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
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 83%
Affected Products (NVD)
VendorProductVersion
thekelleysdnsmasq
2.86
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
dnsmasq
bookworm
unimportant
bullseye
unimportant
sid
unimportant
trixie
unimportant
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
dnsmasq
bionic
not-affected
focal
not-affected
hirsute
ignored
impish
not-affected
jammy
not-affected
trusty
not-affected
xenial
not-affected
Azure Linux logo
Azure Linux Releases
Azure Package
Release
dnsmasq
CBL-Mariner 2.0
0:2.89-2.cm2
fixed