libssh: Arbitrary command execution

Background

libssh is a multiplatform C library implementing the SSHv2 protocol on client and server side.

Description

It was discovered that libssh incorrectly handled certain scp commands.

Impact

A remote attacker could trick a victim into using a specially crafted scp command, possibly resulting in the execution of arbitrary commands on the server.

Workaround

There is no known workaround at this time.

Resolution

All libssh users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-libs/libssh-0.9.3"