Improper Preservation of Permissions Affecting kernel-tools package, versions <0:4.18.0-193.79.1.el8_2
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Test your applications- Snyk ID SNYK-RHEL8-KERNELTOOLS-4031302
- published 8 Mar 2022
- disclosed 7 Mar 2022
How to fix?
Upgrade RHEL:8 kernel-tools to version 0:4.18.0-193.79.1.el8_2 or higher.
This issue was patched in RHSA-2022:0820.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-tools package and not the kernel-tools package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2022-0847
- 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://bugzilla.redhat.com/show_bug.cgi?id=2060795
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
- https://dirtypipe.cm4all.com/
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015
- https://security.netapp.com/advisory/ntap-20220325-0005/
- https://www.suse.com/support/kb/doc/?id=000020603
- http://packetstormsecurity.com/files/176534/Linux-4.20-KTLS-Read-Only-Write.html
- https://www.exploit-db.com/exploits/50808
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog