From bugzilla@redhat.com Wed Jan 15 23:25:40 2003 From: bugzilla@redhat.com To: redhat-watch-list@redhat.com, redhat-announce-list@redhat.com Date: Tue, 7 Jan 2003 04:13 -0500 Subject: [RHSA-2002:283-09] Updated cyrus-sasl packages fix buffer overflows [ 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: Updated cyrus-sasl packages fix buffer overflows Advisory ID: RHSA-2002:283-09 Issue date: 2003-01-07 Updated on: 2003-01-06 Product: Red Hat Linux Keywords: cyrus-sasl buffer overflow flaw:buf Cross references: Obsoletes: RHSA-2001:150 CVE Names: CAN-2002-1347 --------------------------------------------------------------------- 1. Topic: Updated cyrus-sasl packages are now available for Red Hat Linux 8.0. These packages close buffer overflows present in Cyrus SASL 2.1 and later. 2. Relevant releases/architectures: Red Hat Linux 8.0 - i386 3. Problem description: Cyrus SASL is an implementation of the Simple Authentication and Security Layer, a method for adding authentication support to connection-based protocols. Cyrus SASL versions 2 prior to 2.1.10 include a number of buffer overflow vulnerabilities: Insufficient buffer length checking in user name canonicalization. This issue would be hard to exploit, but would allow a remote user to execute arbitrary code on the system. When performing authentication using LDAP, saslauthd does not allocate enough memory when it needs to escape special characters in the username and realm. This issue may be easy to remotely exploit. The Log writer might not have allocated memory for the trailing \0 in a message. This issue is probably hard to exploit, although it is possible to affect the logging data with at least anonymous authentication. All users of Cyrus-SASL on Red Hat Linux 8.0 are advised to upgrade to the erratum packages containing Cyrus SASL version 2.1.10 which is not affected by these vulnerabilities. Other Red Hat Linux releases are not affected by this vulnerability as they included Cyrus-SASL version 1.5.x. 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. RPMs required: Red Hat Linux 8.0: SRPMS: ftp://updates.redhat.com/8.0/en/os/SRPMS/cyrus-sasl-2.1.10-1.src.rpm i386: ftp://updates.redhat.com/8.0/en/os/i386/cyrus-sasl-2.1.10-1.i386.rpm ftp://updates.redhat.com/8.0/en/os/i386/cyrus-sasl-devel-2.1.10-1.i386.rpm ftp://updates.redhat.com/8.0/en/os/i386/cyrus-sasl-gssapi-2.1.10-1.i386.rpm ftp://updates.redhat.com/8.0/en/os/i386/cyrus-sasl-md5-2.1.10-1.i386.rpm ftp://updates.redhat.com/8.0/en/os/i386/cyrus-sasl-plain-2.1.10-1.i386.rpm 6. Verification: MD5 sum Package Name -------------------------------------------------------------------------- e291b7bd71cd69825077aba5a3341764 8.0/en/os/SRPMS/cyrus-sasl-2.1.10-1.src.rpm 0bf0d5b2e17a26e06f1b9e2cd02fdae3 8.0/en/os/i386/cyrus-sasl-2.1.10-1.i386.rpm 80d77339fc5a06bed5073cd34019d9f4 8.0/en/os/i386/cyrus-sasl-devel-2.1.10-1.i386.rpm 877a229ffe46aa7be012f8d69fa1d544 8.0/en/os/i386/cyrus-sasl-gssapi-2.1.10-1.i386.rpm 8568b99569bceb11d237fd302d372113 8.0/en/os/i386/cyrus-sasl-md5-2.1.10-1.i386.rpm bc69bfc361c0c75c15be0d7557133633 8.0/en/os/i386/cyrus-sasl-plain-2.1.10-1.i386.rpm These packages are GPG signed by Red Hat, Inc. for security. Our key is available at http://www.redhat.com/about/contact/pgpkey.html You can verify each package with the following command: rpm --checksig -v If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: md5sum 7. References: http://marc.theaimsgroup.com/?l=cyrus-sasl&m=103945455024946 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1347 8. Contact: The Red Hat security contact is . More contact details at http://www.redhat.com/solutions/security/news/contact.html Copyright(c) 2000, 2001, 2002 Red Hat, Inc.