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: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13776
Reference (s):
- https://security.netapp.com/advisory/ntap-20200611-0003/
- FEDORA:FEDORA-2020-2faf839786
- URL: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IYGLFEKG45EYBJ7TPQMLWROWPTZBEU63/
- https://github.com/systemd/systemd/issues/15985