CVE-2009-3376

CriticalCVSS 9.3/10Last modified Jun 16, 2026

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.

Metrics

CVSS 2.0 9.3/10AV:N/AC:M/Au:N/C:C/I:C/A:C

Weakness enumeration

CWE-16

Affected software

No affected versions have been published.

Timeline

Published
Oct 29, 2009
Last modified
Jun 16, 2026
NVD status
Modified

Related CVEs from 2009

CVE-2009-337710.0Multiple unspecified vulnerabilities in liboggz before cf5feeaab69b05e24, as used in Mozilla Firefox 3.5.x before 3.5.4, allow remote attackCVE-2009-33789.3The oggplay_data_handle_theora_frame function in media/liboggplay/src/liboggplay/oggplay_data.c in liboggplay, as used in Mozilla Firefox 3.CVE-2009-337910.0Multiple unspecified vulnerabilities in libvorbis, as used in Mozilla Firefox 3.5.x before 3.5.4, allow remote attackers to cause a denial oCVE-2009-338010.0Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox 3.0.x before 3.0.15 and 3.5.x before 3.5.4 allow remote attackCVE-2009-338110.0Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox 3.5.x before 3.5.4 allow remote attackers to cause a denial ofCVE-2009-338210.0layout/base/nsCSSFrameConstructor.cpp in the browser engine in Mozilla Firefox 3.0.x before 3.0.15 does not properly handle first-letter fraCVE-2009-338310.0Multiple unspecified vulnerabilities in the JavaScript engine in Mozilla Firefox 3.5.x before 3.5.4 allow remote attackers to cause a denialCVE-2009-33849.3Multiple unspecified vulnerabilities in WebKit in Apple Safari before 4.0.4 on Windows allow remote FTP servers to execute arbitrary code, cCVE-2009-33857.1The mail component in Mozilla SeaMonkey before 1.1.19 does not properly restrict execution of scriptable plugin content, which allows user-aCVE-2009-33865.0Template.pm in Bugzilla 3.3.2 through 3.4.3 and 3.5 through 3.5.1 allows remote attackers to discover the alias of a private bug by reading CVE-2009-33875.0Bugzilla 3.3.1 through 3.4.4, 3.5.1, and 3.5.2 does not allow group restrictions to be preserved throughout the process of moving a bug to aCVE-2009-33889.3liboggplay in Mozilla Firefox 3.5.x before 3.5.6 and SeaMonkey before 2.0.1 might allow context-dependent attackers to cause a denial of ser
CVE-2009-3376: Critical severity, CVSS 9.3 | Vulnix