From security-advisories@freebsd.org Thu Dec 21 02:00:49 2000 From: FreeBSD Security Advisories To: BUGTRAQ@SECURITYFOCUS.COM Date: Wed, 20 Dec 2000 07:02:23 -0800 Subject: [BUGTRAQ] FreeBSD Ports Security Advisory: FreeBSD-SA-00:80.halflifeserver -----BEGIN PGP SIGNED MESSAGE----- ============================================================================= FreeBSD-SA-00:80 Security Advisory FreeBSD, Inc. Topic: halflifeserver allows remote code execution Category: ports Module: halflifeserver Announced: 2000-12-20 Credits: Mark Cooper Affects: Ports collection prior to the correction date. Corrected: 2000-11-29 Vendor status: Updated version released FreeBSD only: NO I. Background halflifeserver is a dedicated server for hosting Half-Life games. II. Problem Description The halflifeserver port, versions prior to 3.1.0.4, contains local and remote vulnerabilities through buffer overflows and format string vulnerabilities. These vulnerabilities may allow remote users to execute arbitrary code as the user running halflifeserver. The halflifeserver port is not installed by default, nor is it "part of FreeBSD" as such: it is part of the FreeBSD ports collection, which contains over 4200 third-party applications in a ready-to-install format. The ports collections shipped with FreeBSD 3.5.1 and 4.2 contain this problem since it was discovered after the releases. FreeBSD makes no claim about the security of these third-party applications, although an effort is underway to provide a security audit of the most security-critical ports. III. Impact Malicious remote users may execute arbitrary code as the user running the halflifeserver software. If you have not chosen to install the halflifeserver port/package, then your system is not vulnerable to this problem. IV. Workaround Deinstall the halflifeserver port/package, if you have installed it. V. Solution One of the following: 1) Upgrade your entire ports collection and rebuild the halflifeserver port. 2) download a new port skeleton for the halflifeserver port from: http://www.freebsd.org/ports/ and use it to rebuild the port. Due to license restrictions no binary package is provided for the halflifeserver port. 3) Use the portcheckout utility to automate option (2) above. The portcheckout port is available in /usr/ports/devel/portcheckout or the package can be obtained from: ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/devel/portcheckout-2.0.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/portcheckout-2.0.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/devel/portcheckout-2.0.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/portcheckout-2.0.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/devel/portcheckout-2.0.tgz -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.4 (FreeBSD) Comment: For info see http://www.gnupg.org iQCVAwUBOkDIQVUuHi5z0oilAQGcqQQApE+76gPjqdkQf9TvbGBThPxcSocU8F+N GHiBPzkrgVHqCLYee0sywsQ4KRg2awuq+sP6EcqLTfaIGLZqPgS4xNZ6gqOrrgLP wxvGdtlqgad5lXLEvs1uYwBmj+lTNteYWy6KC04za2rLHYdkZce21kyj+6preXZs trAQ2uVDvsM= =s4GT -----END PGP SIGNATURE-----