Red Hat Linux General Security Advisory

Red Hat, Inc. Security Advisory Synopsis esound contains a race condition Advisory ID RHSA-2000:077-03 Issue Date 2000-10-06 Updated On 2000-10-06 Product Red Hat Linux Keywords esound security esd socket Gnome Cross References N/A 1. Topic: Esound, the Gnome sound server, contains a race condition that a malicious user could exploit to change permissions of any file owned by the esound user. 2. Problem description: Esound, the sound daemon used for Gnome, creates a world-writable directory, /tmp/.esd. This directory is owned by the user running esound, and is used to store a socket which is used by programs connecting to the sound server. During startup, this socket's permissions are adjusted. An attacker on the system can theoretically create a symbolic link, and cause any file or directory owned by the user running esound to be made world writable. The new packages fixes this race condition. 3. Bug IDs fixed: (see bugzilla for more information) N/A - 4. Relevant releases/architectures: Red Hat Linux 6.0 - i386, alpha, sparc Red Hat Linux 6.1 - i386, alpha, sparc Red Hat Linux 6.2 - i386, alpha, sparc Red Hat Linux 6.2EE - i386, alpha, sparc Red Hat Linux 7.0 - i386 Red Hat Linux 7.0J - i386 5. RPMs required: Red Hat Linux 6.x: alpha: ftp://updates.redhat.com/6.2/en/os/alpha/esound-0.2.20-0.alpha.rpm ftp://updates.redhat.com/6.2/en/os/alpha/esound-devel-0.2.20-0.alpha.rpm sparc: ftp://updates.redhat.com/6.2/en/os/sparc/esound-0.2.20-0.sparc.rpm ftp://updates.redhat.com/6.2/en/os/sparc/esound-devel-0.2.20-0.sparc.rpm i386: ftp://updates.redhat.com/6.2/en/os/i386/esound-0.2.20-0.i386.rpm ftp://updates.redhat.com/6.2/en/os/i386/esound-devel-0.2.20-0.i386.rpm sources: ftp://updates.redhat.com/6.2/en/os/SRPMS/esound-0.2.20-0.src.rpm Red Hat Linux 7.0: i386: ftp://updates.redhat.com/7.0/en/os/i386/esound-0.2.20-1.i386.rpm ftp://updates.redhat.com/7.0/en/os/i386/esound-devel-0.2.20-1.i386.rpm sources: ftp://updates.redhat.com/7.0/en/os/SRPMS/esound-0.2.20-1.src.rpm 6. Solution: For each RPM for your particular architecture, run: rpm -Fvh [filename] where filename is the name of the RPM. All active Gnome sessions should also be restarted after the upgrade is applied. 7. Verification: MD5 sum Package Name ------------------------------------------------------------------------- 4f7a81fe6b7f5a419272659b92d1dfc1 6.2/en/os/SRPMS/esound-0.2.20-0.src.rpm 648746086daa7bbc6bef00697e62bf51 6.2/en/os/alpha/esound-0.2.20-0.alpha.rpm 8a7dbf7dabbd7d9ca2861c1ecf2b2d5f 6.2/en/os/alpha/esound-devel-0.2.20-0.alpha.rpm 962fa1129804f2d8470e1767a352f77f 6.2/en/os/i386/esound-0.2.20-0.i386.rpm 784ec77026228d31d823e619c1de78d8 6.2/en/os/i386/esound-devel-0.2.20-0.i386.rpm 2127fdd7654b80506952dce08c3f5014 6.2/en/os/sparc/esound-0.2.20-0.sparc.rpm 0c191eee05a89dc0d12b3ca4981d2353 6.2/en/os/sparc/esound-devel-0.2.20-0.sparc.rpm 24f8e1b106500565e8426ad96150a001 7.0/en/os/SRPMS/esound-0.2.20-1.src.rpm a61209acb87ed7f4fa5b1d63d161c85d 7.0/en/os/i386/esound-0.2.20-1.i386.rpm 6b326c66d570ee59eda7c2daf0ab4721 7.0/en/os/i386/esound-devel-0.2.20-1.i386.rpm These packages are GPG signed by Red Hat, Inc. for security. Our key is available at: http://www.redhat.com/about/contact.html You can verify each package with the following command: rpm --checksig filename 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 filename Note that you need RPM >= 3.0 to check GnuPG keys. 8. References: BugTraq ID: 1659 (http://www.securityfocus.com/bid/1659)