CVE-2022-0847 Information

Description

A flaw was found in the way the lags\ 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.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://bugzilla.redhat.com/show_bug.cgi?id=2060795 https://dirtypipe.cm4all.com/ http://packetstormsecurity.com/files/166229/Dirty-Pipe-Linux-Privilege-Escalation.html http://packetstormsecurity.com/files/166230/Dirty-Pipe-SUID-Binary-Hijack-Privilege-Escalation.html http://packetstormsecurity.com/files/166258/Dirty-Pipe-Local-Privilege-Escalation.html https://www.suse.com/support/kb/doc/?id=000020603 https://security.netapp.com/advisory/ntap-20220325-0005/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8