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.
{
"extracted_events": [
{
"cpe": "cpe:2.3:a:kernel:util-linux:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "2.31"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "75f03badd7ed9f1dd951863d75e756883d3acc55"
}
],
"source": "REFERENCES_COMMIT"
}
]
}