A flaw was found in libssh

Overview

A flaw was found in libssh. During SFTP server directory listing, the longname field is constructed with unsafe concatenation into a fixed-size stack buffer. When a client causes the server to list attacker-controlled filenames, sufficiently long names can overflow that stack buffer and may lead to crashes or possible code execution on the server.

Affected

• libssh >= 0.11.0, < 0.11.5
• libssh = 0.12.0
• hardened_images
• enterprise_linux = 10.0
• enterprise_linux = 10.2
• enterprise_linux_for_els = 10.2
• enterprise_linux_for_eus = 10.2
• enterprise_linux_for_ibm_z_systems = 10.0
• enterprise_linux_for_ibm_z_systems = 10.2
• enterprise_linux_for_ibm_z_systems_els = 10.2
• enterprise_linux_for_ibm_z_systems_eus = 10.2
• enterprise_linux_for_power_little_endian = 10.0
• enterprise_linux_for_power_little_endian = 10.2
• enterprise_linux_for_power_little_endian_els = 10.2
• enterprise_linux_for_power_little_endian_eus = 10.2

Remediation

Upgrade past the affected range:

• libssh 0.11.5