Service Advisory - Dirty Pipe vulnerability (CVE-2022-0847)
Posted on
March 14, 2022
Service Advisory
Please share the following information with your technical teams.
Recently a new Linux vulnerability is being disclosed know an Dirty Pipe which allows local users to gain root privileges through publicly available exploits. It allows overwriting data in arbitrary read-only files . This leads to privilege escalation because unprivileged processes can inject code into root processes.
Severity Level
CVSS Score: 7.8
Description
A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe and push_pipe functions in the Linux kernel and could thus contain stale values. An unprivileged local user could use this flaw to write to pages in the page cache backed by read only files and as such escalate their privileges on the system.
Affected Versions Linux Kernel 5.8 and later versions, even on Android devices.
Impact
local users to gain root privileges.
Resolution
fixed in Linux kernels 5.16.11, 5.15.25, and 5.10.102.
