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COMMAND NetVisualyzer nveventd arbitrary file writing SYSTEMS AFFECTED Up to 6.5.16 (included) PROBLEM In SGI Security Advisory 20020607-02-I (a lot of garbage, but as specified in the copyright notice we can not reproduce only interesting parts...): -----BEGIN PGP SIGNED MESSAGE----- _____________________________________________________________________________ SGI Security Advisory Title: nveventd vulnerability Number: 20020607-02-I Date: June 24, 2002 Reference: CAN-2002-0631 _____________________________________________________________________________ - -------------- - --- Update --- - -------------- Fixed formatting issue which caused PGP signature failure on some mailers. - ----------------------- - --- Issue Specifics --- - ----------------------- It\'s been reported that the /usr/NetVis/etc/nveventd component of NetVisualyzer can be configured to allow an unprivileged user to write to any file on the system. This could potentially lead to a root exploit. 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. Since the NetVisualyzer product is being moved to Legacy support mode, SGI has no plans to fix this problem and advises following the workaround outlined in this bulletin. - -------------- - --- Impact --- - -------------- The /usr/NetVis/etc/nveventd daemon is part of the optional NetVisualyzer (specifically, \"netman_display.sw.links\") package, and is not installed by default on IRIX 6.5 systems. To determine the version of IRIX you are running, execute the following command: # uname -R That will return a result similar to the following: # 6.5 6.5.15f The first number (\"6.5\") is the release name, the second (\"6.5.15f\" in this case) is the extended release name. The extended release name is the \"version\" we refer to throughout this document. To see if nveventd is installed, execute the following command: # versions netman_display.sw.links I = Installed, R = Removed Name Date Description I netman_display 05/22/101 NetVisualyzer Display Station Version, 2.2.1 I netman_display.sw 05/22/101 NetVisualyzer Display Station Software I netman_display.sw.links 05/22/101 NetVisualyzer Display Station Software Links If the output resembles the above, then the package is installed and the system is vulnerable. This vulnerability was assigned the following CVE: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0631 SOLUTION - ---------------------------- - --- Temporary Workaround --- - ---------------------------- SGI will not be releasing patches for this problem, as the product is being moved into Legacy support mode. Instead, we recommend removing the suid bit from the nveventd binary by performing the following command: # chmod u-s /usr/NetVis/etc/nveventd After running that command, the permissions and ownership should look like this: # ls -l /usr/NetVis/etc/nveventd -r-xr-xr-x 1 root sys 70468 May 22 2001 /usr/NetVis/etc/nveventd This will fix the problem, and no further action is required. Note that after doing this, only privileged users (typically root) will be able to run nveventd. - ---------------- - --- Solution --- - ---------------- SGI will not be providing a fix or patches for this issue, as the product is being moved into Legacy support mode. Our recommendation is to follow the instructions in the Temporary Workaround section above. 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 unknown Note 1 IRIX 6.1 unknown Note 1 IRIX 6.2 unknown Note 1 IRIX 6.3 unknown Note 1 IRIX 6.4 unknown Note 1 IRIX 6.5 yes Notes 2 & 3 IRIX 6.5.1 yes Notes 2 & 3 IRIX 6.5.2 yes Notes 2 & 3 IRIX 6.5.3 yes Notes 2 & 3 IRIX 6.5.4 yes Notes 2 & 3 IRIX 6.5.5 yes Notes 2 & 3 IRIX 6.5.6 yes Notes 2 & 3 IRIX 6.5.7 yes Notes 2 & 3 IRIX 6.5.8 yes Notes 2 & 3 IRIX 6.5.9 yes Notes 2 & 3 IRIX 6.5.10 yes Notes 2 & 3 IRIX 6.5.11 yes Notes 2 & 3 IRIX 6.5.12 yes Notes 2 & 3 IRIX 6.5.13 yes Notes 2 & 3 IRIX 6.5.14 yes Notes 2 & 3 IRIX 6.5.15 yes Notes 2 & 3 IRIX 6.5.16 yes Notes 2 & 3 NOTES 1) This version of the IRIX operating has been retired. Upgrade to an actively supported IRIX operating system. See http://support.sgi.com/irix/news/index.html#policy for more information. 2) If you have not received an IRIX 6.5.X CD for IRIX 6.5, contact your SGI Support Provider or URL: http://support.sgi.com/irix/swupdates/ 3) Follow the workaround instructions above. - ------------------------ - --- Acknowledgments ---- - ------------------------ SGI wishes to thank Walter Roberson for his assistance in this matter. SGI also wishes to thank Dave Ahmad for catching the bad PGP signature. - ------------- - --- Links --- - ------------- 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. - ----------------------------------------- - --- 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 security-info@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 <YourEmailAddress> end ^d In the example above, <YourEmailAddress> 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------ If there are general security questions on SGI systems, email can be sent to security-info@sgi.com. 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. -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBPRd/dbQ4cFApAP75AQEUGwP/QKH+Q6cm/x4zzOtIp4u4LyvveKAPp3dl /ZJTCadxn3lgRhhCk6iulpqowCSwCV2OgecVFoD80v34HDWvWRKcmXQfr01rG75f 4bQrMBtGx9fdPoT176jQyT/tWqyyJmG9BXNKsymuRsQfqQpBqEuGH5qa6zeD1vKx JrENEX+GkQQ= =9JKx -----END PGP SIGNATURE-----