Vulnerability Monitor

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CVE-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 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge.

Published

2022-01-01T00:15:08.637

Last Modified

2024-11-21T06:33:21.273

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-787

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	thekelleys	dnsmasq	2.86	Yes

References

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35861 Exploit, Issue Tracking, Third Party Advisory ([email protected])
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-931.yaml Third Party Advisory ([email protected])
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html Mailing List, Third Party Advisory ([email protected])
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html Mailing List, Third Party Advisory ([email protected])
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35861 Exploit, Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-931.yaml Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)