CVE-2009-3376 - CVE House
Back to Database
Status published Critical CVE-2009-3376

Mozilla Firefox before 3.0.15 and 3.5.x before 3.5.4, and SeaMonkey...

Vulnerability Description

Mozilla Firefox before 3.0.15 and 3.5.x before 3.5.4, and SeaMonkey before 2.0, does not properly handle a right-to-left override (aka RLO or U+202E) Unicode character in a download filename, which allows remote attackers to spoof file extensions via a crafted filename, as demonstrated by displaying a non-executable extension for an executable file.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2009-3376

Credits & Attribution

No credits recorded in the NVD database.

References

More from mozilla

View All →
CVE-2025-66453
Rhino vulnerable high CPU usage and potential DoS when passing specific numbers to toFixed() function
Medium 5.5
CVE-2022-29167
ReDoS vulnerability in header parsing in hawk
High 7.4
CVE-2021-21354
Open redirect in pollbot
High 7.4
CVE-2020-15660
Missing checks on Content-Type headers in geckodriver before 0.27.0 could...
High 8.8
CVE-2018-7753
An issue was discovered in Bleach 2.1.x before 2.1.3. Attributes...
Critical 9.8

Affected Vendor

Affected Software

firefox, seamonkey
Vulnerable Versions:
3.0, 3.0.1, 3.0.2, 3.0.3, 3.0.4, 3.0.5, 3.0.6, 3.0.7, 3.0.8, 3.0.9, 3.0.10, 3.0.11, 3.0.12, 3.0.13, 3.5.1, 3.5.2, 3.5.3, 0, 1.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7, 1.0.8, 1.0.9, 1.1, 1.1.1, 1.1.2, 1.1.3, 1.1.4, 1.1.5, 1.1.6, 1.1.7, 1.1.8, 1.1.9, 1.1.10, 1.1.11, 1.1.12, 1.1.13, 1.1.14, 1.1.15, 1.1.16, 1.1.17, 1.5.0.8, 1.5.0.9

Timeline

Official Publish: October 29th, 2009
Last Modified: August 7th, 2024
Added to House: July 19th, 2026

CVSS Vectors

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.