It was discovered that there was a directory traversal attack in pip, the Python package installer.
When an URL was given in an install command, as a
header was permitted to have
../ components in its filename, arbitrary local
/root/.ssh/authorized_keys) could be overidden.
For Debian 8 Jessie, these problems have been fixed in version 1.5.6-5+deb8u1.
We recommend that you upgrade your python-pip packages.
Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/