Akira Yoshiyama noticed that ipmenu, an cursel iptables/iproute2 GUI, creates a temporary file in an insecure fashion allowing a local attacker to overwrite arbitrary files utilising a symlink attack.
For the old stable distribution (woody) this problem has been fixed in version 0.0.3-4woody1
The stable distribution (sarge) does not contain the ipmenu package.
For the unstable distribution (sid) this problem has been fixed in version 0.0.3-5.
We recommend that you upgrade your ipmenu package.