============================================================================= SA-94.02 SERT Advisory 27-May-1994 Ultrix, DECnet-Ultrix, OSF/1 vulnerabilities ----------------------------------------------------------------------------- The Security Emergency Response Team has received information from Digital Equipment Corporation concerning a security vulnerability in several versions of the ULTRIX operating system. The entire DEC bulletin is reproduced verbatim below, as per the company's request. ADVISORY INFORMATION: SUBJECT: Security Enhanced Kit for ULTRIX V4.3 (VAX/RISC), ULTRIX V4.3A (RISC), ULTRIX V4.4, ULTRIX Worksystem Software and DEC OSF/1 V1.2 - V2.0 Operating Systems. IMPACT: Potential security vulnerabilities exist where, under certain circumstances user access or privilege may be expanded. SOLUTION: ULTRIX: Upgrade/Install ULTRIX to V4.4 and install the Security Enhanced Kit DEC OSF/1: Upgrade/Install to a minimum of V1.2 and install the Security Enhanced Kit or Upgrade to V3.0 _____________________________________________________________________ These kits are available from Digital Equipment Corporation by con- tacting your normal Digital support channel or by request via DSNlink for electronic transfer. ***************************************************************** The kits are packaged for the affected versions by operating system type (ULTRIX and DEC OSF/1) ***************************************************************** _____________________________________________________________________ IMPACT: Digital has discovered the existence of potential security vulnerabi- lities in the ULTRIX V4.3, V4.3a, V4.4 and DEC OSF/1 V1.2, V1.3, V2.0 Operating Systems, and DECnet-ULTRIX V4.2. These potential vulnerabi- lities were discovered as a result of evaluating recent reports of potential security vulnerabilities which were distributed on the INTERNET and as a result of Digitals continued engineering efforts. The solutions to these vulnerabilities have been included in the next release of ULTRIX and the current release DEC OSF/1 V3.0. The kits have been created to correct potential security vulnerabili- ties which, under certain circumstances may expand user access or privilege. Digital Equipment Corporation strongly urges Customers to upgrade to a minimum of ULTRIX V4.4 and DEC OSF/1 V2.0 then apply the Security Enhanced Kit. - Please refer to the applicable Release Note information prior to upgrading your installation. *************************************************************** These kits will not install on versions previous to ULTRIX V4.3 or DEC OSF/1 V1.2. *************************************************************** _____________________________________________________________________ KIT PART NUMBERS and DESCRIPTIONS AV-Q81EA-TE ULTRIX V4.3 thru V4.4 CSCPAT_4060 V1.0 AV-Q80VA-TE DEC OSF/1 V1.2 thru V2.0 CSCPAT_4061 V1.0 Including DECnet V4.2(only) _____________________________________________________________________ The ULTRIX Security Enhanced kit replaces the following images: /usr/etc/comsat ULTRIX V4.3, V4.3a, V4.4 /usr/ucb/lpr " " /usr/ucb/mail " " /usr/lib/sendmail " " /usr/etc/telnetd ULTRIX V4.3, V4.3a only ______________________________________ for ULTRIX - DECnet V4.2 installations /usr/etc/dlogind /usr/etc/telnetd.gw *sendmail - is a previously distributed solution. _____________________________________________________________________ The DEC OSF/1 Security Enhanced kit replaces the following images: /usr/sbin/comsat DEC OSF/1 V1.2, V1.3 V2.0 /usr/bin/lpr " " /usr/bin/rdist " " /usr/sbin/sendmail DEC OSF/1 V1.2, V1.3 only /usr/shlib/libsecurity.so DEC OSF/1 V2.0 only *sendmail - is a previously distributed solution. _____________________________________________________________________ Digital urges you to periodically review your system management and security procedures. Digital will continue to review and enhance the security features of its products and work with customers to maintain and improve the security and integrity of their systems. _____________________________________________________________________ NOTE: For non-contract/non-warranty customers contact your local Digital support channels for information regarding these kits. ---------------------------------------------------------------------------- The SERT team wishes to thank Rich Boren of DEC's Software Security Response Team (SSRT) and Andrew Rutherford of Adelaide University for their advice and cooperation in this matter. ---------------------------------------------------------------------------- If you believe that your system has been compromised, contact SERT or your representative in FIRST (Forum of Incident Response and Security Teams). Internet Email: sert@sert.edu.au Facsimile: (07) 365 4477 SERT Hotline: (07) 365 4417 SERT personnel answer during business hours (AEST - GMT+10:00). (On call after hours for emergencies). Security Emergency Response Team c/- Prentice Centre The University of Queensland Qld. 4072. Australia.