In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate exceptions. They store the certificates as authorities, meaning that the owner of a certificate could impersonate any server after a client had added an exception.
The product does not validate, or incorrectly validates, a certificate.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Tigervnc | Tigervnc | * | 1.11.0 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | tigervnc-0:1.11.0-6.el8 | * |
| Tigervnc | Ubuntu | bionic | * |
| Tigervnc | Ubuntu | esm-apps/focal | * |
| Tigervnc | Ubuntu | groovy | * |
| Tigervnc | Ubuntu | trusty | * |
| Tigervnc | Ubuntu | upstream | * |