CVE-2020-8616 (GCVE-0-2020-8616)
Vulnerability from cvelistv5
Published
2020-05-19 14:05
Modified
2024-09-16 23:55
Severity ?
8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE
  • In order for a server performing recursion to locate records in the DNS graph it must be capable of processing referrals, such as those received when it attempts to query an authoritative server for a record which is delegated elsewhere. In its original design BIND (as well as other nameservers) does not sufficiently limit the number of fetches which may be performed while processing a referral response. BIND 9.0.0 -> 9.11.18, 9.12.0 -> 9.12.4-P2, 9.14.0 -> 9.14.11, 9.16.0 -> 9.16.2, and releases 9.17.0 -> 9.17.1 of the 9.17 experimental development branch. All releases in the obsolete 9.13 and 9.15 development branches. All releases of BIND Supported Preview Edition from 9.9.3-S1 -> 9.11.18-S1.
Summary
A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals, cause a recursing server to issue a very large number of fetches in an attempt to process the referral. This has at least two potential effects: The performance of the recursing server can potentially be degraded by the additional work required to perform these fetches, and The attacker can exploit this behavior to use the recursing server as a reflector in a reflection attack with a high amplification factor.
References
security-officer@isc.org http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html
security-officer@isc.org http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html
security-officer@isc.org http://www.nxnsattack.com Exploit, Third Party Advisory
security-officer@isc.org http://www.openwall.com/lists/oss-security/2020/05/19/4 Mailing List, Patch, Third Party Advisory
security-officer@isc.org https://kb.isc.org/docs/cve-2020-8616 Patch, Vendor Advisory
security-officer@isc.org https://lists.debian.org/debian-lts-announce/2020/05/msg00031.html
security-officer@isc.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKJXVBOKZ36ER3EUCR7VRB7WGHIIMPNJ/
security-officer@isc.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WOGCJS2XQ3SQNF4W6GLZ73LWZJ6ZZWZI/
security-officer@isc.org https://security.netapp.com/advisory/ntap-20200522-0002/
security-officer@isc.org https://usn.ubuntu.com/4365-1/
security-officer@isc.org https://usn.ubuntu.com/4365-2/
security-officer@isc.org https://www.debian.org/security/2020/dsa-4689 Third Party Advisory
security-officer@isc.org https://www.synology.com/security/advisory/Synology_SA_20_12
af854a3a-2127-422b-91ae-364da2661108 http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html
af854a3a-2127-422b-91ae-364da2661108 http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html
af854a3a-2127-422b-91ae-364da2661108 http://www.nxnsattack.com Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2020/05/19/4 Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://kb.isc.org/docs/cve-2020-8616 Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 https://lists.debian.org/debian-lts-announce/2020/05/msg00031.html
af854a3a-2127-422b-91ae-364da2661108 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKJXVBOKZ36ER3EUCR7VRB7WGHIIMPNJ/
af854a3a-2127-422b-91ae-364da2661108 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WOGCJS2XQ3SQNF4W6GLZ73LWZJ6ZZWZI/
af854a3a-2127-422b-91ae-364da2661108 https://security.netapp.com/advisory/ntap-20200522-0002/
af854a3a-2127-422b-91ae-364da2661108 https://usn.ubuntu.com/4365-1/
af854a3a-2127-422b-91ae-364da2661108 https://usn.ubuntu.com/4365-2/
af854a3a-2127-422b-91ae-364da2661108 https://www.debian.org/security/2020/dsa-4689 Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 https://www.synology.com/security/advisory/Synology_SA_20_12
Impacted products
Vendor Product Version
ISC BIND9 Version: 9.0.0 -> 9.11.18, 9.12.0 -> 9.12.4-P2, 9.14.0 -> 9.14.11, 9.16.0 -> 9.16.2, and releases 9.17.0 -> 9.17.1 of the 9.17 experimental development branch. All releases in the obsolete 9.13 and 9.15 development branches. All releases of BIND Supported Preview Edition from 9.9.3-S1 -> 9.11.18-S1
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This has at least two potential effects: The performance of the recursing server can potentially be degraded by the additional work required to perform these fetches, and The attacker can exploit this behavior to use the recursing server as a reflector in a reflection attack with a high amplification factor.\"},{\"lang\":\"es\",\"value\":\"Un actor malicioso que explota intencionalmente esta falta de limitaci\u00f3n efectiva en el n\u00famero de recuperaciones realizadas cuando se procesan referencias puede, mediante el uso de referencias especialmente dise\u00f1adas, causar que un servidor recurrente emita una gran cantidad de recuperaciones en un intento de procesar la referencia. Esto tiene al menos dos efectos potenciales: el rendimiento del servidor recurrente puede estar potencialmente afectado por el trabajo adicional requerido para realizar estas recuperaciones, y el atacante puede explotar este comportamiento para utilizar el servidor recurrente como un reflector en un ataque de reflexi\u00f3n con un alto factor de amplificaci\u00f3n\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-officer@isc.org\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H\",\"baseScore\":8.6,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":4.0},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H\",\"baseScore\":8.6,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":4.0}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:N/I:N/A:P\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-400\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.0.0\",\"versionEndIncluding\":\"9.11.18\",\"matchCriteriaId\":\"D09867AC-12F6-49C8-B399-0BA8B027B036\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.12.0\",\"versionEndIncluding\":\"9.12.4\",\"matchCriteriaId\":\"9C499955-0D38-4828-B94F-9BFE2719246B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.13.0\",\"versionEndIncluding\":\"9.13.7\",\"matchCriteriaId\":\"EA8EE96D-C27B-4995-BFB2-B4AC55ACAE8A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.14.0\",\"versionEndIncluding\":\"9.14.11\",\"matchCriteriaId\":\"3296874E-8628-4D69-B788-6CC51296A522\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.15.0\",\"versionEndIncluding\":\"9.15.6\",\"matchCriteriaId\":\"EEC8D4F0-B8E2-47B0-8E13-EE3FB4E43C01\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.16.0\",\"versionEndIncluding\":\"9.16.2\",\"matchCriteriaId\":\"12DD0D57-81E0-40BC-8047-E41892261E39\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.17.0\",\"versionEndIncluding\":\"9.17.1\",\"matchCriteriaId\":\"96A5AA10-99B2-4784-A628-33E5CC697A30\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:bind:9.12.4:p1:*:*:*:*:*:*\",\"matchCriteriaId\":\"E121D018-42B7-467E-9481-EDA4021401AF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:bind:9.12.4:p2:*:*:*:*:*:*\",\"matchCriteriaId\":\"343890F9-D6B4-433C-9131-9526DBB75749\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"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:9.10.5: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:9.11.6: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\":\"02CA46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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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