Joined: 12 May 2004
|Posted: Sat Jun 11, 2005 7:31 pm Post subject: [ GLSA 200506-10 ] LutelWall: Insecure temporary file creati
|Gentoo Linux Security Advisory
Title: LutelWall: Insecure temporary file creation (GLSA 200506-10)
Date: June 11, 2005
LutelWall is vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files.
LutelWall is a high-level Linux firewall configuration tool.
Vulnerable: < 0.98
Unaffected: >= 0.98
Architectures: All supported architectures
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"
Last edited by GLSA on Sun May 07, 2006 4:57 pm; edited 1 time in total