Raphael Geissert discovered that uscan, a program to check for availability of new source code versions which is part of the devscripts package, runs Perl code downloaded from potentially untrusted sources to implement its URL and version mangling functionality. This update addresses this issue by reimplementing the relevant Perl operators without relying on the Perl interpreter, trying to preserve backwards compatibility as much as possible. For the old stable distribution , this problem has been fixed in version 2.9.26etch4. For the stable distribution , this problem has been fixed in version 2.10.35lenny6. For the unstable distribution , this problem will be fixed in version 2.10.54. We recommend that you upgrade your devscripts package.