A new Linux vulnerability known as 'Dirty Pipe' allows local users to gain root privileges through publicly available exploits.
Today, security researcher Max Kellermann responsibly disclosed the 'Dirty Pipe' vulnerability and stated that it affects Linux Kernel 5.8 and later versions, even on Android devices.
The vulnerability is tracked as CVE-2022-0847 and allows a non-privileged user to inject and overwrite data in read-only files, including SUID processes that run as root.
Kellerman discovered the bug after tracking down a bug that was corrupting web server access logs for one of his customers.
Kellerman states that the vulnerability is similar to the
Dirty COW vulnerability (CVE-2016-5195) fixed in 2016.
Public exploits give root privileges
As part of the
Dirty Pipe disclosure, Kellerman released a proof-of-concept (PoC) exploit that allows local users to inject their own data into sensitive read-only files, removing restrictions or modifying configurations to provide greater access than they usually would have.
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