Bug 2532944

Summary: CVE-2022-42917 frr: FRRouting FRR: Privilege escalation via TOCTOU race condition [fedora-all]
Product: [Fedora] Fedora Reporter: Vladimir Vasilev <vvasilev>
Component: frrAssignee: Michal Ruprich <mruprich>
Status: CLOSED CURRENTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: fhrdina, mruprich, tkorbar, zpytela
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["64f2e558-b8fe-4d94-8e5a-f93c37aa65a5"]}
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Last Closed: 2026-09-14 09:30:20 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2532800    

Description Vladimir Vasilev 2026-09-14 07:40:44 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

In FRRouting FRR before 8.5, the service user (usually frr) can escalate its privileges to root by monitoring the configuration directory (/etc/frr) and replacing config files upon creation with, for example, symlinks to change the ownership of arbitrary files. This is a TOCTOU Race Condition caused by a combination of touch and chown.
Comment 1 Michal Ruprich 2026-09-14 09:30:20 UTC 
The fix for this CVE is already included in the version that is currently shipped. Closing.