Interaction between the sks-keyserver code through 1.2.0 of the SKS keyserver network, and GnuPG through 2.2.16, makes it risky to have a GnuPG keyserver configuration line referring to a host on the SKS keyserver network. Retrieving data from this network may cause a persistent denial of service, because of a Certificate Spamming Attack.
The product does not validate, or incorrectly validates, a certificate.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Gnupg | Gnupg | * | 2.2.16 (including) |
| Sks_keyserver | Sks_keyserver_project | * | 1.2.0 (including) |
| Red Hat Enterprise Linux 8 | RedHat | gnupg2-0:2.2.20-2.el8 | * |
| Gnupg | Ubuntu | precise/esm | * |
| Gnupg | Ubuntu | trusty/esm | * |
| Gnupg | Ubuntu | xenial | * |
| Gnupg2 | Ubuntu | bionic | * |
| Gnupg2 | Ubuntu | disco | * |
| Gnupg2 | Ubuntu | eoan | * |
| Gnupg2 | Ubuntu | esm-infra/xenial | * |
| Gnupg2 | Ubuntu | upstream | * |
| Gnupg2 | Ubuntu | xenial | * |
| Sks | Ubuntu | bionic | * |
| Sks | Ubuntu | cosmic | * |
| Sks | Ubuntu | disco | * |
| Sks | Ubuntu | eoan | * |
| Sks | Ubuntu | trusty | * |
| Sks | Ubuntu | upstream | * |
| Sks | Ubuntu | xenial | * |