CVE-2023-6004: Fedoraproject Fedora

Medium severity, CVSS 4.8. EPSS: 0.4% chance of exploitation in the next 30 days.

A flaw was found in libssh. By utilizing the ProxyCommand or ProxyJump feature, users can exploit unchecked hostname syntax on the client. This issue may allow an attacker to inject malicious code into the command of the features mentioned through the hostname parameter.

Affected products

• Fedoraproject Fedora: version 38 only
• Libssh Libssh: from 0.8.0, before 0.9.8 (fixed in 0.9.8); from 0.10.0, before 0.10.6 (fixed in 0.10.6)
• Red Hat Enterprise Linux: version 8.0 only; version 9.0 only

Published 2024-01-03. Last modified 2026-06-17.