xsok - missing privilege release

Steve Kemp discovered a problem in xsok, a single player strategy game
for X11, related to the Sokoban game, which leads a user to execute
arbitrary commands under the GID of games.

For the stable distribution (woody) this problem has been fixed in
version 1.02-9woody2.

For the unstable distribution (sid) this problem has been fixed in
version 1.02-11.

We recommend that you upgrade your xsok package.