source: https://www.securityfocus.com/bid/67727/info

dpkg is prone to multiple directory-traversal vulnerabilities because it fails to sufficiently sanitize user-supplied input.

Exploiting these issues will allow local attackers to modify files outside the destination directory and possibly gain access to the system.

dpkg 1.3.0 is vulnerable; other versions may also be affected. 

,--- exploit.patch ---
Index: index/symlink/index-file
@@ -0,0 +1,1 @@
+Escaped
`---