smack: fix bug: unprivileged task can create labels
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 94% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
smack: fix bug: unprivileged task can create labels
If an unprivileged task is allowed to relabel itself
(/smack/relabel-self is not empty),
it can freely create new labels by writing their
names into own /proc/PID/attr/smack/current
This occurs because do_setattr() imports
the provided label in advance,
before checking "relabel-self" list.
This change ensures that the "relabel-self" list
is checked before importing the label.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/4a7a7621619a366712fb9cefcb6e69f956c247cehttps://git.kernel.org/stable/c/60e8d49989410a7ade60f5dadfcd979c117d05c0https://git.kernel.org/stable/c/64aa81250171b6bb6803e97ea7a5d73bfa061f6ehttps://git.kernel.org/stable/c/6b1e45e13546c9ea0b1d99097993ac0aafae90b1https://git.kernel.org/stable/c/ac9fce2efabad37c338aac86fbe100f77a080e59https://git.kernel.org/stable/c/c147e13ea7fe9f118f8c9ba5e96cbd644b00d6b3https://git.kernel.org/stable/c/c80173233014a360c13fa5cc79d36bfe6e53a8edhttps://git.kernel.org/stable/c/f8fd5491100f920847a3338d5fba22db19c72773