DescriptionInteger 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severityhigh

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
dnsmasq (PTS)stretch2.76-5+deb9u2fixed
stretch (security)2.76-5+deb9u3fixed
buster, buster (security)2.80-1+deb10u1fixed
bullseye, sid2.85-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
dnsmasqsourcewheezy(not affected)
dnsmasqsourcejessie(not affected)


[jessie] - dnsmasq <not-affected> (Vulnerable code introduced later)
[wheezy] - dnsmasq <not-affected> (Vulnerable code introduced later);a=commit;h=897c113fda0886a28a986cc6ba17bb93bd6cb1c7

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