PHP 4.x and 5.x before 5.2.1, when running on multi-threaded systems, does not ensure thread safety for libc crypt function calls using protection schemes such as a mutex, which creates race conditions that allow remote attackers to overwrite internal program memory and gain system access.
2007-05-24T18:30:00.000
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 | php | php | 4.0 | Yes |
| Application | php | php | 4.0 | Yes |
| Application | php | php | 4.0 | Yes |
| Application | php | php | 4.0 | Yes |
| Application | php | php | 4.0 | Yes |
| Application | php | php | 4.0 | Yes |
| Application | php | php | 4.0 | Yes |
| Application | php | php | 4.0 | Yes |
| Application | php | php | 4.0.0 | Yes |
| Application | php | php | 4.0.1 | Yes |
| Application | php | php | 4.0.1 | Yes |
| Application | php | php | 4.0.1 | Yes |
| Application | php | php | 4.0.2 | Yes |
| Application | php | php | 4.0.3 | Yes |
| Application | php | php | 4.0.3 | Yes |
| Application | php | php | 4.0.4 | Yes |
| Application | php | php | 4.0.4 | Yes |
| Application | php | php | 4.0.5 | Yes |
| Application | php | php | 4.0.6 | Yes |
| Application | php | php | 4.0.7 | Yes |
| Application | php | php | 4.0.7 | Yes |
| Application | php | php | 4.0.7 | Yes |
| Application | php | php | 4.0.7 | Yes |
| Application | php | php | 4.1.0 | Yes |
| Application | php | php | 4.1.1 | Yes |
| Application | php | php | 4.1.2 | Yes |
| Application | php | php | 4.2.0 | Yes |
| Application | php | php | 4.2.1 | Yes |
| Application | php | php | 4.2.2 | Yes |
| Application | php | php | 4.2.3 | Yes |
| Application | php | php | 4.3.0 | Yes |
| Application | php | php | 4.3.1 | Yes |
| Application | php | php | 4.3.2 | Yes |
| Application | php | php | 4.3.3 | Yes |
| Application | php | php | 4.3.4 | Yes |
| Application | php | php | 4.3.5 | Yes |
| Application | php | php | 4.3.6 | Yes |
| Application | php | php | 4.3.7 | Yes |
| Application | php | php | 4.3.8 | Yes |
| Application | php | php | 4.3.9 | Yes |
| Application | php | php | 4.3.10 | Yes |
| Application | php | php | 4.3.11 | Yes |
| Application | php | php | 4.4.0 | Yes |
| Application | php | php | 4.4.1 | Yes |
| Application | php | php | 4.4.2 | Yes |
| Application | php | php | 4.4.3 | Yes |
| Application | php | php | 4.4.4 | Yes |
| Application | php | php | 4.4.5 | Yes |
| Application | php | php | 4.4.6 | Yes |
| Application | php | php | 5.0 | Yes |
| Application | php | php | 5.0 | Yes |
| Application | php | php | 5.0 | Yes |
| Application | php | php | 5.0.0 | Yes |
| Application | php | php | 5.0.0 | Yes |
| Application | php | php | 5.0.0 | Yes |
| Application | php | php | 5.0.0 | Yes |
| Application | php | php | 5.0.0 | Yes |
| Application | php | php | 5.0.0 | Yes |
| Application | php | php | 5.0.0 | Yes |
| Application | php | php | 5.0.0 | Yes |
| Application | php | php | 5.0.1 | Yes |
| Application | php | php | 5.0.2 | Yes |
| Application | php | php | 5.0.3 | Yes |
| Application | php | php | 5.0.4 | Yes |
| Application | php | php | 5.0.5 | Yes |
| Application | php | php | 5.1.0 | Yes |
| Application | php | php | 5.1.1 | Yes |
| Application | php | php | 5.1.2 | Yes |
| Application | php | php | 5.1.3 | Yes |
| Application | php | php | 5.1.4 | Yes |
| Application | php | php | 5.1.5 | Yes |
| Application | php | php | 5.1.6 | Yes |
| Application | php | php | 5.2.0 | Yes |