CVE-2019-3857

Name of the Vulnerable Software and Affected Versions libssh2 versions prior to 1.8.1

Description The issue is related to an integer overflow flaw in the way SSH MSG CHANNEL REQUEST packets with an exit signal are parsed. This could lead to an out of bounds write, allowing a remote attacker who compromises a SSH server to potentially execute code on the client system when a user connects to the server. The vulnerability can be exploited by a remote attacker to execute arbitrary code in the client system upon connection to the server.

Recommendations For libssh2 versions prior to 1.8.1, update to version 1.8.1 or later to resolve the issue. As a temporary workaround, consider restricting access to SSH servers until the update can be applied.