UBUNTU-CVE-2022-0847
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.
02 / AFFECTED SOFTWARE
Affected packages
29 explicit affected versions
26 explicit affected versions
11 explicit affected versions
4 explicit affected versions
7 explicit affected versions
33 explicit affected versions
4 explicit affected versions
38 explicit affected versions
13 explicit affected versions
6 explicit affected versions
4 explicit affected versions
10 explicit affected versions
7 explicit affected versions
10 explicit affected versions
10 explicit affected versions
21 explicit affected versions
13 explicit affected versions
12 explicit affected versions
4 explicit affected versions
3 explicit affected versions
6 explicit affected versions
23 explicit affected versions
5 explicit affected versions
12 explicit affected versions
44 explicit affected versions
4 explicit affected versions
4 explicit affected versions
9 explicit affected versions
12 explicit affected versions
13 explicit affected versions
1 explicit affected versions
7 explicit affected versions
4 explicit affected versions
16 explicit affected versions
43 explicit affected versions
12 explicit affected versions
12 explicit affected versions
50 explicit affected versions
12 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://dirtypipe.cm4all.com/
- https://ubuntu.com/security/CVE-2022-0847
- https://ubuntu.com/security/notices/USN-5317-1
- https://ubuntu.com/security/notices/USN-5362-1
- https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/DirtyPipe
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- https://www.cve.org/CVERecord?id=CVE-2022-0847
- https://www.openwall.com/lists/oss-security/2022/03/07/1