From bugzilla@redhat.com Wed Jun 13 13:59:02 2001 From: bugzilla@redhat.com To: redhat-watch-list@redhat.com Cc: bugtraq@securityfocus.com, linux-security@redhat.com Date: Tue, 12 Jun 2001 16:29 -0400 Subject: [RHSA-2001:077-05] LPRng fails to drop supplemental group membership [The following text is in the "iso-8859-1" character set] [Your display is set for the "US-ASCII" character set] [Some characters may be displayed incorrectly] --------------------------------------------------------------------- Red Hat, Inc. Red Hat Security Advisory Synopsis: LPRng fails to drop supplemental group membership Advisory ID: RHSA-2001:077-05 Issue date: 2001-06-07 Updated on: 2001-06-11 Product: Red Hat Linux Keywords: LPRng groups Cross references: Obsoletes: RHBA-2001:039-05 RHSA-2000:065-06 --------------------------------------------------------------------- 1. Topic: When LPRng drops uid and gid, it fails to drop membership in its supplemental groups. 2. Relevant releases/architectures: Red Hat Linux 7.0 - alpha, i386 Red Hat Linux 7.1 - i386 3. Problem description: LPRng fails to drop supplemental group membership at init time, though it does properly setuid and setgid. The result is that LPRng, and its children, maintain any supplemental groups that the process starting LPRng had at the time it started LPRng. This is a security risk. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. To update all RPMs for your particular architecture, run: rpm -Fvh [filenames] where [filenames] is a list of the RPMs you wish to upgrade. Only those RPMs which are currently installed will be updated. Those RPMs which are not installed but included in the list will not be updated. Note that you can also use wildcards (*.rpm) if your current directory *only* contains the desired RPMs. Please note that this update is also available via Red Hat Network. Many people find this an easier way to apply updates. To use Red Hat Network, launch the Red Hat Update Agent with the following command: up2date This will start an interactive process that will result in the appropriate RPMs being upgraded on your system. 5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info): 43341 - lpd fails to drop groups of root 6. RPMs required: Red Hat Linux 7.0: SRPMS: ftp://updates.redhat.com/7.0/en/os/SRPMS/LPRng-3.7.4-23.src.rpm alpha: ftp://updates.redhat.com/7.0/en/os/alpha/LPRng-3.7.4-23.alpha.rpm i386: ftp://updates.redhat.com/7.0/en/os/i386/LPRng-3.7.4-23.i386.rpm Red Hat Linux 7.1: SRPMS: ftp://updates.redhat.com/7.1/en/os/SRPMS/LPRng-3.7.4-23.src.rpm i386: ftp://updates.redhat.com/7.1/en/os/i386/LPRng-3.7.4-23.i386.rpm 7. Verification: MD5 sum Package Name -------------------------------------------------------------------------- 9a9a148f44c80cb83a1cc53b7fc60492 7.0/en/os/SRPMS/LPRng-3.7.4-23.src.rpm 3a83c1cdf9eef8bbc72bd511264a0fc3 7.0/en/os/alpha/LPRng-3.7.4-23.alpha.rpm 23e85c03c49b6d1eda0a76428f181dc5 7.0/en/os/i386/LPRng-3.7.4-23.i386.rpm 9a9a148f44c80cb83a1cc53b7fc60492 7.1/en/os/SRPMS/LPRng-3.7.4-23.src.rpm 23e85c03c49b6d1eda0a76428f181dc5 7.1/en/os/i386/LPRng-3.7.4-23.i386.rpm These packages are GPG signed by Red Hat, Inc. for security. Our key is available at: http://www.redhat.com/corp/contact.html You can verify each package with the following command: rpm --checksig If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: rpm --checksig --nogpg 8. References: Copyright(c) 2000, 2001 Red Hat, Inc.