=============================================================================== Security Advisory CERT-NL =============================================================================== Author/Source : Erik-Jan Bos (CERT-NL) Index : S-92-25 Distribution : SURFnet constituency Page : 1 Classification: External Version: Final Subject : ConvexOS & ConvexOS/Secure Vulnerabilities Date : 17-dec-92 =============================================================================== CERT-NL has received information from The CERT Coordination Center concerning several vulnerabilities in the following CONVEX Computer Corporation products: ConvexOS/Secure, CONVEX CXbatch, CONVEX Storage Manager (CSM), and ConvexOS EMACS. These vulnerabilities can affect ConvexOS versions V6.2 - V10.2 and ConvexOS/Secure versions V9.5 and V10.0 on all supported architectures. CONVEX is aware of the vulnerabilities, and fixes or workarounds are available. Three of the fixes are implemented as full Engineering Change Notice (ECN) patches and, as such, will be shipped with all new systems as well as being released as upgrades for the products CXbatch, CSM and ConvexOS/Secure. There is a workaround available for the ConvexOS EMACS vulnerability. CONVEX is currently incorporating the fixes to these vulnerabilities into future releases of each product. Future shipments of these products should not be vulnerable to these problems. If you have any questions about the affected products, please contact Convex Nederland at 030-888368 (ask for the Technical Department or in Dutch "de Technische Afdeling") or email Convex Nederland at "help@convex.nl". ----------------------------------------------------------------------------- ConvexOS/Secure: passwd patch I. Description The "passwd" command in ConvexOS/Secure contains a security vulnerability in versions V9.5 and V10.0 of ConvexOS/Secure. This vulnerability has been fixed in ConvexOS/Secure V10.1. II. Impact Local users can gain unauthorized root access. III. Solution Obtain and install ConvexOS/Secure V10.0.2 - Part No. 710-007815-008. ------------------------------------------------------------------------------ Convex CXbatch: qmgr patch I. Description The "qmgr" command in CONVEX CXbatch versions V1.0 - V2.1.3 contains a security vulnerability. This vulnerability is present in ConvexOS V6.2 - V10.2 on systems that have installed the optional CXbatch facility. II. Impact Local users can gain unauthorized root access. III. Solution A. As root, rename the existing version of /usr/convex/qmgr and modify the permission (from 6755 to 700) to prevent misuse. # /bin/mv /usr/convex/qmgr /usr/convex/qmgr.orig # /bin/chmod 700 /usr/convex/qmgr.orig B. Next, obtain and install CONVEX CXbatch V2.1.4 - Part No. 710-007830-011. ------------------------------------------------------------------------------ Convex CSM: migmgr patch I. Description The "migmgr" command in CONVEX CSM contains a security vulnerability, in ConvexOS version V10.1 of systems that have installed the CSM facility. This vulnerability will be fixed in the next CSM release. II. Impact Local users can gain unauthorized root access. III. Solution A. As root, rename the existing version of /usr/csm/bin/migmgr and modify the permission (from 4755 to 700) to prevent misuse. # /bin/mv /usr/csm/bin/migmgr /usr/csm/bin/migmgr.orig # /bin/chmod 700 /usr/csm/bin/migmgr.orig B. Next, obtain and install CONVEX CSM V1.0.1 - Part No. 710-011315-003 ------------------------------------------------------------------------------ ConvexOS: EMACS editor workaround I. Description The EMACS Editor in ConvexOS contains a security vulnerability, in ConvexOS versions V9.0 - V10.2. II. Impact Local users can gain unauthorized access to /dev/kmem. III. Solution As root, remove the setgid bit from /usr/convex/emacs. # /bin/chmod 755 /usr/convex/emacs ------------------------------------------------------------------------------ The CERT Coordination Center wishes to thank the CONVEX Computer Corporation for their response to these problems. We would also like to thank Bob Vickers from the University of London Computer Centre, London, England, for reporting the CXbatch problem to us. ------------------------------------------------------------------------------ CERT-NL wishes to thank The CERT Coordination Center for making this information available. Furthermore, CERT-NL wishes to thank Convex Nederland for supplying local contact information. ============================================================================== CERT-NL is the Computer Emergency Response Team, located in The Netherlands. CERT-NL is a Full Member of the Forum of Incident Response and Security Teams (FIRST). The constituency of CERT-NL are the SURFnet connected institutions. Past CERT-NL Security Bulletins and other CERT-NL related material can be found on the anonymous FTP server of SURFnet bv: "ftp.nic.surfnet.nl" [192.87.46.3], in the directory "netman/cert-nl". This information is also available using email. Send an email saying "help" to "mailserv@nic.surfnet.nl". In case of computer or network security problems please contact CERT-NL or the CERT of your own constituency. Please be aware of the fact that we are are one hour ahead of Universal Time Coordinated (i.e. UTC+0100). Email: cert-nl@surfnet.nl Phone: +31 30 310290 Fax: +31 30 340903 Snailmail: SURFnet bv Attn. CERT-NL P.O. Box 19035 NL - 3501 DA UTRECHT The Netherlands A 7*24h phonenumber is available to SURFnet SSC's and FIRST members on request ==============================================================================