CVE-2020-13950

NameCVE-2020-13950
DescriptionApache HTTP Server versions 2.4.41 to 2.4.46 mod_proxy_http can be made to crash (NULL pointer dereference) with specially crafted requests using both Content-Length and Transfer-Encoding headers, leading to a Denial of Service
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
apache2 (PTS)bullseye2.4.62-1~deb11u1fixed
bullseye (security)2.4.61-1~deb11u1fixed
bookworm2.4.62-1~deb12u1fixed
bookworm (security)2.4.61-1~deb12u1fixed
sid, trixie2.4.62-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
apache2sourceexperimental2.4.48-1
apache2sourcestretch(not affected)
apache2sourcebuster(not affected)
apache2source(unstable)2.4.46-6

Notes

[buster] - apache2 <not-affected> (Vulnerable code not present)
[stretch] - apache2 <not-affected> (Vulnerable code not present)
https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2020-13950
Fixed by: https://svn.apache.org/r1678771
Introduced by: https://svn.apache.org/r1656259

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