GNU inetutils through 2.4 may allow privilege escalation because of unchecked return values of set*id() family functions in ftpd, rcp, rlogin, rsh, rshd, and uucpd. This is, for example, relevant if the setuid system call fails when a process is trying to drop privileges before letting an ordinary user control the activities of the process.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-40303
• https://ftp.gnu.org/gnu/inetutils/
• https://git.savannah.gnu.org/cgit/inetutils.git/commit/?id=e4e65c03f4c11292a3e40ef72ca3f194c8bffdd6
• https://lists.gnu.org/archive/html/bug-inetutils/2023-07/msg00000.html
• https://lists.debian.org/debian-lts-announce/2023/10/msg00013.html
• http://www.openwall.com/lists/oss-security/2023/12/30/4