A vulnerability was found in gnutls versions from 3.5.8 before 3.6.7. A memory corruption (double free) vulnerability in the certificate verification API. Any client or server application that verifies X.509 certificates with GnuTLS 3.5.8 or later is affected.
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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.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 |
|---|---|---|---|
| Gnutls | Gnu | 3.5.8 (including) | 3.6.7 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | gnutls-0:3.6.8-8.el8 | * |
| Red Hat Enterprise Linux 8 | RedHat | gnutls-0:3.6.8-8.el8 | * |
| Gnutls28 | Ubuntu | bionic | * |
| Gnutls28 | Ubuntu | cosmic | * |
| Gnutls28 | Ubuntu | disco | * |
| Gnutls28 | Ubuntu | esm-infra/bionic | * |
| Gnutls28 | Ubuntu | upstream | * |