CVE-2020-13776

NameCVE-2020-13776
Descriptionsystemd through v245 mishandles numerical usernames such as ones composed of decimal digits or 0x followed by hex digits, as demonstrated by use of root privileges when privileges of the 0x0 user account were intended. NOTE: this issue exists because of an incomplete fix for CVE-2017-1000082.
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 severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
systemd (PTS)stretch232-25+deb9u12vulnerable
stretch (security)232-25+deb9u11vulnerable
buster241-7~deb10u4vulnerable
bullseye, sid246.5-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
systemdsource(unstable)246-2unimportant

Notes

https://github.com/systemd/systemd/issues/15985
https://github.com/systemd/systemd/commit/156a5fd297b61bce31630d7a52c15614bf784843 (v246-rc1)
https://github.com/systemd/systemd/commit/6495ceddf38aed2c9efdcf9d3440140190800b55 (v246-rc1)
Issue exists due to an incomplete fix for CVE-2017-1000082.

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