.9-S through 9.11-S 9.9.3-S1 through versions before 9.11.36-S1"
},
{
"status": "affected",
"version": "Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.22-S1"
},
{
"status": "affected",
"version": "Development Branch 9.17 9.17.0 through versions before 9.17.19"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "ISC would like to thank Kishore Kumar Kothapalli of Infoblox for bringing this vulnerability to our attention."
}
],
"datePublic": "2021-10-27T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "In BIND 9.3.0 -\u003e 9.11.35, 9.12.0 -\u003e 9.16.21, and versions 9.9.3-S1 -\u003e 9.11.35-S1 and 9.16.8-S1 -\u003e 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -\u003e 9.17.18 of the BIND 9.17 development branch, exploitation of broken authoritative servers using a flaw in response processing can cause degradation in BIND resolver performance. The way the lame cache is currently designed makes it possible for its internal data structures to grow almost infinitely, which may cause significant delays in client query processing."
}
],
"exploits": [
{
"lang": "en",
"value": "We are not aware of any active exploits."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Authoritative-only BIND 9 servers are NOT vulnerable to this flaw. The purpose of a resolver\u0027s lame cache is to ensure that if an authoritative server responds to a resolver\u0027s query in a specific broken way, subsequent client queries for the same \u003cQNAME, QTYPE\u003e tuple do not trigger further queries to the same server for a configurable amount of time. The lame cache is enabled by setting the \"lame-ttl\" option in named.conf to a value greater than 0. That option is set to \"lame-ttl 600;\" in the default configuration, which means the lame cache is enabled by default. A successful attack exploiting this flaw causes a named resolver to spend most of its CPU time on managing and checking the lame cache. This results in client queries being responded to with large delays, and increased likelihood of DNS timeouts on client hosts. Affects BIND 9.3.0 -\u003e 9.11.35, 9.12.0 -\u003e 9.16.21, and versions 9.9.3-S1 -\u003e 9.11.35-S1 and 9.16.8-S1 -\u003e 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -\u003e 9.17.18 of the BIND 9.17 development branch.",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2022-10-31T00:00:00.000Z",
"orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
"shortName": "isc"
},
"references": [
{
"url": "https://kb.isc.org/v1/docs/cve-2021-25219"
},
{
"name": "DSA-4994",
"tags": [
"vendor-advisory"
],
"url": "https://www.debian.org/security/2021/dsa-4994"
},
{
"name": "[debian-lts-announce] 20211102 [SECURITY] [DLA 2807-1] bind9 security update",
"tags": [
"mailing-list"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00001.html"
},
{
"name": "FEDORA-2021-58e7b873b7",
"tags": [
"vendor-advisory"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTKC4E3HUOLYN5IA4EBL4VAQSWG2ZVTX/"
},
{
"name": "FEDORA-2021-39b33260b8",
"tags": [
"vendor-advisory"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YGV7SA27CTYLGFJSPUM3V36ZWK7WWDI4/"
},
{
"name": "FEDORA-2021-eb8dab50ba",
"tags": [
"vendor-advisory"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EF4NAVRV4H3W4GA3LGGZYUKD3HSJBAVW/"
},
{
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
},
{
"url": "https://security.netapp.com/advisory/ntap-20211118-0002/"
},
{
"name": "GLSA-202210-25",
"tags": [
"vendor-advisory"
],
"url": "https://security.gentoo.org/glsa/202210-25"
}
],
"solutions": [
{
"lang": "en",
"value": "Upgrade to the patched release most closely related to your current version of BIND: BIND 9.11.36, BIND 9.16.22, BIND 9.17.19, or for BIND Supported Preview Edition (a special feature preview branch of BIND provided to eligible ISC support customers): BIND 9.11.36-S1, BIND 9.16.22-S1."
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Lame cache can be abused to severely degrade resolver performance",
"workarounds": [
{
"lang": "en",
"value": "Setting \"lame-ttl 0;\" disables the lame cache and prevents the performance issue. Our research and testing indicate that in the current Internet there is almost no downside to disabling the lame cache."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
"assignerShortName": "isc",
"cveId": "CVE-2021-25219",
"datePublished": "2021-10-27T21:10:10.088Z",
"dateReserved": "2021-01-15T00:00:00.000Z",
"dateUpdated": "2024-09-16T17:33:38.865Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2021-25219",
"date": "2026-11-02",
"epss": "0.11158",
"percentile": "0.95948"
},
"fkie_nvd": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*",
"matchCriteriaId": "0889BB06-FFB2-4F61-B8AB-0AEAC4AD8029",
"versionEndExcluding": "9.11.36",
"versionStartIncluding": "9.3.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*",
"matchCriteriaId": "53C15722-9393-4195-A685-151D1777B245",
"versionEndExcluding": "9.16.22",
"versionStartIncluding": "9.12.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*",
"matchCriteriaId": "40CC1E3A-075D-437B-8685-AB07FCB336F6",
"versionEndExcluding": "9.17.19",
"versionStartIncluding": "9.17.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.9.3:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "40EE014B-0CD8-45F3-BEDB-AE6368A78B04",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.9.12:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "DAF8FA8C-0526-4389-AEC6-92AD62AA3929",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.9.13:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "1A9BA952-A5DF-4CBA-8928-0B373C013C32",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.10.5:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "CAD41122-C5D8-4256-8CB7-FF88DCD96A13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.10.7:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "6243685F-1E5B-4FF6-AE1B-44798032FBA6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.3:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "C2FE13E1-0646-46FC-875B-CB4C34E20101",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.5:s3:*:*:supported_preview:*:*:*",
"matchCriteriaId": "1AA16E51-819C-4A1B-B66E-1C60C1782C0D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.5:s5:*:*:supported_preview:*:*:*",
"matchCriteriaId": "91533F9F-C0E5-4E84-8A4C-F744F956BF97",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.5:s6:*:*:supported_preview:*:*:*",
"matchCriteriaId": "46E6A4BD-D69B-4A70-821D-5612DD1315EF",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.6:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "8AF9D390-0D5B-4963-A2D3-BF1E7CD95E9D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.7:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "AB2B92F1-6BA8-41CA-9000-E0633462CC28",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.8:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "02CA4635-7DFC-408E-A837-856E0F96CA1B",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.12:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "3CABCB08-B838-45F7-AA87-77C6B8767DD0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.21:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "5CC1F26C-4757-4C87-BD8B-2FA456A88C6F",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.27:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "582A4948-B64F-45D4-807A-846A85BB6B42",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.29:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "F22E7F6A-0714-480D-ACDF-5027FD6697B2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.35:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "255AEB06-F071-4433-93E5-9436086C1A6D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.16.8:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "288EAD80-574B-4839-9C2C-81D6D088A733",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.16.11:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "3595F024-F910-4356-8B5B-D478960FF574",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.16.13:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "94661BA2-27F8-4FFE-B844-9404F735579D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.16.21:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "751E37C2-8BFD-4306-95C1-8C01CE495FA4",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
"matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
"matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
"matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
"matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",
"matchCriteriaId": "80E516C0-98A4-4ADE-B69F-66A772E2BAAA",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "6770B6C3-732E-4E22-BF1C-2D2FD610061C",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*",
"matchCriteriaId": "9F9C8C20-42EB-4AB5-BD97-212DEB070C43",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "7FFF7106-ED78-49BA-9EC5-B889E3685D53",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*",
"matchCriteriaId": "E63D8B0F-006E-4801-BF9D-1C001BBFB4F9",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "56409CEC-5A1E-4450-AA42-641E459CC2AF",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*",
"matchCriteriaId": "B06F4839-D16A-4A61-9BB5-55B13F41E47F",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "108A2215-50FB-4074-94CF-C130FA14566D",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:*",
"matchCriteriaId": "7AFC73CE-ABB9-42D3-9A71-3F5BC5381E0E",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "32F0B6C0-F930-480D-962B-3F4EFDCC13C7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:*",
"matchCriteriaId": "803BC414-B250-4E3A-A478-A3881340D6B8",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "0FEB3337-BFDE-462A-908B-176F92053CEC",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:*",
"matchCriteriaId": "736AEAE9-782B-4F71-9893-DED53367E102",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "D0B4AD8A-F172-4558-AEC6-FF424BA2D912",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*",
"matchCriteriaId": "8497A4C9-8474-4A62-8331-3FE862ED4098",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "234DEFE0-5CE5-4B0A-96B8-5D227CB8ED31",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:*",
"matchCriteriaId": "CDDF61B7-EC5C-467C-B710-B89F502CD04F",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*",
"matchCriteriaId": "5C2089EE-5D7F-47EC-8EA5-0F69790564C4",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*",
"matchCriteriaId": "B0F46497-4AB0-49A7-9453-CC26837BF253",
"versionEndExcluding": "1.0.1.1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:*",
"matchCriteriaId": "DFC79B17-E9D2-44D5-93ED-2F959E7A3D43",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:*",
"matchCriteriaId": "AD04BEE5-E9A8-4584-A68C-0195CE9C402C",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*",
"matchCriteriaId": "D3E503FB-6279-4D4A-91D8-E237ECF9D2B0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In BIND 9.3.0 -\u003e 9.11.35, 9.12.0 -\u003e 9.16.21, and versions 9.9.3-S1 -\u003e 9.11.35-S1 and 9.16.8-S1 -\u003e 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -\u003e 9.17.18 of the BIND 9.17 development branch, exploitation of broken authoritative servers using a flaw in response processing can cause degradation in BIND resolver performance. The way the lame cache is currently designed makes it possible for its internal data structures to grow almost infinitely, which may cause significant delays in client query processing."
},
{
"lang": "es",
"value": "En BIND versiones 9.3.0 posteriores a 9.11.35, versiones 9.12.0 posteriores a 9.16.21, y en versiones 9.9.3-S1 posteriores a 9.11.35-S1 y versiones 9.16.8-S1 posteriores a 9.16.21-S1 de BIND Supported Preview Edition, as\u00ed como en las versiones 9.17.0 -\u0026gt; 9.17.18 de la rama de desarrollo de BIND 9.17, una explotaci\u00f3n de servidores autoritativos rotos usando un fallo en el procesamiento de respuestas puede causar una degradaci\u00f3n en el rendimiento del resolver BIND. La forma en que est\u00e1 dise\u00f1ada actualmente la cach\u00e9 de lame hace posible que sus estructuras de datos internas crezcan casi infinitamente, lo que puede causar retrasos significativos en el procesamiento de las consultas de los clientes"
}
],
"id": "CVE-2021-25219",
"lastModified": "2024-11-21T05:54:34.323",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4,
"source": "security-officer@isc.org",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2021-10-27T21:15:07.613",
"references": [
{
"source": "security-officer@isc.org",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
},
{
"source": "security-officer@isc.org",
"tags": [
"Vendor Advisory"
],
"url": "https://kb.isc.org/v1/docs/cve-2021-25219"
},
{
"source": "security-officer@isc.org",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00001.html"
},
{
"source": "security-officer@isc.org",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EF4NAVRV4H3W4GA3LGGZYUKD3HSJBAVW/"
},
{
"source": "security-officer@isc.org",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YGV7SA27CTYLGFJSPUM3V36ZWK7WWDI4/"
},
{
"source": "security-officer@isc.org",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTKC4E3HUOLYN5IA4EBL4VAQSWG2ZVTX/"
},
{
"source": "security-officer@isc.org",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/202210-25"
},
{
"source": "security-officer@isc.org",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20211118-0002/"
},
{
"source": "security-officer@isc.org",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2021/dsa-4994"
},
{
"source": "security-officer@isc.org",
"tags": [
"Third Party Advisory"
],
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://kb.isc.org/v1/docs/cve-2021-25219"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00001.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EF4NAVRV4H3W4GA3LGGZYUKD3HSJBAVW/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YGV7SA27CTYLGFJSPUM3V36ZWK7WWDI4/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTKC4E3HUOLYN5IA4EBL4VAQSWG2ZVTX/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/202210-25"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20211118-0002/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2021/dsa-4994"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
}
],
"sourceIdentifier": "security-officer@isc.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"nvd": {
"cve": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*",
"matchCriteriaId": "0889BB06-FFB2-4F61-B8AB-0AEAC4AD8029",
"versionEndExcluding": "9.11.36",
"versionStartIncluding": "9.3.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*",
"matchCriteriaId": "53C15722-9393-4195-A685-151D1777B245",
"versionEndExcluding": "9.16.22",
"versionStartIncluding": "9.12.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*",
"matchCriteriaId": "40CC1E3A-075D-437B-8685-AB07FCB336F6",
"versionEndExcluding": "9.17.19",
"versionStartIncluding": "9.17.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.9.3:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "40EE014B-0CD8-45F3-BEDB-AE6368A78B04",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.9.12:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "DAF8FA8C-0526-4389-AEC6-92AD62AA3929",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.9.13:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "1A9BA952-A5DF-4CBA-8928-0B373C013C32",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.10.5:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "CAD41122-C5D8-4256-8CB7-FF88DCD96A13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.10.7:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "6243685F-1E5B-4FF6-AE1B-44798032FBA6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.3:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "C2FE13E1-0646-46FC-875B-CB4C34E20101",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.5:s3:*:*:supported_preview:*:*:*",
"matchCriteriaId": "1AA16E51-819C-4A1B-B66E-1C60C1782C0D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.5:s5:*:*:supported_preview:*:*:*",
"matchCriteriaId": "91533F9F-C0E5-4E84-8A4C-F744F956BF97",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.5:s6:*:*:supported_preview:*:*:*",
"matchCriteriaId": "46E6A4BD-D69B-4A70-821D-5612DD1315EF",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.6:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "8AF9D390-0D5B-4963-A2D3-BF1E7CD95E9D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.7:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "AB2B92F1-6BA8-41CA-9000-E0633462CC28",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.8:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "02CA4635-7DFC-408E-A837-856E0F96CA1B",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.12:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "3CABCB08-B838-45F7-AA87-77C6B8767DD0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.21:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "5CC1F26C-4757-4C87-BD8B-2FA456A88C6F",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.27:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "582A4948-B64F-45D4-807A-846A85BB6B42",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.29:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "F22E7F6A-0714-480D-ACDF-5027FD6697B2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.11.35:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "255AEB06-F071-4433-93E5-9436086C1A6D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.16.8:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "288EAD80-574B-4839-9C2C-81D6D088A733",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.16.11:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "3595F024-F910-4356-8B5B-D478960FF574",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.16.13:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "94661BA2-27F8-4FFE-B844-9404F735579D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:isc:bind:9.16.21:s1:*:*:supported_preview:*:*:*",
"matchCriteriaId": "751E37C2-8BFD-4306-95C1-8C01CE495FA4",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
"matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
"matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
"matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
"matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",
"matchCriteriaId": "80E516C0-98A4-4ADE-B69F-66A772E2BAAA",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "6770B6C3-732E-4E22-BF1C-2D2FD610061C",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*",
"matchCriteriaId": "9F9C8C20-42EB-4AB5-BD97-212DEB070C43",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "7FFF7106-ED78-49BA-9EC5-B889E3685D53",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*",
"matchCriteriaId": "E63D8B0F-006E-4801-BF9D-1C001BBFB4F9",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "56409CEC-5A1E-4450-AA42-641E459CC2AF",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*",
"matchCriteriaId": "B06F4839-D16A-4A61-9BB5-55B13F41E47F",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "108A2215-50FB-4074-94CF-C130FA14566D",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:*",
"matchCriteriaId": "7AFC73CE-ABB9-42D3-9A71-3F5BC5381E0E",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "32F0B6C0-F930-480D-962B-3F4EFDCC13C7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:*",
"matchCriteriaId": "803BC414-B250-4E3A-A478-A3881340D6B8",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "0FEB3337-BFDE-462A-908B-176F92053CEC",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:*",
"matchCriteriaId": "736AEAE9-782B-4F71-9893-DED53367E102",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "D0B4AD8A-F172-4558-AEC6-FF424BA2D912",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*",
"matchCriteriaId": "8497A4C9-8474-4A62-8331-3FE862ED4098",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "234DEFE0-5CE5-4B0A-96B8-5D227CB8ED31",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:*",
"matchCriteriaId": "CDDF61B7-EC5C-467C-B710-B89F502CD04F",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*",
"matchCriteriaId": "5C2089EE-5D7F-47EC-8EA5-0F69790564C4",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*",
"matchCriteriaId": "B0F46497-4AB0-49A7-9453-CC26837BF253",
"versionEndExcluding": "1.0.1.1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:*",
"matchCriteriaId": "DFC79B17-E9D2-44D5-93ED-2F959E7A3D43",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:*",
"matchCriteriaId": "AD04BEE5-E9A8-4584-A68C-0195CE9C402C",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*",
"matchCriteriaId": "D3E503FB-6279-4D4A-91D8-E237ECF9D2B0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In BIND 9.3.0 -\u003e 9.11.35, 9.12.0 -\u003e 9.16.21, and versions 9.9.3-S1 -\u003e 9.11.35-S1 and 9.16.8-S1 -\u003e 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -\u003e 9.17.18 of the BIND 9.17 development branch, exploitation of broken authoritative servers using a flaw in response processing can cause degradation in BIND resolver performance. The way the lame cache is currently designed makes it possible for its internal data structures to grow almost infinitely, which may cause significant delays in client query processing."
},
{
"lang": "es",
"value": "En BIND versiones 9.3.0 posteriores a 9.11.35, versiones 9.12.0 posteriores a 9.16.21, y en versiones 9.9.3-S1 posteriores a 9.11.35-S1 y versiones 9.16.8-S1 posteriores a 9.16.21-S1 de BIND Supported Preview Edition, as\u00ed como en las versiones 9.17.0 -\u0026gt; 9.17.18 de la rama de desarrollo de BIND 9.17, una explotaci\u00f3n de servidores autoritativos rotos usando un fallo en el procesamiento de respuestas puede causar una degradaci\u00f3n en el rendimiento del resolver BIND. La forma en que est\u00e1 dise\u00f1ada actualmente la cach\u00e9 de lame hace posible que sus estructuras de datos internas crezcan casi infinitamente, lo que puede causar retrasos significativos en el procesamiento de las consultas de los clientes"
}
],
"id": "CVE-2021-25219",
"lastModified": "2024-11-21T05:54:34.323",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4,
"source": "security-officer@isc.org",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2021-10-27T21:15:07.613",
"references": [
{
"source": "security-officer@isc.org",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
},
{
"source": "security-officer@isc.org",
"tags": [
"Vendor Advisory"
],
"url": "https://kb.isc.org/v1/docs/cve-2021-25219"
},
{
"source": "security-officer@isc.org",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00001.html"
},
{
"source": "security-officer@isc.org",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EF4NAVRV4H3W4GA3LGGZYUKD3HSJBAVW/"
},
{
"source": "security-officer@isc.org",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YGV7SA27CTYLGFJSPUM3V36ZWK7WWDI4/"
},
{
"source": "security-officer@isc.org",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTKC4E3HUOLYN5IA4EBL4VAQSWG2ZVTX/"
},
{
"source": "security-officer@isc.org",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/202210-25"
},
{
"source": "security-officer@isc.org",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20211118-0002/"
},
{
"source": "security-officer@isc.org",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2021/dsa-4994"
},
{
"source": "security-officer@isc.org",
"tags": [
"Third Party Advisory"
],
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://kb.isc.org/v1/docs/cve-2021-25219"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00001.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EF4NAVRV4H3W4GA3LGGZYUKD3HSJBAVW/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YGV7SA27CTYLGFJSPUM3V36ZWK7WWDI4/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTKC4E3HUOLYN5IA4EBL4VAQSWG2ZVTX/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/202210-25"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20211118-0002/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2021/dsa-4994"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
}
],
"sourceIdentifier": "security-officer@isc.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2025-11-21T15:54:04+00:00",
"cve": "CVE-2021-25219",
"id": "CVE-2021-25219",
"initial_release_date": "2021-10-27T00:00:00+00:00",
"product_status:fixed": "242",
"product_status:known_affected": "24",
"product_status:known_not_affected": "11",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "bind: Lame cache can be abused to severely degrade resolver performance",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-25219.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-10-19T00:01:27Z",
"cve": "CVE-2021-25219",
"id": "CVE-2021-25219",
"initial_release_date": "2023-02-15T03:45:10Z",
"product_status:known_affected": "195",
"product_status:known_not_affected": "623",
"product_status:recommended": "879",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2021-25219",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2023/cve-2021-25219.json",
"version": "43"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
Loading timeline…
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.