Improper Preservation of Permissions Affecting bpftool package, versions <0:4.18.0-348.20.1.el8_5
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Test your applications- Snyk ID SNYK-CENTOS8-BPFTOOL-2419191
- published 8 Mar 2022
- disclosed 7 Mar 2022
How to fix?
Upgrade Centos:8 bpftool to version 0:4.18.0-348.20.1.el8_5 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream bpftool package and not the bpftool package as distributed by Centos.
See How to fix? for Centos: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
- https://access.redhat.com/errata/RHSA-2022:0825
- 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