CVE-2021-45955

Dnsmasq 2.86 has a heap-based buffer overflow in resize_packet (called from FuzzResizePacket and fuzz_rfc1035.c) because of the lack of a proper bounds check upon pseudo header re-insertion. 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." However, a contributor states that a security patch (mentioned in 016162.html) is needed

Score

CVSS 3.1 9.8 Critical

Status

Modified - cve@mitre.org

Published

2022-01-01

Last modified

2024-08-04

Weaknesses

CWE-787

Affected products

• Dnsmasq (Thekelleys)

References

• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35898
• https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-932.yaml
• https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html
• https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html