Multiple use-after-free vulnerabilities in libxml2 2.5.10, 2.6.16, 2.6.26, 2.6.27, and 2.6.32, and libxml 1.8.17, allow context-dependent attackers to cause a denial of service (application crash) via crafted (1) Notation or (2) Enumeration attribute types in an XML file, as demonstrated by the Codenomicon XML fuzzing framework.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libxml | Xmlsoft | 1.8.17 (including) | 1.8.17 (including) |
| Libxml2 | Xmlsoft | 2.5.10 (including) | 2.5.10 (including) |
| Libxml2 | Xmlsoft | 2.6.16 (including) | 2.6.16 (including) |
| Libxml2 | Xmlsoft | 2.6.26 (including) | 2.6.26 (including) |
| Libxml2 | Xmlsoft | 2.6.27 (including) | 2.6.27 (including) |
| Libxml2 | Xmlsoft | 2.6.32 (including) | 2.6.32 (including) |
| Red Hat Enterprise Linux 3 | RedHat | libxml-1:1.8.17-9.3 | * |
| Red Hat Enterprise Linux 3 | RedHat | libxml2-0:2.5.10-15 | * |
| Red Hat Enterprise Linux 4 | RedHat | libxml2-0:2.6.16-12.7 | * |
| Red Hat Enterprise Linux 5 | RedHat | libxml2-0:2.6.26-2.1.2.8 | * |
| Libxml | Ubuntu | dapper | * |
| Libxml | Ubuntu | hardy | * |
| Libxml2 | Ubuntu | dapper | * |
| Libxml2 | Ubuntu | hardy | * |
| Libxml2 | Ubuntu | intrepid | * |
| Libxml2 | Ubuntu | jaunty | * |
| Libxml2 | Ubuntu | upstream | * |