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(CVE-2017-13704)
Vulnerability from cleanstart – Published: 2026-09-04 00:59 – Updated: 2026-09-18 11:59 – Source website
Withdrawn 2026-09-18
VLAI
Summary
dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-...
Details
Multiple security vulnerabilities affect the dnsmasq package. dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS. See references for individual vulnerability details.
Severity
9.8 (Critical)
References
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"id": "CLEANSTART-2026-KY78316",
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"url": "https://osv.dev/vulnerability/CVE-2017-14491"
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{
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"url": "https://osv.dev/vulnerability/CVE-2019-14834"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2020-25681"
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"url": "https://osv.dev/vulnerability/CVE-2022-0934"
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CVE-2017-13704 (GCVE-0-2017-13704)
Vulnerability from cvelistv5 – Published: 2017-10-02 21:00 – Updated: 2024-08-05 19:05
VLAI
EPSS
VEX
Summary
In dnsmasq before 2.78, if the DNS packet size does not match the expected size, the size parameter in a memset call gets a negative value. As it is an unsigned value, memset ends up writing up to 0xffffffff zero's (0xffffffffffffffff in 64 bit platforms), making dnsmasq crash.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
12 references
| URL | Tags |
|---|---|
| http://www.securitytracker.com/id/1039474 | vdb-entryx_refsource_SECTRACK |
| https://www.synology.com/support/security/Synolog… | x_refsource_CONFIRM |
| https://access.redhat.com/security/vulnerabilitie… | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/101085 | vdb-entryx_refsource_BID |
| http://www.securityfocus.com/bid/101977 | vdb-entryx_refsource_BID |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://www.mail-archive.com/dnsmasq-discuss%40li… | mailing-listx_refsource_MLIST |
| http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3B… | x_refsource_CONFIRM |
| http://thekelleys.org.uk/dnsmasq/CHANGELOG | x_refsource_CONFIRM |
| https://security.googleblog.com/2017/10/behind-ma… | x_refsource_MISC |
| https://www.mail-archive.com/dnsmasq-discuss%40li… | mailing-listx_refsource_MLIST |
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_CONFIRM |
Date Public
2017-09-06 00:00
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CVE-2017-14491 (GCVE-0-2017-14491)
Vulnerability from cvelistv5 – Published: 2017-10-02 21:00 – Updated: 2024-08-05 19:27
VLAI
EPSS
VEX
Summary
Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a crafted DNS response.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
40 references
| URL | Tags |
|---|---|
| http://www.securitytracker.com/id/1039474 | vdb-entryx_refsource_SECTRACK |
| https://www.synology.com/support/security/Synolog… | x_refsource_CONFIRM |
| http://www.debian.org/security/2017/dsa-3989 | vendor-advisoryx_refsource_DEBIAN |
| https://access.redhat.com/security/vulnerabilitie… | x_refsource_CONFIRM |
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| https://www.kb.cert.org/vuls/id/973527 | third-party-advisoryx_refsource_CERT-VN |
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| https://access.redhat.com/errata/RHSA-2017:2836 | vendor-advisoryx_refsource_REDHAT |
| http://nvidia.custhelp.com/app/answers/detail/a_id/4561 | x_refsource_CONFIRM |
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| https://access.redhat.com/errata/RHSA-2017:2837 | vendor-advisoryx_refsource_REDHAT |
| https://www.exploit-db.com/exploits/42941/ | exploitx_refsource_EXPLOIT-DB |
| http://thekelleys.org.uk/dnsmasq/CHANGELOG | x_refsource_CONFIRM |
| https://access.redhat.com/errata/RHSA-2017:2841 | vendor-advisoryx_refsource_REDHAT |
| http://nvidia.custhelp.com/app/answers/detail/a_id/4560 | x_refsource_CONFIRM |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
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| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_CONFIRM |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| http://www.ubuntu.com/usn/USN-3430-3 | vendor-advisoryx_refsource_UBUNTU |
| http://packetstormsecurity.com/files/144480/Dnsma… | x_refsource_MISC |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://www.broadcom.com/support/fibre-channel-ne… | x_refsource_CONFIRM |
| http://www.huawei.com/en/psirt/security-advisorie… | x_refsource_CONFIRM |
| https://www.broadcom.com/support/fibre-channel-ne… | x_refsource_CONFIRM |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
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| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://www.debian.org/security/2017/dsa-3989 | vendor-advisoryx_refsource_DEBIAN |
| https://www.arista.com/en/support/advisories-noti… | x_refsource_MISC |
Date Public
2017-10-02 00:00
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CVE-2017-14492 (GCVE-0-2017-14492)
Vulnerability from cvelistv5 – Published: 2017-10-02 21:00 – Updated: 2024-08-05 19:27
VLAI
EPSS
VEX
Summary
Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a crafted IPv6 router advertisement request.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
20 references
| URL | Tags |
|---|---|
| http://www.securitytracker.com/id/1039474 | vdb-entryx_refsource_SECTRACK |
| https://www.synology.com/support/security/Synolog… | x_refsource_CONFIRM |
| http://www.debian.org/security/2017/dsa-3989 | vendor-advisoryx_refsource_DEBIAN |
| https://access.redhat.com/security/vulnerabilitie… | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/101085 | vdb-entryx_refsource_BID |
| http://www.ubuntu.com/usn/USN-3430-1 | vendor-advisoryx_refsource_UBUNTU |
| https://www.kb.cert.org/vuls/id/973527 | third-party-advisoryx_refsource_CERT-VN |
| https://security.gentoo.org/glsa/201710-27 | vendor-advisoryx_refsource_GENTOO |
| http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3B… | x_refsource_CONFIRM |
| http://www.ubuntu.com/usn/USN-3430-2 | vendor-advisoryx_refsource_UBUNTU |
| https://www.mail-archive.com/dnsmasq-discuss%40li… | mailing-listx_refsource_MLIST |
| https://www.exploit-db.com/exploits/42942/ | exploitx_refsource_EXPLOIT-DB |
| https://access.redhat.com/errata/RHSA-2017:2836 | vendor-advisoryx_refsource_REDHAT |
| http://nvidia.custhelp.com/app/answers/detail/a_id/4561 | x_refsource_CONFIRM |
| http://www.arubanetworks.com/assets/alert/ARUBA-P… | x_refsource_CONFIRM |
| https://access.redhat.com/errata/RHSA-2017:2837 | vendor-advisoryx_refsource_REDHAT |
| http://thekelleys.org.uk/dnsmasq/CHANGELOG | x_refsource_CONFIRM |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://security.googleblog.com/2017/10/behind-ma… | x_refsource_MISC |
| https://www.mail-archive.com/dnsmasq-discuss%40li… | mailing-listx_refsource_MLIST |
Date Public
2017-10-02 00:00
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CVE-2017-14493 (GCVE-0-2017-14493)
Vulnerability from cvelistv5 – Published: 2017-10-02 21:00 – Updated: 2024-08-05 19:27
VLAI
EPSS
VEX
Summary
Stack-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a crafted DHCPv6 request.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
20 references
| URL | Tags |
|---|---|
| http://www.securitytracker.com/id/1039474 | vdb-entryx_refsource_SECTRACK |
| https://www.synology.com/support/security/Synolog… | x_refsource_CONFIRM |
| http://www.debian.org/security/2017/dsa-3989 | vendor-advisoryx_refsource_DEBIAN |
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| https://access.redhat.com/security/vulnerabilitie… | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/101085 | vdb-entryx_refsource_BID |
| https://www.exploit-db.com/exploits/42943/ | exploitx_refsource_EXPLOIT-DB |
| http://www.ubuntu.com/usn/USN-3430-1 | vendor-advisoryx_refsource_UBUNTU |
| https://www.kb.cert.org/vuls/id/973527 | third-party-advisoryx_refsource_CERT-VN |
| https://security.gentoo.org/glsa/201710-27 | vendor-advisoryx_refsource_GENTOO |
| http://www.ubuntu.com/usn/USN-3430-2 | vendor-advisoryx_refsource_UBUNTU |
| https://www.mail-archive.com/dnsmasq-discuss%40li… | mailing-listx_refsource_MLIST |
| https://access.redhat.com/errata/RHSA-2017:2836 | vendor-advisoryx_refsource_REDHAT |
| http://nvidia.custhelp.com/app/answers/detail/a_id/4561 | x_refsource_CONFIRM |
| http://www.arubanetworks.com/assets/alert/ARUBA-P… | x_refsource_CONFIRM |
| https://access.redhat.com/errata/RHSA-2017:2837 | vendor-advisoryx_refsource_REDHAT |
| http://thekelleys.org.uk/dnsmasq/CHANGELOG | x_refsource_CONFIRM |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://security.googleblog.com/2017/10/behind-ma… | x_refsource_MISC |
| https://www.mail-archive.com/dnsmasq-discuss%40li… | mailing-listx_refsource_MLIST |
Date Public
2017-10-02 00:00
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CVE-2017-14494 (GCVE-0-2017-14494)
Vulnerability from cvelistv5 – Published: 2017-10-02 21:00 – Updated: 2024-08-05 19:27
VLAI
EPSS
VEX
Summary
dnsmasq before 2.78, when configured as a relay, allows remote attackers to obtain sensitive memory information via vectors involving handling DHCPv6 forwarded requests.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
20 references
| URL | Tags |
|---|---|
| http://www.securitytracker.com/id/1039474 | vdb-entryx_refsource_SECTRACK |
| https://www.synology.com/support/security/Synolog… | x_refsource_CONFIRM |
| http://www.debian.org/security/2017/dsa-3989 | vendor-advisoryx_refsource_DEBIAN |
| https://access.redhat.com/security/vulnerabilitie… | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/101085 | vdb-entryx_refsource_BID |
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CVE-2017-14495 (GCVE-0-2017-14495)
Vulnerability from cvelistv5 – Published: 2017-10-02 21:00 – Updated: 2024-08-05 19:27
VLAI
EPSS
VEX
Summary
Memory leak in dnsmasq before 2.78, when the --add-mac, --add-cpe-id or --add-subnet option is specified, allows remote attackers to cause a denial of service (memory consumption) via vectors involving DNS response creation.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
21 references
| URL | Tags |
|---|---|
| http://www.securitytracker.com/id/1039474 | vdb-entryx_refsource_SECTRACK |
| https://www.synology.com/support/security/Synolog… | x_refsource_CONFIRM |
| http://www.debian.org/security/2017/dsa-3989 | vendor-advisoryx_refsource_DEBIAN |
| https://access.redhat.com/security/vulnerabilitie… | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/101085 | vdb-entryx_refsource_BID |
| http://www.ubuntu.com/usn/USN-3430-1 | vendor-advisoryx_refsource_UBUNTU |
| http://www.securityfocus.com/bid/101977 | vdb-entryx_refsource_BID |
| https://www.kb.cert.org/vuls/id/973527 | third-party-advisoryx_refsource_CERT-VN |
| https://security.gentoo.org/glsa/201710-27 | vendor-advisoryx_refsource_GENTOO |
| http://www.ubuntu.com/usn/USN-3430-2 | vendor-advisoryx_refsource_UBUNTU |
| https://www.mail-archive.com/dnsmasq-discuss%40li… | mailing-listx_refsource_MLIST |
| https://access.redhat.com/errata/RHSA-2017:2836 | vendor-advisoryx_refsource_REDHAT |
| http://nvidia.custhelp.com/app/answers/detail/a_id/4561 | x_refsource_CONFIRM |
| http://www.arubanetworks.com/assets/alert/ARUBA-P… | x_refsource_CONFIRM |
| http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3B… | x_refsource_CONFIRM |
| https://www.exploit-db.com/exploits/42945/ | exploitx_refsource_EXPLOIT-DB |
| http://thekelleys.org.uk/dnsmasq/CHANGELOG | x_refsource_CONFIRM |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://security.googleblog.com/2017/10/behind-ma… | x_refsource_MISC |
| https://www.mail-archive.com/dnsmasq-discuss%40li… | mailing-listx_refsource_MLIST |
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_CONFIRM |
Date Public
2017-10-02 00:00
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CVE-2017-14496 (GCVE-0-2017-14496)
Vulnerability from cvelistv5 – Published: 2017-10-02 21:00 – Updated: 2024-08-05 19:27
VLAI
EPSS
VEX
Summary
Integer underflow in the add_pseudoheader function in dnsmasq before 2.78 , when the --add-mac, --add-cpe-id or --add-subnet option is specified, allows remote attackers to cause a denial of service via a crafted DNS request.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
22 references
| URL | Tags |
|---|---|
| http://www.securitytracker.com/id/1039474 | vdb-entryx_refsource_SECTRACK |
| https://www.synology.com/support/security/Synolog… | x_refsource_CONFIRM |
| http://www.debian.org/security/2017/dsa-3989 | vendor-advisoryx_refsource_DEBIAN |
| https://access.redhat.com/security/vulnerabilitie… | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/101085 | vdb-entryx_refsource_BID |
| http://www.ubuntu.com/usn/USN-3430-1 | vendor-advisoryx_refsource_UBUNTU |
| http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3B… | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/101977 | vdb-entryx_refsource_BID |
| https://www.kb.cert.org/vuls/id/973527 | third-party-advisoryx_refsource_CERT-VN |
| https://security.gentoo.org/glsa/201710-27 | vendor-advisoryx_refsource_GENTOO |
| http://www.ubuntu.com/usn/USN-3430-2 | vendor-advisoryx_refsource_UBUNTU |
| https://www.mail-archive.com/dnsmasq-discuss%40li… | mailing-listx_refsource_MLIST |
| https://source.android.com/security/bulletin/2017-10-01 | x_refsource_CONFIRM |
| https://www.exploit-db.com/exploits/42946/ | exploitx_refsource_EXPLOIT-DB |
| https://access.redhat.com/errata/RHSA-2017:2836 | vendor-advisoryx_refsource_REDHAT |
| http://nvidia.custhelp.com/app/answers/detail/a_id/4561 | x_refsource_CONFIRM |
| http://www.arubanetworks.com/assets/alert/ARUBA-P… | x_refsource_CONFIRM |
| http://thekelleys.org.uk/dnsmasq/CHANGELOG | x_refsource_CONFIRM |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://security.googleblog.com/2017/10/behind-ma… | x_refsource_MISC |
| https://www.mail-archive.com/dnsmasq-discuss%40li… | mailing-listx_refsource_MLIST |
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_CONFIRM |
Date Public
2017-10-02 00:00
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CVE-2017-15107 (GCVE-0-2017-15107)
Vulnerability from cvelistv5 – Published: 2018-01-23 16:00 – Updated: 2024-08-05 19:50
VLAI
EPSS
VEX
Summary
A vulnerability was found in the implementation of DNSSEC in Dnsmasq up to and including 2.78. Wildcard synthesized NSEC records could be improperly interpreted to prove the non-existence of hostnames that actually exist.
Severity
No CVSS data available.
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| http://lists.thekelleys.org.uk/pipermail/dnsmasq-… | mailing-listx_refsource_MLIST |
| http://www.securityfocus.com/bid/102812 | vdb-entryx_refsource_BID |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Simon Kelley | dnsmasq |
Affected:
up to and including 2.78
|
Date Public
2018-01-19 00:00
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CVE-2019-14834 (GCVE-0-2019-14834)
Vulnerability from cvelistv5 – Published: 2020-01-07 16:30 – Updated: 2024-08-05 00:26
VLAI
EPSS
VEX
Summary
A vulnerability was found in dnsmasq before version 2.81, where the memory leak allows remote attackers to cause a denial of service (memory consumption) via vectors involving DHCP response creation.
Severity
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
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| http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3B… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The Dnsmasq Project | dnsmasq |
Affected:
before 2.81
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CVE-2020-25681 (GCVE-0-2020-25681)
Vulnerability from cvelistv5 – Published: 2021-01-20 16:36 – Updated: 2025-11-04 19:12
VLAI
EPSS
VEX
Summary
A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in the way RRSets are sorted before validating with DNSSEC data. An attacker on the network, who can forge DNS replies such as that they are accepted as valid, could use this flaw to cause a buffer overflow with arbitrary data in a heap memory segment, possibly executing code on the machine. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Severity
No CVSS data available.
CWE
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://www.jsof-tech.com/disclosures/dnspooq/ | x_refsource_MISC |
| https://bugzilla.redhat.com/show_bug.cgi?id=1881875 | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://security.gentoo.org/glsa/202101-17 | vendor-advisoryx_refsource_GENTOO |
| https://www.debian.org/security/2021/dsa-4844 | vendor-advisoryx_refsource_DEBIAN |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://www.kb.cert.org/vuls/id/434904 |
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"x_refsource_FEDORA"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/"
},
{
"name": "[debian-lts-announce] 20210322 [SECURITY] [DLA 2604-1] dnsmasq security update",
"tags": [
"mailing-list",
"x_refsource_MLIST"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00027.html"
}
],
"x_legacyV4Record": {
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"ASSIGNER": "secalert@redhat.com",
"ID": "CVE-2020-25681",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "dnsmasq",
"version": {
"version_data": [
{
"version_value": "dnsmasq 2.83"
}
]
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}
]
},
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},
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"value": "A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in the way RRSets are sorted before validating with DNSSEC data. An attacker on the network, who can forge DNS replies such as that they are accepted as valid, could use this flaw to cause a buffer overflow with arbitrary data in a heap memory segment, possibly executing code on the machine. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability."
}
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"url": "https://www.jsof-tech.com/disclosures/dnspooq/"
},
{
"name": "https://bugzilla.redhat.com/show_bug.cgi?id=1881875",
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"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/"
},
{
"name": "GLSA-202101-17",
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"url": "https://security.gentoo.org/glsa/202101-17"
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{
"name": "DSA-4844",
"refsource": "DEBIAN",
"url": "https://www.debian.org/security/2021/dsa-4844"
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}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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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.
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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.
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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.
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