CVE-2015-5352: OpenBSD OpenSSH

Medium severity, CVSS 4.3. EPSS: 5.4% chance of exploitation in the next 30 days.

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.

Affected products

• OpenBSD OpenSSH: up to and including 6.8

Published 2015-08-03. Last modified 2026-06-17.