CVE-2011-4675

The pathname canonicalization functionality in io/filesystem/filesystem.cc
in Widelands before 15.1 expands leading ~ (tilde) characters to
home-directory pathnames but does not restrict use of these characters in
strings received from the network, which might allow remote attackers to
conduct absolute path traversal attacks and overwrite arbitrary files via a
~ in a pathname that is used for a file transfer in an Internet game, a
different vulnerability than CVE-2011-1932.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=617960&gt;