|Description||In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a different user, as demonstrated by logging in as root and entering umount followed by a tab character for autocompletion.|
|Source||CVE (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 severity||high (attack range: local)|
Vulnerable and fixed packages
The table below lists information on source packages.
|stretch (security), stretch||2.29.2-1+deb9u1||fixed|
|bullseye, sid, buster||2.33.1-0.1||fixed|
The information below is based on the following data on fixed versions.
[jessie] - util-linux <not-affected> (umount completion added later)
[wheezy] - util-linux <not-affected> (umount completion added later)
Fix in bash-completion's from util-linux:
src:util-linux/2.28-1 takes over the umount completion from
src:bash-completion (which in turn starting from 1:2.1-4.3
does not provide the umount completion in the binary packaage)