| Name | CVE-2020-13776 |
| Description | systemd 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. |
| Source | CVE (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 Package | Release | Version | Status |
|---|
| systemd (PTS) | jessie, jessie (lts) | 215-17+deb8u15 | vulnerable |
| stretch (security) | 232-25+deb9u14 | vulnerable |
| stretch (lts), stretch | 232-25+deb9u17 | vulnerable |
| buster, buster (lts) | 241-7~deb10u11 | fixed |
| buster (security) | 241-7~deb10u10 | fixed |
| bullseye | 247.3-7+deb11u5 | fixed |
| bullseye (security) | 247.3-7+deb11u6 | fixed |
| bookworm | 252.31-1~deb12u1 | fixed |
| sid, trixie | 257~rc2-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| systemd | source | buster | (not affected) | | | |
| systemd | source | (unstable) | 246-2 | unimportant | | |
Notes
[buster] - systemd <not-affected> (Vulnerable code introduced later)
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.