The layout engine in Mozilla Firefox before 4.0, Thunderbird before 3.3, and SeaMonkey before 2.1 executes different code for visited and unvisited links during the processing of Cascading Style Sheets (CSS) token sequences, which makes it easier for remote attackers to obtain sensitive information about visited web pages via a timing attack.
2011-12-07T19:55:01.627
2025-04-11T00:51:21.963
Deferred
CVSSv2: 4.3 (MEDIUM)
AV:N/AC:M/Au:N/C:P/I:N/A:N
8.6
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | mozilla | firefox | ≤ 3.6.24 | Yes |
| 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 | 3.0.14 | Yes |
| Application | mozilla | firefox | 3.0.15 | Yes |
| Application | mozilla | firefox | 3.0.16 | Yes |
| Application | mozilla | firefox | 3.0.17 | Yes |
| Application | mozilla | firefox | 3.5 | Yes |
| Application | mozilla | firefox | 3.5.1 | Yes |
| Application | mozilla | firefox | 3.5.2 | Yes |
| Application | mozilla | firefox | 3.5.3 | Yes |
| Application | mozilla | firefox | 3.5.4 | Yes |
| Application | mozilla | firefox | 3.5.5 | Yes |
| Application | mozilla | firefox | 3.5.6 | Yes |
| Application | mozilla | firefox | 3.5.7 | Yes |
| Application | mozilla | firefox | 3.5.8 | Yes |
| Application | mozilla | firefox | 3.5.9 | Yes |
| Application | mozilla | firefox | 3.5.10 | Yes |
| Application | mozilla | firefox | 3.5.11 | Yes |
| Application | mozilla | firefox | 3.5.12 | Yes |
| Application | mozilla | firefox | 3.5.13 | Yes |
| Application | mozilla | firefox | 3.5.14 | Yes |
| Application | mozilla | firefox | 3.5.15 | Yes |
| Application | mozilla | firefox | 3.6 | Yes |
| Application | mozilla | firefox | 3.6.1 | Yes |
| Application | mozilla | firefox | 3.6.2 | Yes |
| Application | mozilla | firefox | 3.6.3 | Yes |
| Application | mozilla | firefox | 3.6.4 | Yes |
| Application | mozilla | firefox | 3.6.6 | Yes |
| Application | mozilla | firefox | 3.6.7 | Yes |
| Application | mozilla | firefox | 3.6.8 | Yes |
| Application | mozilla | firefox | 3.6.9 | Yes |
| Application | mozilla | firefox | 3.6.10 | Yes |
| Application | mozilla | firefox | 3.6.11 | Yes |
| Application | mozilla | firefox | 3.6.12 | Yes |
| Application | mozilla | firefox | 3.6.13 | Yes |
| Application | mozilla | firefox | 3.6.14 | Yes |
| Application | mozilla | firefox | 3.6.15 | Yes |
| Application | mozilla | firefox | 3.6.16 | Yes |
| Application | mozilla | firefox | 3.6.17 | Yes |
| Application | mozilla | firefox | 3.6.18 | Yes |
| Application | mozilla | firefox | 3.6.19 | Yes |
| Application | mozilla | firefox | 3.6.20 | Yes |
| Application | mozilla | firefox | 3.6.21 | Yes |
| Application | mozilla | firefox | 3.6.22 | Yes |
| Application | mozilla | firefox | 3.6.23 | Yes |
| Application | mozilla | thunderbird | ≤ 3.1.16 | Yes |
| Application | mozilla | thunderbird | 3.0 | Yes |
| Application | mozilla | thunderbird | 3.0.1 | Yes |
| Application | mozilla | thunderbird | 3.0.2 | Yes |
| Application | mozilla | thunderbird | 3.0.3 | Yes |
| Application | mozilla | thunderbird | 3.0.4 | Yes |
| Application | mozilla | thunderbird | 3.0.5 | Yes |
| Application | mozilla | thunderbird | 3.0.6 | Yes |
| Application | mozilla | thunderbird | 3.0.7 | Yes |
| Application | mozilla | thunderbird | 3.0.8 | Yes |
| Application | mozilla | thunderbird | 3.0.9 | Yes |
| Application | mozilla | thunderbird | 3.0.10 | Yes |
| Application | mozilla | thunderbird | 3.0.11 | Yes |
| Application | mozilla | thunderbird | 3.1 | Yes |
| Application | mozilla | thunderbird | 3.1.1 | Yes |
| Application | mozilla | thunderbird | 3.1.2 | Yes |
| Application | mozilla | thunderbird | 3.1.3 | Yes |
| Application | mozilla | thunderbird | 3.1.4 | Yes |
| Application | mozilla | thunderbird | 3.1.5 | Yes |
| Application | mozilla | thunderbird | 3.1.6 | Yes |
| Application | mozilla | thunderbird | 3.1.7 | Yes |
| Application | mozilla | thunderbird | 3.1.8 | Yes |
| Application | mozilla | thunderbird | 3.1.9 | Yes |
| Application | mozilla | thunderbird | 3.1.10 | Yes |
| Application | mozilla | thunderbird | 3.1.11 | Yes |
| Application | mozilla | thunderbird | 3.1.12 | Yes |
| Application | mozilla | thunderbird | 3.1.13 | Yes |
| Application | mozilla | thunderbird | 3.1.14 | Yes |
| Application | mozilla | thunderbird | 3.1.15 | Yes |
| Application | mozilla | seamonkey | ≤ 2.1 | 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 | 1.1.18 | Yes |
| Application | mozilla | seamonkey | 1.1.19 | Yes |
| Application | mozilla | seamonkey | 1.5.0.8 | Yes |
| Application | mozilla | seamonkey | 1.5.0.9 | Yes |
| Application | mozilla | seamonkey | 1.5.0.10 | Yes |
| Application | mozilla | seamonkey | 2.0 | Yes |
| Application | mozilla | seamonkey | 2.0 | Yes |
| Application | mozilla | seamonkey | 2.0 | Yes |
| Application | mozilla | seamonkey | 2.0 | Yes |
| Application | mozilla | seamonkey | 2.0 | Yes |
| Application | mozilla | seamonkey | 2.0 | Yes |
| Application | mozilla | seamonkey | 2.0 | Yes |
| Application | mozilla | seamonkey | 2.0 | Yes |
| Application | mozilla | seamonkey | 2.0.1 | Yes |
| Application | mozilla | seamonkey | 2.0.2 | Yes |
| Application | mozilla | seamonkey | 2.0.3 | Yes |
| Application | mozilla | seamonkey | 2.0.4 | Yes |
| Application | mozilla | seamonkey | 2.0.5 | Yes |
| Application | mozilla | seamonkey | 2.0.6 | Yes |
| Application | mozilla | seamonkey | 2.0.7 | Yes |
| Application | mozilla | seamonkey | 2.0.8 | Yes |
| Application | mozilla | seamonkey | 2.0.9 | Yes |
| Application | mozilla | seamonkey | 2.0.10 | Yes |
| Application | mozilla | seamonkey | 2.0.11 | Yes |
| Application | mozilla | seamonkey | 2.0.12 | Yes |
| Application | mozilla | seamonkey | 2.0.13 | Yes |
| Application | mozilla | seamonkey | 2.0.14 | Yes |
| Application | mozilla | seamonkey | 2.0a1 | Yes |
| Application | mozilla | seamonkey | 2.1 | Yes |
| Application | mozilla | seamonkey | 2.1 | Yes |