From agent99@boytoy.csd.sgi.com Thu Aug 6 17:19:12 1998 From: SGI Security Coordinator To: agent99@sgi.com Date: Thu, 6 Aug 1998 15:16:27 -0700 (PDT) Subject: IRIX IP Spoofing/TCP Sequence Attack Update -----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ Silicon Graphics Inc. Security Advisory Title: IRIX IP Spoofing/TCP Sequence Attack Update Title: CERT CA-96:21 supersedes CERT CA-95:01 Title: SGI Advisory 19961202-01-PX Number: 19950123-02-I Date: August 6, 1998 ______________________________________________________________________________ Silicon Graphics provides this information freely to the SGI user community for its consideration, interpretation, implementation and use. Silicon Graphics recommends that this information be acted upon as soon as possible. Silicon Graphics 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 Silicon Graphics 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. ______________________________________________________________________________ - ------------------------ - ---- Issue Specifics --- - ------------------------ Due to the recent confusion generated by the Internet Security Systems' (ISS) System Security Scanner (S3) Tool v1.5 on IRIX, an update to this advisory has been generated. When CERT CA-95.01 (IP Spoofing Attacks and Hijacked Terminal Connections) was released, SGI released an acknowledgment advisory 19950123-01-A during the investigation. Later, CERT CA-96.21 (TCP SYN Flooding and IP Spoofing Attacks) was released which superseded the IP spoofing portion of CA-95.01. At that time, SGI responded with 19961202-01-PX security advisory which referenced patches for TCP SYN, "Ping of Death" and TCP Sequence/IP Spoof Attack. Unfortunately, when the ISS S3 Tool is scanning IRIX for the TCP Sequence/IP Spoof Attack vulnerability, it incorrectly references SGI Advisory 19950123-01-A. The correct SGI Advisory for TCP Sequence/IP Spoof Attack is 19961202-01-PX. Silicon Graphics Inc. 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 ISS System Security Scanner (S3) v1.5 for IRIX can be installed from the optional WebFORCE Feb. 1998 CD or can be purchased from ISS at: http://www.iss.net/ IRIX 5.3 and IRIX 6.2 are vulnerable to TCP Sequence/IP Spoof Attacks. A local account is not need in order to exploit these vulnerabilities. These vulnerabilities have been publically discussed in Usenet newsgroups and mailing lists. - ----------------- - ---- Solution --- - ----------------- Please see SGI Advisory 19961202-01-PX for patch information: ftp://sgigate.sgi.com/security/19961202-01-PX OS Version Vulnerable? Patch # Other Actions ---------- ----------- --------- ------------- IRIX 3.x yes not avail Note 1 IRIX 4.x yes not avail Note 1 IRIX 5.0.x yes not avail Note 1 IRIX 5.1.x yes not avail Note 1 IRIX 5.2 yes not avail Note 1 IRIX 5.3 yes 1529 IRIX 6.0.x yes not avail Note 1 IRIX 6.1 yes not avail Note 1 IRIX 6.2 yes 1418 IRIX 6.3 no IRIX 6.4 no IRIX 6.5 no NOTES 1) Upgrade to currently supported IRIX operating system. - ------------------------- - ---- Acknowledgments --- - ------------------------- Silicon Graphics wishes to thank the CERT Coordination Center for their assistance in this matter. - ------------------------------------------------------------ - ---- Silicon Graphics Inc. Security Information/Contacts --- - ------------------------------------------------------------ If there are questions about this document, email can be sent to cse-security-alert@sgi.com. ------oOo------ Silicon Graphics 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 information and patches is sgigate.sgi.com (204.94.209.1). Security information and patches are located under the directories ~ftp/security and ~ftp/patches, respectively. The Silicon Graphics Security Headquarters Web page is accessible at the URL http://www.sgi.com/Support/security/security.html. 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------ Silicon Graphics 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------ Silicon Graphics provides a comprehensive customer World Wide Web site. This site is located at http://www.sgi.com/Support/security/security.html. ------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, Silicon Graphics is appropriately credited and the document retains and includes its valid PGP signature. -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBNcolVLQ4cFApAP75AQEVnwP+PT3TWVYsPiiouz7fhyJp6q+krSE4nXvv qdXDX05flM1jX9oBtGBulE+eB8yLswQmRS/fpGlBeTZ7lGYj9R1MKchLmpo8IciN Byiba/osRemVmkznPgRXhgVkTd7B8eKdqmU0T0B2wu0kHBmwF+MT/Wz8MJfSro18 NcvnO4gF92U= =eTcK -----END PGP SIGNATURE-----