It was discovered that there was a path traversal vulnerability in jsch, a pure Java implementation of the SSH2 protocol.

For Debian 8 Jessie, this problem has been fixed in version 0.1.51-1+deb8u1.

We recommend that you upgrade your jsch packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS