From support_feedback@us-support.external.hp.com Tue Jul 3 13:12:33 2001 From: IT Resource Center Resent-From: patrick@pine.nl To: security_info@us-support.external.hp.com Resent-To: bugtraq@securityfocus.com Date: Tue, 3 Jul 2001 05:34:46 -0700 (PDT) Subject: security bulletins digest HP Support Information Digests =============================================================================== o IT Resource Center World Wide Web Service --------------------------------------------------- If you subscribed through the IT Resource Center and would like to be REMOVED from this mailing list, access the IT Resource Center on the World Wide Web at: http://www.itresourcecenter.hp.com/ Login using your IT Resource Center User ID and Password. Then select Support Information Digests (located under Maintenance and Support). You may then unsubscribe from the appropriate digest. =============================================================================== Digest Name: daily security bulletins digest Created: Tue Jul 3 3:00:03 PDT 2001 Table of Contents: Document ID Title --------------- ----------- HPSBUX0107-157 Security Vulnerability in CIFS/9000 Server #2 HPSBMP0107-012 Security Vulnerability in CIFS/9000 Server #2 The documents are listed below. ------------------------------------------------------------------------------- Document ID: HPSBUX0107-157 Date Loaded: 20010702 Title: Security Vulnerability in CIFS/9000 Server #2 ------------------------------------------------------------------------ HEWLETT-PACKARD COMPANY SECURITY ADVISORY: #0157, 3 July '01 ------------------------------------------------------------------------ The information in the following Security Advisory 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 Advisory as soon as possible. ------------------------------------------------------------------------ PROBLEM: CIFS/9000 Server (Samba) - use of certain configuration options may compromise system security. PLATFORM: HP 9000 servers running CIFS/9000 Server version A.01.07 or lower; HP 3000 servers running Samba/iX DAMAGE: Data may be appended to arbitrary files and devices SOLUTION: Remove offending configuration options to avoid vulnerability ------------------------------------------------------------------------ A. Background The NetBIOS name of remote clients is substituted into the "%m" macro wherever it occurs in the configuration file smb.conf. The use of contrived NetBIOS names may result in Samba using a file path outside of the intended Samba directories. This can be used to cause Samba to append data to important system files, which in turn can be used to compromise security on the server. B. Fixing the problem An immediate fix is to edit your smb.conf configuration file and remove all occurances of the macro "%m". Depending on the requirements of each site, other smb.conf macros may be suitable replacements. C. Workarounds The "log file" option is the most vulnerable to this redefinition problem. The sample configuration file supplied with CIFS/9000 Server contains the path "/var/opt/samba/log.%m" for this option. Using this default path does NOT create a vulnerability unless there happens to exist a subdirectory in /var/opt/samba which starts with the prefix "log.". Sites that chooose to maintain the use of the "%m" macro in the "log file" option should use the default value: /var/opt/samba/log.%m D. 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 Under the Maintenance and Support Menu: click on the "more..." link. Then - Use the 'Login' tab at the left side of the screen to login using your ID and password. Check with your system administrator to see if you have an existing login or use the "Register" button at the left to create a login. You will need to login in order to gain access to many areas of the ITRC. Remember to save the User ID assigned to you, and your password. 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. 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. For information on the Security Patch Check tool, see: http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/ displayProductInfo.pl?productNumber3DB6834AA" The security patch matrix is also available via anonymous ftp: ftp.itrc.hp.com:~ftp/export/patches/hp-ux_patch_matrix On the "Support Information Digest Main" page: click on the "HP Security Bulletin Archive". E. 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. Permission is granted for copying and circulating this Advisory to Hewlett-Packard (HP) customers (or the Internet community) for the purpose of alerting them to problems, if and only if, the Advisory is not edited or changed in any way, is attributed to HP, and provided such reproduction and/or distribution is performed for non-commercial purposes. Any other use of this information is prohibited. HP is not liable for any misuse of this information by any third party. ________________________________________________________________________ -----End of Document ID: HPSBUX0107-157-------------------------------------- Document ID: HPSBMP0107-012 Date Loaded: 20010702 Title: Security Vulnerability in CIFS/9000 Server #2 ------------------------------------------------------------------------ HEWLETT-PACKARD COMPANY SECURITY ADVISORY: #0012, 3 July '01 ------------------------------------------------------------------------ The information in the following Security Advisory 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 Advisory as soon as possible. ------------------------------------------------------------------------ PROBLEM: CIFS/3000 Server (Samba) - use of certain configuration options may compromise system security PLATFORM: All HP3000 MPE/iX servers running Samba/iX DAMAGE: Data may be appended to arbitrary files and devices SOLUTION: Remove offending configuration options to avoid vulnerability ------------------------------------------------------------------------ A. Background The NetBIOS name of remote clients is substituted into the "%m" macro wherever it occurs in the configuration file smb.conf. The use of contrived NetBIOS names may result in Samba using a file path outside of the intended Samba directories. This can be used to cause Samba to append data to important system files, which in turn can be used to compromise security on the server. B. Fixing the problem An immediate fix is to edit your smb.conf configuration file and remove all occurances of the macro "%m". Depending on the requirements of each site, other smb.conf macros may be suitable replacements. C. Workarounds The "log file" option is the most vulnerable to this redefinition problem. The sample configuration file supplied with CIFS/3000 Server contains the path "/var/opt/samba/log.%m" for this option. Using this default path does NOT create a vulnerability unless there happens to exist a subdirectory in /var/opt/samba which starts with the prefix "log.". Sites that chooose to maintain the use of the "%m" macro in the "log file" option should use the default value: /var/opt/samba/log.%m D. 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 Under the Maintenance and Support Menu: click on the "more..." link. Then - Use the 'Login' tab at the left side of the screen to login using your ID and password. Check with your system administrator to see if you have an existing login or use the "Register" button at the left to create a login. You will need to login in order to gain access to many areas of the ITRC. Remember to save the User ID assigned to you, and your password. 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. 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 HP-UX 11.XX systems. For information on the HP-UX Security Patch Check tool, see: http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/ displayProductInfo.pl?productNumber3DB6834AA" The security patch matrix is also available via anonymous ftp: ftp.itrc.hp.com:~ftp/export/patches/hp-ux_patch_matrix On the "Support Information Digest Main" page: click on the "HP Security Bulletin Archive". E. 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. Permission is granted for copying and circulating this Advisory to Hewlett-Packard (HP) customers (or the Internet community) for the purpose of alerting them to problems, if and only if, the Advisory is not edited or changed in any way, is attributed to HP, and provided such reproduction and/or distribution is performed for non-commercial purposes. Any other use of this information is prohibited. HP is not liable for any misuse of this information by any third party. ______________________________________________________________________ -----End of Document ID: HPSBMP0107-012--------------------------------------