LutelWall is vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files.
|Package||net-firewall/lutelwall on all architectures|
|Affected versions||< 0.98|
|Unaffected versions||>= 0.98|
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 version.
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:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-firewall/lutelwall-0.98"
June 11, 2005
June 11, 2005: 01