From ciac@rumpole.llnl.gov Fri Dec 24 01:53:03 1999 From: CIAC Mail User Resent-From: mea culpa To: ciac-bulletin@rumpole.llnl.gov Resent-To: jericho@attrition.org Date: Wed, 22 Dec 1999 05:16:34 -0800 (PST) Subject: CIAC Bulletin K-012: Cisco Cache Engine Authentication Vulnerabilities [ For Public Release ] -----BEGIN PGP SIGNED MESSAGE----- __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Cisco Cache Engine Authentication Vulnerabilities December 21, 1999 17:00 GMT Number K-012 ______________________________________________________________________________ PROBLEM: Cisco has identified three Cache Engine vulnerabilities: 1) Allows unauthorized persons to substitute arbitrary material in place of legitimate content for a website. 2) View performance information via web interface. 3) Allow a null username and password pair to be accepted as valid authentication credentials. PLATFORM: Cisco Cache Engine 2050, Release 1.0 through 1.7.6, Cisco Cache Engine 500, Release 2.0.1 through 2.0.2. DAMAGE: 1) Allow an opportunistic content provider to populate a Cisco Cache Engine with content of their choosing, yet make it appear as any other host name was serving this content. 2) A script can be written to bypass an authentication request and gain access to the performance statistics without authentication. 3) Permit unauthorized persons to alter files on the Cache Engine. SOLUTION: Upgrade software to Cisco Cache Engine 500, Version 2.0.3. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. Cisco knows of no public announcements of ASSESSMENT: these vulnerabilities, nor have any malicious uses been reported to Cisco. ______________________________________________________________________________ http://www.ciac.org/ciac/bulletins/k-012.shtml ______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Cisco for the information contained in this bulletin. ______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, 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. 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LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) K-002: Microsoft IE 5 Vulnerability - "download behavior" K-003: Windows NT 4.0 does not delete Unattended Installation File K-004: Microsoft "Excel SYLK" Vulnerability K-005: Microsoft "Virtual Machine Verifier" Vulnerability K-006: Microsoft - Improve TCP Initial Sequence Number Randomness K-007: Multiple Vulnerabilities in BIND K-008: ExploreZip (packed) Worm K-009: Qpopper Buffer Overflow Vulnerability K-010: Solaris Snoop Buffer Overflow Vulnerability K-011: Buffer Overflow Vulnerabilities in SSH Daemon and RSAREF2 -----BEGIN PGP SIGNATURE----- Version: 4.0 Business Edition iQCVAwUBOGAEy7nzJzdsy3QZAQEaMAQAr3JtecbClEBq9DV08GaaH4CoJTKGbDvJ p/NRNJs9iMBP5j2d1R3pQ27UwscRYiBz3eujgyVqDkZAi4epTKgYZBPCw/nWXcbb TdZRTFJctIfBhBiy2lnr5GBPJuGWW/lGETmtJ4S4v/g5VupVygo9yKiXHqULOv7D Tq09i1cUAMk= =l7S3 -----END PGP SIGNATURE-----