From security-advisories@FreeBSD.org Wed Apr 25 00:05:53 2001 From: FreeBSD Security Advisories To: BUGTRAQ@SECURITYFOCUS.COM Date: Mon, 23 Apr 2001 20:25:42 -0700 Subject: [BUGTRAQ] FreeBSD Security Advisory FreeBSD-SA-01:38.sudo -----BEGIN PGP SIGNED MESSAGE----- ============================================================================= FreeBSD-SA-01:38 Security Advisory FreeBSD, Inc. Topic: sudo contains local buffer overflow Category: ports Module: sudo Announced: 2001-04-23 Credits: Chris Wilson Affects: Ports collection prior to the correction date. Corrected: 2001-03-07 Vendor status: Updated version released FreeBSD only: NO I. Background sudo is a program that allowss a sysadmin to give limited root privileges to users and logs root activity. II. Problem Description The sudo port, versions prior to sudo-1.6.3.7, contains a local command-line buffer overflow allowing a local user to potentially gain increased privileges on the local system. The sudo 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 5000 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. The ports collection that shipped with FreeBSD 4.3 is not vulnerable since this problem was corrected prior to the release. 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 Local users may potentially gain increased privileges on the local system. If you have not chosen to install the sudo port/package, then your system is not vulnerable to this problem. IV. Workaround Deinstall the sudo port/package if you have installed it. V. Solution One of the following: 1) Upgrade your entire ports collection and rebuild the sudo port. 2) Deinstall the old package and install a new package dated after the correction date, obtained from: [i386] ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/security/sudo-1.6.3.7.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/security/sudo-1.6.3.7.tgz [alpha] Packages are not automatically generated for the alpha architecture at this time due to lack of build resources. 3) download a new port skeleton for the sudo port from: http://www.freebsd.org/ports/ and use it to rebuild the port. 4) Use the portcheckout utility to automate option (3) 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: FreeBSD: The Power To Serve iQCVAwUBOuTqtlUuHi5z0oilAQGsKQP9HXFq79DNvBXkV+03EadLPoJV1gwzG2lp KCJeMOhMc2pKgPcGIxMQ9bmLC7gI+xkr2XrjEpsUnYHCoBS2F7Jd9gKQZNLvGqVy r2hCiTKcg1rObIYML4cghlo12Ppe7saxXszBmNa4VnHZwC4ksuREvZWJc+jKJ5oz zybz712C8iQ= =CQtP -----END PGP SIGNATURE-----