LutelWall: Insecure temporary file creation
Gentoo Linux Security Advisory
||GLSA 200506-10 / LutelWall
||June 11, 2005
||June 11, 2005: 01
All supported architectures
LutelWall is vulnerable to symlink attacks, potentially allowing a local
user to overwrite arbitrary files.
LutelWall is a high-level Linux firewall configuration tool.
Eric Romang has discovered that the new_version_check() function
in LutelWall insecurely creates a temporary file when updating to a new
A local attacker could create symbolic links in the temporary file
directory, pointing to a valid file somewhere on the filesystem. When
the update script is executed (usually by the root user), this would
result in the file being overwritten with the rights of this user.
There is no known workaround at this time.
All LutelWall users should upgrade to the latest version:
Code Listing 3.1: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-firewall/lutelwall-0.98"