Use-after-free vulnerability in the xmlDictComputeFastKey function in libxml2 before 2.9.4, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1, allows remote attackers to cause a denial of service via a crafted XML document.
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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.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 |
|---|---|---|---|
| Ubuntu_linux | Canonical | 12.04 (including) | 12.04 (including) |
| Ubuntu_linux | Canonical | 14.04 (including) | 14.04 (including) |
| Ubuntu_linux | Canonical | 15.10 (including) | 15.10 (including) |
| Ubuntu_linux | Canonical | 16.04 (including) | 16.04 (including) |
| Red Hat Enterprise Linux 6 | RedHat | libxml2-0:2.7.6-21.el6_8.1 | * |
| Red Hat Enterprise Linux 7 | RedHat | libxml2-0:2.9.1-6.el7_2.3 | * |
| Text-Only JBCS | RedHat | * | |
| Libxml2 | Ubuntu | esm-infra-legacy/trusty | * |
| Libxml2 | Ubuntu | esm-infra/xenial | * |
| Libxml2 | Ubuntu | trusty | * |
| Libxml2 | Ubuntu | trusty/esm | * |
| Libxml2 | Ubuntu | upstream | * |
| Libxml2 | Ubuntu | vivid/stable-phone-overlay | * |
| Libxml2 | Ubuntu | wily | * |
| Libxml2 | Ubuntu | xenial | * |