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.
2009-10-29T14:30:00.983
2025-04-09T00:30:58.490
Deferred
CVSSv2: 9.3 (HIGH)
AV:N/AC:M/Au:N/C:C/I:C/A:C
8.6
10.0
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | mozilla | firefox | 3.0 | Yes |
| Application | mozilla | firefox | 3.0.1 | Yes |
| Application | mozilla | firefox | 3.0.2 | Yes |
| Application | mozilla | firefox | 3.0.3 | Yes |
| Application | mozilla | firefox | 3.0.4 | Yes |
| Application | mozilla | firefox | 3.0.5 | Yes |
| Application | mozilla | firefox | 3.0.6 | Yes |
| Application | mozilla | firefox | 3.0.7 | Yes |
| Application | mozilla | firefox | 3.0.8 | Yes |
| Application | mozilla | firefox | 3.0.9 | Yes |
| Application | mozilla | firefox | 3.0.10 | Yes |
| Application | mozilla | firefox | 3.0.11 | Yes |
| Application | mozilla | firefox | 3.0.12 | Yes |
| Application | mozilla | firefox | 3.0.13 | Yes |
| Application | mozilla | firefox | 3.5.1 | Yes |
| Application | mozilla | firefox | 3.5.2 | Yes |
| Application | mozilla | firefox | 3.5.3 | Yes |
| Application | mozilla | seamonkey | ≤ 1.5.0.10 | Yes |
| Application | mozilla | seamonkey | 1.0 | Yes |
| Application | mozilla | seamonkey | 1.0 | Yes |
| Application | mozilla | seamonkey | 1.0 | Yes |
| Application | mozilla | seamonkey | 1.0.1 | Yes |
| Application | mozilla | seamonkey | 1.0.2 | Yes |
| Application | mozilla | seamonkey | 1.0.3 | Yes |
| Application | mozilla | seamonkey | 1.0.4 | Yes |
| Application | mozilla | seamonkey | 1.0.5 | Yes |
| Application | mozilla | seamonkey | 1.0.6 | Yes |
| Application | mozilla | seamonkey | 1.0.7 | Yes |
| Application | mozilla | seamonkey | 1.0.8 | Yes |
| Application | mozilla | seamonkey | 1.0.9 | Yes |
| Application | mozilla | seamonkey | 1.1 | Yes |
| Application | mozilla | seamonkey | 1.1 | Yes |
| Application | mozilla | seamonkey | 1.1 | Yes |
| Application | mozilla | seamonkey | 1.1.1 | Yes |
| Application | mozilla | seamonkey | 1.1.2 | Yes |
| Application | mozilla | seamonkey | 1.1.3 | Yes |
| Application | mozilla | seamonkey | 1.1.4 | Yes |
| Application | mozilla | seamonkey | 1.1.5 | Yes |
| Application | mozilla | seamonkey | 1.1.6 | Yes |
| Application | mozilla | seamonkey | 1.1.7 | Yes |
| Application | mozilla | seamonkey | 1.1.8 | Yes |
| Application | mozilla | seamonkey | 1.1.9 | Yes |
| Application | mozilla | seamonkey | 1.1.10 | Yes |
| Application | mozilla | seamonkey | 1.1.11 | Yes |
| Application | mozilla | seamonkey | 1.1.12 | Yes |
| Application | mozilla | seamonkey | 1.1.13 | Yes |
| Application | mozilla | seamonkey | 1.1.14 | Yes |
| Application | mozilla | seamonkey | 1.1.15 | Yes |
| Application | mozilla | seamonkey | 1.1.16 | Yes |
| Application | mozilla | seamonkey | 1.1.17 | Yes |
| Application | mozilla | seamonkey | 1.5.0.8 | Yes |
| Application | mozilla | seamonkey | 1.5.0.9 | Yes |