PHP before 5.3.9 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.
2011-12-30T01:55:01.563
2025-04-11T00:51:21.963
Deferred
CVSSv2: 5.0 (MEDIUM)
AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | php | php | ≤ 5.3.8 | 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 | 5.1.1 | 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 |
| Application | php | php | 5.2.1 | Yes |
| Application | php | php | 5.2.2 | Yes |
| Application | php | php | 5.2.3 | Yes |
| Application | php | php | 5.2.4 | Yes |
| Application | php | php | 5.2.5 | Yes |
| Application | php | php | 5.2.6 | Yes |
| Application | php | php | 5.2.7 | Yes |
| Application | php | php | 5.2.8 | Yes |
| Application | php | php | 5.2.9 | Yes |
| Application | php | php | 5.2.10 | Yes |
| Application | php | php | 5.2.11 | Yes |
| Application | php | php | 5.2.12 | Yes |
| Application | php | php | 5.2.14 | Yes |
| Application | php | php | 5.2.15 | Yes |
| Application | php | php | 5.2.16 | Yes |
| Application | php | php | 5.2.17 | Yes |
| Application | php | php | 5.3.0 | Yes |
| Application | php | php | 5.3.1 | Yes |
| Application | php | php | 5.3.2 | Yes |
| Application | php | php | 5.3.3 | Yes |
| Application | php | php | 5.3.4 | Yes |
| Application | php | php | 5.3.5 | Yes |
| Application | php | php | 5.3.6 | Yes |
| Application | php | php | 5.3.7 | Yes |