Integer overflow in the object_custom function in ext/standard/var_unserializer.c in PHP before 5.4.34, 5.5.x before 5.5.18, and 5.6.x before 5.6.2 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via an argument to the unserialize function that triggers calculation of a large length value.
2014-10-29T10:55:03.820
2025-04-12T10:46:40.837
Deferred
CVSSv2: 7.5 (HIGH)
AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | php | php | ≤ 5.4.33 | Yes |
| Application | php | php | 5.4.0 | Yes |
| Application | php | php | 5.4.1 | Yes |
| Application | php | php | 5.4.2 | Yes |
| Application | php | php | 5.4.3 | Yes |
| Application | php | php | 5.4.4 | Yes |
| Application | php | php | 5.4.5 | Yes |
| Application | php | php | 5.4.6 | Yes |
| Application | php | php | 5.4.7 | Yes |
| Application | php | php | 5.4.8 | Yes |
| Application | php | php | 5.4.9 | Yes |
| Application | php | php | 5.4.10 | Yes |
| Application | php | php | 5.4.11 | Yes |
| Application | php | php | 5.4.12 | Yes |
| Application | php | php | 5.4.12 | Yes |
| Application | php | php | 5.4.12 | Yes |
| Application | php | php | 5.4.13 | Yes |
| Application | php | php | 5.4.13 | Yes |
| Application | php | php | 5.4.14 | Yes |
| Application | php | php | 5.4.14 | Yes |
| Application | php | php | 5.4.15 | Yes |
| Application | php | php | 5.4.16 | Yes |
| Application | php | php | 5.4.17 | Yes |
| Application | php | php | 5.4.18 | Yes |
| Application | php | php | 5.4.19 | Yes |
| Application | php | php | 5.4.20 | Yes |
| Application | php | php | 5.4.21 | Yes |
| Application | php | php | 5.4.22 | Yes |
| Application | php | php | 5.4.23 | Yes |
| Application | php | php | 5.4.24 | Yes |
| Application | php | php | 5.4.25 | Yes |
| Application | php | php | 5.4.26 | Yes |
| Application | php | php | 5.4.27 | Yes |
| Application | php | php | 5.4.28 | Yes |
| Application | php | php | 5.4.29 | Yes |
| Application | php | php | 5.4.30 | Yes |
| Application | php | php | 5.4.31 | Yes |
| Application | php | php | 5.4.32 | Yes |
| Application | php | php | 5.5.0 | Yes |
| Application | php | php | 5.5.0 | Yes |
| Application | php | php | 5.5.0 | Yes |
| Application | php | php | 5.5.0 | Yes |
| Application | php | php | 5.5.0 | Yes |
| Application | php | php | 5.5.0 | Yes |
| Application | php | php | 5.5.0 | Yes |
| Application | php | php | 5.5.0 | Yes |
| Application | php | php | 5.5.0 | Yes |
| Application | php | php | 5.5.0 | Yes |
| Application | php | php | 5.5.0 | Yes |
| Application | php | php | 5.5.0 | Yes |
| Application | php | php | 5.5.0 | Yes |
| Application | php | php | 5.5.1 | Yes |
| Application | php | php | 5.5.2 | Yes |
| Application | php | php | 5.5.3 | Yes |
| Application | php | php | 5.5.4 | Yes |
| Application | php | php | 5.5.5 | Yes |
| Application | php | php | 5.5.6 | Yes |
| Application | php | php | 5.5.7 | Yes |
| Application | php | php | 5.5.8 | Yes |
| Application | php | php | 5.5.9 | Yes |
| Application | php | php | 5.5.10 | Yes |
| Application | php | php | 5.5.11 | Yes |
| Application | php | php | 5.5.12 | Yes |
| Application | php | php | 5.5.13 | Yes |
| Application | php | php | 5.5.14 | Yes |
| Application | php | php | 5.5.15 | Yes |
| Application | php | php | 5.5.16 | Yes |
| Application | php | php | 5.5.17 | Yes |
| Application | php | php | 5.6.0 | Yes |
| Application | php | php | 5.6.1 | Yes |