CVE-2021-45954
published 2022-01-01CVE-2021-45954: Dnsmasq 2.86 has a heap-based buffer overflow in extract_name (called from answer_auth and FuzzAuth). NOTE: the vendor's position is that CVE-2021-45951…
PriorityP342critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
2.59%
83.3th percentile
Dnsmasq 2.86 has a heap-based buffer overflow in extract_name (called from answer_auth and FuzzAuth). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| msrc | cbl2_dnsmasq_2.86-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
| thekelleys | dnsmasq | — | — |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
vendor_msrc9.8CRITICAL
vendor_redhat9.8CRITICAL
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Red Hat
dnsmasq: a heap-based buffer overflow in extract_name
vendor_redhat·2022-01-01·CVSS 9.8
CVE-2021-45954 [CRITICAL] CWE-787 dnsmasq: a heap-based buffer overflow in extract_name
dnsmasq: a heap-based buffer overflow in extract_name
Dnsmasq 2.86 has a heap-based buffer overflow in extract_name (called from answer_auth and FuzzAuth). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge.
Statement: Red Hat Product Security does not consider this to be a vulnerability.
Package: dnsmasq (Red Hat Enterprise Linux 6) - Not affected
Package: dnsmasq (Red Hat Enterprise Linux 7) - Not affected
Package: dnsmasq (Red Hat Enterprise Linux 8) - Not affected
Package: dnsmasq (Red Hat Enterprise Linux 9) - Not affected
Package: dnsmasq (Red Hat OpenStack Platform 13 (Queens)) - Not affected
Microsoft
Dnsmasq 2.86 has a heap-based buffer overflow in extract_name (called from answer_auth and FuzzAuth). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real v
vendor_msrc·2021-12-14·CVSS 9.8
CVE-2021-45954 [CRITICAL] CWE-787 Dnsmasq 2.86 has a heap-based buffer overflow in extract_name (called from answer_auth and FuzzAuth). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real v
Dnsmasq 2.86 has a heap-based buffer overflow in extract_name (called from answer_auth and FuzzAuth). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities to the best of our knowledge.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additiona
GHSA
GHSA-m967-87xc-9h3f: Dnsmasq 2
ghsa_unreviewed·2022-01-02
CVE-2021-45954 [CRITICAL] CWE-787 GHSA-m967-87xc-9h3f: Dnsmasq 2
Dnsmasq 2.86 has a heap-based buffer overflow in extract_name (called from answer_auth and FuzzAuth).
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35861https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-931.yamlhttps://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.htmlhttps://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.htmlhttps://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35861https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-931.yamlhttps://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.htmlhttps://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html
2022-01-01
Published