Description
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.
Published: 2026-09-13
Score: 6.7 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sun, 13 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
First Time appeared Frrouting
Frrouting frrouting
Weaknesses CWE-367
CPEs cpe:2.3:a:frrouting:frrouting:*:*:*:*:*:*:*:*
Vendors & Products Frrouting
Frrouting frrouting
Metrics cvssV3_1

{'score': 6.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H'}

Sun, 13 Sep 2026 23:30:00 +0000

Type Values Removed Values Added
Description 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.
References

Subscriptions

Frrouting Frrouting
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-13T23:27:43.157Z

Reserved: 2022-10-13T00:00:00.000Z

Link: CVE-2022-42917

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-367

    Time-of-check Time-of-use (TOCTOU) Race Condition