Use-after-free vulnerability in kbx/keybox-blob.c in GPGSM in GnuPG 2.x through 2.0.16 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a certificate with a large number of Subject Alternate Names, which is not properly handled in a realloc operation when importing the certificate or verifying its signature.
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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.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 |
|---|---|---|---|
| Gnupg | Gnupg | 2.0.0 (including) | 2.0.16 (including) |
| Red Hat Enterprise Linux 5 | RedHat | gnupg2-0:2.0.10-3.el5_5.1 | * |
| Gnupg2 | Ubuntu | dapper | * |
| Gnupg2 | Ubuntu | devel | * |
| Gnupg2 | Ubuntu | hardy | * |
| Gnupg2 | Ubuntu | jaunty | * |
| Gnupg2 | Ubuntu | karmic | * |
| Gnupg2 | Ubuntu | lucid | * |
| Gnupg2 | Ubuntu | upstream | * |