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, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
apache2 (PTS)stretch (security), stretch2.4.25-3+deb9u9vulnerable
buster, buster (security)2.4.38-3+deb10u4vulnerable
bullseye2.4.46-4vulnerable
sid2.4.46-6fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
apache2sourceexperimental2.4.48-1
apache2source(unstable)2.4.46-6

Notes

https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2020-13950
Fixed by: https://svn.apache.org/r1678771
check why this only a problem starting in 2.4.41

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