osc: code execution

From the Red Hat bugzilla entry:

A security flaw was found in the way osc, the Python language based command line client for the openSUSE build service, displayed build logs and build status for particular build. A rogue repository server could use this flaw to modify window's title, or possibly execute arbitrary commands or overwrite files via a specially-crafted build log or build status output containing an escape sequence for a terminal emulator.