CVE-2009-3382

Firefox 3.0.x - Remote Code Execution via First-Letter Frame Handling

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2009-3382. PoCs published by Carsten Book.

AI-analyzed exploit summary This exploit leverages a memory corruption vulnerability in Mozilla Firefox by manipulating CSS and DOM properties to trigger arbitrary code execution or a denial-of-service condition.

Description

layout/base/nsCSSFrameConstructor.cpp in the browser engine in Mozilla Firefox 3.0.x before 3.0.15 does not properly handle first-letter frames, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unspecified vectors.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Carsten Book · htmldoslinux
https://www.exploit-db.com/exploits/33314

This exploit leverages a memory corruption vulnerability in Mozilla Firefox by manipulating CSS and DOM properties to trigger arbitrary code execution or a denial-of-service condition.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Mozilla Firefox (versions affected by CVE-2009-3382)
No auth needed
Prerequisites: Victim must visit a malicious webpage
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (6)

Core 6
Core References
Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5581
Vendor Advisory vendor-advisory x_refsource_sunalert
http://sunsolve.sun.com/search/document.do?assetkey=1-26-272909-1
Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11219
Issue Tracking x_refsource_confirm
https://bugzilla.mozilla.org/show_bug.cgi?id=514960
Patch, Vendor Advisory x_refsource_confirm
http://www.mozilla.org/security/announce/2009/mfsa2009-64.html
Third Party Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2009/3334

Scores

EPSS 0.1084
EPSS Percentile 95.3%

Details

Status published
Products (14)
mozilla/firefox 3.0.1
mozilla/firefox 3.0.2
mozilla/firefox 3.0.3
mozilla/firefox 3.0.4
mozilla/firefox 3.0.5
mozilla/firefox 3.0.6
mozilla/firefox 3.0.7
mozilla/firefox 3.0.8
mozilla/firefox 3.0.9
mozilla/firefox 3.0.10
... and 4 more
Published Oct 29, 2009
Tracked Since Feb 18, 2026