===================================================================== CERT-Renater Note d'Information No. 2003/VULN187 _____________________________________________________________________ DATE : 02/05/2003 HARDWARE PLATFORM(S) : HP 9000 Series 700 and 800 OPERATING SYSTEM(S) : HP-UX 10.20 and 11.00. ====================================================================== ----------------------------------------------------------------- Source: HEWLETT-PACKARD COMPANY SECURITY BULLETIN: HPSBUX0304-257 Originally issued: 29 April 2003 SSRT3496 Potential Security Vulnerability in rexec ----------------------------------------------------------------- NOTICE: There are no restrictions for distribution of this Bulletin provided that it remains complete and intact. The information in the following Security Bulletin should be acted upon as soon as possible. Hewlett-Packard Company will not be liable for any consequences to any customer resulting from customer's failure to fully implement instructions in this Security Bulletin as soon as possible. ----------------------------------------------------------------- PROBLEM: Potential buffer overflow in rexec(1) IMPACT: Potential increase in privilege. PLATFORM: HP 9000 Series 700 and 800 10.20 and 11.00. SOLUTION: 10.20 - replace libc.1 file. 11.00 - install PHCO_24723 or subsequent. MANUAL ACTIONS: Yes - NonUpdate AVAILABILITY: This bulletin will be updated when a 10.20 patch is available. ----------------------------------------------------------------- A. Background The SSRT thanks Davide Del Vecchio for reporting this potential vulnerability to HP. HP Tru64 UNIX is not vulnerable to this reported problem. B. Recommended solution 11.00 - Install PHCO_24723 or subsequent. PHCO_24723 has been superseded. To find the recommended superseding patch and the latest superseding patch, search the technical knowledge base on itrc.hp.com for "PHCO_24723". 10.20 - Download and install libc.1.10.20 as described below. Note: This libc.1.10.20 also has the fixes for the potential vulnerabilities mentioned in HPSBUX0208-209 and HPSBUX0303-252. System: hprc.external.hp.com (192.170.19.51) Login: rexec Password: rexec Browser ftp access: ftp://rexec:rexec@hprc.external.hp.com/ ftp://rexec:rexec@192.170.19.51/ Note: There is an ftp defect in IE5 that may result in a browser hang. To work around this: Select Tools -> Internet Options -> Advanced Un-check the option: [ ] Enable folder view for FTP sites If you wish to verify the md5 sum please refer to: HPSBUX9408-016 Patch sums and the MD5 program Download libc.1.10.20.gz and unpack with gunzip. Verify the cksum or md5 sum. cksum: 2506697268 1867776 libc.1.10.20 MD5 (libc.1.10.20) = cabd081cee3e980d7f3075bb7c6a505d Go to init state 2 #DIR=[path to new libc.1] #cd /usr/lib #cp libc.1 libc.1.orig #cp $DIR/libc.1.10.20 libc.1.new #chown bin libc.1.new #chgrp bin libc.1.new #chmod 555 libc.1.new #/sbin/mv libc.1 was.libc.1 #/sbin/mv libc.1.new libc.1 Reboot the system. C. To subscribe to automatically receive future NEW HP Security Bulletins from the HP IT Resource Center via electronic mail, do the following: Use your browser to get to the HP IT Resource Center page at: http://itrc.hp.com Use the 'Login' tab at the left side of the screen to login using your ID and password. Use your existing login or the "Register" button at the left to create a login, in order to gain access to many areas of the ITRC. Remember to save the User ID assigned to you, and your password. In the left most frame select "Maintenance and Support". Under the "Notifications" section (near the bottom of the page), select "Support Information Digests". To -subscribe- to future HP Security Bulletins or other Technical Digests, click the check box (in the left column) for the appropriate digest and then click the "Update Subscriptions" button at the bottom of the page. or To -review- bulletins already released, select the link (in the middle column) for the appropriate digest. NOTE: Using your itrc account security bulletins can be found here: http://itrc.hp.com/cki/bin/doc.pl/screen=ckiSecurityBulletin To -gain access- to the Security Patch Matrix, select the link for "The Security Bulletins Archive". (near the bottom of the page) Once in the archive the third link is to the current Security Patch Matrix. Updated daily, this matrix categorizes security patches by platform/OS release, and by bulletin topic. Security Patch Check completely automates the process of reviewing the patch matrix for 11.XX systems. Please note that installing the patches listed in the Security Patch Matrix will completely implement a security bulletin _only_ if the MANUAL ACTIONS field specifies "No." The Security Patch Check tool can verify that a security bulletin has been implemented on HP-UX 11.XX systems providing that the fix is completely implemented in a patch with no manual actions required. The Security Patch Check tool cannot verify fixes implemented via a product upgrade. For information on the Security Patch Check tool, see: http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/ displayProductInfo.pl?productNumber=B6834AA The security patch matrix is also available via anonymous ftp: ftp://ftp.itrc.hp.com/export/patches/hp-ux_patch_matrix/ On the "Support Information Digest Main" page: click on the "HP Security Bulletin Archive". The PGP key used to sign this bulletin is available from several PGP Public Key servers. The key identification information is: 2D2A7D59 HP Security Response Team (Security Bulletin signing only) Fingerprint = 6002 6019 BFC1 BC62 F079 862E E01F 3AFC 2D2A 7D59 If you have problems locating the key please write to security-alert@hp.com. Please note that this key is for signing bulletins only and is not the key returned by sending 'get key' to security-alert@hp.com. D. To report new security vulnerabilities, send email to security-alert@hp.com Please encrypt any exploit information using the security-alert PGP key, available from your local key server, or by sending a message with a -subject- (not body) of 'get key' (no quotes) to security-alert@hp.com. ----------------------------------------------------------------- (c)Copyright 2003 Hewlett-Packard Company Hewlett-Packard Company shall not be liable for technical or editorial errors or omissions contained herein. The information in this document is subject to change without notice. Hewlett-Packard Company and the names of HP products referenced herein are trademarks and/or service marks of Hewlett-Packard Company. Other product and company names mentioned herein may be trademarks and/or service marks of their respective owners. ________________________________________________________________ ====================================================================== ========================================================= Les serveurs de référence du CERT-Renater http://www.urec.fr/securite http://www.cru.fr/securite http://www.renater.fr ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 151 bd de l'Hopital | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================