Use-after-free vulnerability in the Cascading Style Sheets (CSS) implementation in WebKit in Apple Safari before 5.0 on Mac OS X 10.5 through 10.6 and Windows, and before 4.1 on Mac OS X 10.4, allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via vectors involving the :first-letter pseudo-element.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Safari | Apple | * | 4.0.5 (including) |
| Safari | Apple | 4.0 (including) | 4.0 (including) |
| Safari | Apple | 4.0.0b (including) | 4.0.0b (including) |
| Safari | Apple | 4.0.1 (including) | 4.0.1 (including) |
| Safari | Apple | 4.0.2 (including) | 4.0.2 (including) |
| Safari | Apple | 4.0.3 (including) | 4.0.3 (including) |
| Safari | Apple | 4.0.4 (including) | 4.0.4 (including) |
| Webkit | Apple | * | * |