CVE-2022-4318 — A vulnerability was found in cri-o

A vulnerability was found in cri-o. This issue allows the addition of arbitrary lines into /etc/passwd by use of a specially crafted environment variable.

01What is this vulnerability?

A vulnerability was found in cri-o. This issue allows the addition of arbitrary lines into /etc/passwd by use of a specially crafted environment variable.

02Affected products

Vendor	Product	Versions
Red Hat	Red Hat OpenShift Container Platform 4.11	0:1.24.4-10.rhaos4.11.git1ed5ac5.el8
Red Hat	Red Hat OpenShift Container Platform 4.12	0:1.25.2-9.rhaos4.12.git0a083f9.el9
Red Hat	Red Hat Enterprise Linux 9	unspecified

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-09-25T19:23:02.119Z
• Last modified: 2024-08-03T01:34:50.124Z

09References

• access.redhat.com — https://access.redhat.com/errata/RHSA-2023:1033
• access.redhat.com — https://access.redhat.com/errata/RHSA-2023:1503
• access.redhat.com — https://access.redhat.com/security/cve/CVE-2022-4318
• bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=2152703