__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Center ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN SGI netprint Dynamic Shared Objects (DSO) Exploit [SGI Security Advisory 20010701-01-P] July 27, 2001 19:00 GMT Number L-125 ______________________________________________________________________________ PROBLEM: The netprint program is installed on all SGI IRIX systems by default. A potential security vulnerability has been found that can result in root privileges being obtained for systems with open lp accounts. PLATFORM: SGI IRIX 6.5 systems. DAMAGE: An unauthorized local user can use root privileges to run arbitrary code. SOLUTION: Apply the patches or workarounds as prescribed by the SGI Security Advisory. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. A local user account is required in order ASSESSMENT: to exploit this vulnerability. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/l-125.shtml ______________________________________________________________________________ [***** Start SGI Security Advisory 20010701-01-P *****] ______________________________________________________________________________ SGI Security Advisory Title: netprint DSO exploit Reference: CVE CAN-2001-0485 Number: 20010701-01-P Date: July 25, 2001 ______________________________________________________________________________ SGI provides this information freely to the SGI user community for its consideration, interpretation, implementation and use. SGI recommends that this information be acted upon as soon as possible. SGI provides the information in this Security Advisory on an "AS-IS" basis only, and disclaims all warranties with respect thereto, express, implied or otherwise, including, without limitation, any warranty of merchantability or fitness for a particular purpose. In no event shall SGI be liable for any loss of profits, loss of business, loss of data or for any indirect, special, exemplary, incidental or consequential damages of any kind arising from your use of, failure to use or improper use of any of the instructions or information in this Security Advisory. ______________________________________________________________________________ - ------------------- - --- Update Info --- - ------------------- A modification to netprint exploit reported on SGI Security Advisories 19961203-01-PX and 19961203-02-PX allows root access on IRIX 6.5 systems that have open lp accounts. - ----------------------- - --- Issue Specifics --- - ----------------------- v9@realhalo.org has reported to BUGTRAQ a vulnerability in netprint which can lead to a root compromise on IRIX 6.5 systems that have open lp accounts. SGI has investigated the issue and recommends the following steps for neutralizing the exposure. It is HIGHLY RECOMMENDED that these measures be implemented on ALL vulnerable SGI systems. This issue will be corrected in future releases of IRIX. - -------------- - --- Impact --- - -------------- The /usr/lib/print/netprint program is installed on all SGI IRIX systems by default. A potential security vulnerability has been found that can result in root privileges being obtained for systems with open lp accounts. A local user account is required in order to exploit this vulnerability. This netprint vulnerability has been publicly discussed in Usenet newsgroups and mailing lists. This netprint DSO vulnerability was reported by v9@realhalo.org : http://www.securityfocus.com/bid/395 http://www.securityfocus.com/archive/1/179791 This vulnerability has been assigned the following CVE: CAN-2001-0485 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-0485 - -------------------------- - --- Temporary Solution --- - -------------------------- Although patches are available for this issue, it is realized that there may be situations where installing the patches immediately may not be possible. The steps below can be used to disable the netprint program to prevent exploitation of this vulnerability until patches can be installed. ================= **** WARNING **** ================= Removing the setuid root permissions from the netprint program will prevent non-root users from using netprint. 1) Become the root user on the system. % /bin/su - Password: # 2) Change the permissions on the netprint program. # /bin/chmod 500 /usr/lib/print/netprint 3) Return to previous level. # exit % - ---------------- - --- Solution --- - ---------------- OS Version Vulnerable? Patch # Other Actions ---------- ----------- ------- ------------- IRIX 3.x unknown Note 1 IRIX 4.x unknown Note 1 IRIX 5.x unknown Note 1 IRIX 6.0.x-6.4 unknown Note 1 IRIX 6.5-6.5.11 yes Note 2 & 3 IRIX 6.5.12m yes 4310 Note 3 & 4 IRIX 6.5.12f yes 4311 Note 3 & 4 IRIX 6.5.13 no Note 4 NOTES 1) This version of the IRIX operating has been retired. Upgrade to an actively supported IRIX operating system. See http://support.sgi.com/news/support/index.html#customer_letters for more information. 2) This version of the IRIX operating system is in maintenance mode. Upgrade to an actively supported IRIX operating system. See http://support.sgi.com/news/support/index.html#customer_letters for more information. 3) See "Temporary Solution" section. 4) Download the latest IRIX 6.5 Maintenance Release from the URL: http://support.sgi.com/colls/patches/tools/relstream/index.html or contact your local SGI support provider to obtain the latest IRIX 6.5 Maintenance Release CD set. Patches are available via the web, anonymous FTP and from your SGI service/support provider. SGI Security Advisories can be found at: http://www.sgi.com/support/security/ and ftp://patches.sgi.com/support/free/security/advisories/ SGI Security Patches can be found at: http://www.sgi.com/support/security/ and ftp://patches.sgi.com/support/free/security/patches/ SGI patches for IRIX can be found at the following patch servers: http://support.sgi.com/irix/ and ftp://patches.sgi.com/ SGI freeware updates for IRIX can be found at: http://freeware.sgi.com/ SGI fixes for SGI open sourced code can be found on: http://oss.sgi.com/projects/ SGI patches and RPMs for Linux can be found at: http://support.sgi.com/linux/ or http://oss.sgi.com/projects/sgilinux-combined/download/security-fixes/ SGI patches for Windows NT or 2000 can be found at: http://support.sgi.com/nt/ IRIX 5.2-6.4 Recommended/Required Patch Sets can be found at: http://support.sgi.com/irix/ and ftp://patches.sgi.com/support/patchset/ IRIX 6.5 Maintenance Release Streams can be found at: http://support.sgi.com/colls/patches/tools/relstream/index.html IRIX 6.5 Software Update CDs can be obtained from: http://support.sgi.com/irix/swupdates/ The primary SGI anonymous FTP site for security advisories and patches is patches.sgi.com (216.32.174.211). Security advisories and patches are located under the URL ftp://patches.sgi.com/support/free/security/ For security and patch management reasons, ftp.sgi.com (mirrors patches.sgi.com security FTP repository) lags behind and does not do a real-time update. ##### Patch File Checksums #### The actual patch will be a tar file containing the following files: Filename: README.patch.4310 Algorithm #1 (sum -r): 15520 8 README.patch.4310 Algorithm #2 (sum): 29352 8 README.patch.4310 MD5 checksum: CA53410D76FD4BE978A04DF4C1FC9DCA Filename: patchSG0004310 Algorithm #1 (sum -r): 42076 2 patchSG0004310 Algorithm #2 (sum): 36286 2 patchSG0004310 MD5 checksum: ED4F415E8D3341560680E3B5BAC5AEEF Filename: patchSG0004310.idb Algorithm #1 (sum -r): 50455 1 patchSG0004310.idb Algorithm #2 (sum): 37083 1 patchSG0004310.idb MD5 checksum: B41D14724D6E125C4D2963C3AB06D758 Filename: patchSG0004310.print_sw Algorithm #1 (sum -r): 29531 24 patchSG0004310.print_sw Algorithm #2 (sum): 9251 24 patchSG0004310.print_sw MD5 checksum: 47BDF1195787C13C11654D30708BB2A0 Filename: README.patch.4311 Algorithm #1 (sum -r): 65116 8 README.patch.4311 Algorithm #2 (sum): 29192 8 README.patch.4311 MD5 checksum: 8E4D6CD82A996CC94E24F3ED458EA6FD Filename: patchSG0004311 Algorithm #1 (sum -r): 29883 2 patchSG0004311 Algorithm #2 (sum): 37557 2 patchSG0004311 MD5 checksum: A0FB9860D3C41ADB1D3979A64E358DFB Filename: patchSG0004311.idb Algorithm #1 (sum -r): 62316 1 patchSG0004311.idb Algorithm #2 (sum): 37115 1 patchSG0004311.idb MD5 checksum: DC6FDD6DD7B5A0F0404AC8CB5EB91783 Filename: patchSG0004311.print_sw Algorithm #1 (sum -r): 41881 24 patchSG0004311.print_sw Algorithm #2 (sum): 7152 24 patchSG0004311.print_sw MD5 checksum: BC2A92B11A049ADC04984E6967973A9A - ------------------------ - --- Acknowledgments ---- - ------------------------ SGI wishes to thank the users of the Internet Community at large for their assistance in this matter. - ----------------------------------------- - --- SGI Security Information/Contacts --- - ----------------------------------------- If there are questions about this document, email can be sent to security-info@sgi.com. ------oOo------ SGI provides security information and patches for use by the entire SGI community. This information is freely available to any person needing the information and is available via anonymous FTP and the Web. The primary SGI anonymous FTP site for security advisories and patches is patches.sgi.com (216.32.174.211). Security advisories and patches are located under the URL ftp://patches.sgi.com/support/free/security/ The SGI Security Headquarters Web page is accessible at the URL: http://www.sgi.com/support/security/ For issues with the patches on the FTP sites, email can be sent to cse-security-alert@sgi.com. For assistance obtaining or working with security patches, please contact your SGI support provider. ------oOo------ SGI provides a free security mailing list service called wiretap and encourages interested parties to self-subscribe to receive (via email) all SGI Security Advisories when they are released. Subscribing to the mailing list can be done via the Web (http://www.sgi.com/support/security/wiretap.html) or by sending email to SGI as outlined below. % mail wiretap-request@sgi.com subscribe wiretap end ^d In the example above, is the email address that you wish the mailing list information sent to. The word end must be on a separate line to indicate the end of the body of the message. The control-d (^d) is used to indicate to the mail program that you are finished composing the mail message. ------oOo------ SGI provides a comprehensive customer World Wide Web site. This site is located at http://www.sgi.com/support/security/ . ------oOo------ For reporting *NEW* SGI security issues, email can be sent to security-alert@sgi.com or contact your SGI support provider. A support contract is not required for submitting a security report. ______________________________________________________________________________ This information is provided freely to all interested parties and may be redistributed provided that it is not altered in any way, SGI is appropriately credited and the document retains and includes its valid PGP signature. [***** End SGI Security Advisory 20010701-01-P *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of SGI for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Center, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) L-115: Hewlett-Packard dlkm Vulnerability L-116: Lightweight Directory Access Protocol (LDAP) Vulnerabilities L-117: The Code Red Worm L-118: Hewlett-Packard ftpd and ftp Vulnerability L-119: Hewlett-Packard mkacct Program Vulnerability L-120: Cisco "Code Red" Worm Impact L-121: SSH Secure Shell Remote Root Exploit Vulnerability L-122: FreeBSD tcpdump Remote Buffer OVerflow Vulnerability L-123: AIX libi18n Library Vulnerability L-124: Remote Buffer Overflow in telnetd