The x11_open_helper function in channels.c in ssh in OpenSSH before 6.9, when ForwardX11Trusted mode is not used, lacks a check of the refusal deadline for X connections, which makes it easier for remote attackers to bypass intended access restrictions via a connection outside of the permitted time window.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Openssh | Openbsd | * | 6.8 (including) |
| Red Hat Enterprise Linux 6 | RedHat | openssh-0:5.3p1-117.el6 | * |
| Openssh | Ubuntu | devel | * |
| Openssh | Ubuntu | esm-infra-legacy/trusty | * |
| Openssh | Ubuntu | precise | * |
| Openssh | Ubuntu | trusty | * |
| Openssh | Ubuntu | trusty/esm | * |
| Openssh | Ubuntu | upstream | * |
| Openssh | Ubuntu | utopic | * |
| Openssh | Ubuntu | vivid | * |
| Openssh | Ubuntu | vivid/stable-phone-overlay | * |
| Openssh | Ubuntu | vivid/ubuntu-core | * |