From ciac@rumpole.llnl.gov Fri Dec 24 01:52:56 1999 From: CIAC Mail User Resent-From: mea culpa To: ciac-bulletin@rumpole.llnl.gov Resent-To: jericho@attrition.org Date: Tue, 21 Dec 1999 15:10:26 -0800 (PST) Subject: CIAC Bulletin K-011: Buffer Overflow Vulnerabilities in SSH Daemon and RSAREF2 [ For Public Release ] -----BEGIN PGP SIGNED MESSAGE----- __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Buffer Overflow Vulnerabilities in SSH Daemon and RSAREF2 December 21, 1999 17:00 GMT Number K-011 ______________________________________________________________________________ PROBLEM: A buffer overflow vulnerabilities has been identified in SSH Daemon and RSAREF2 Library. PLATFORM: Systems running some versions of sshd that are vulnerable are: F-Secure SSH versions prior 1.3.7 FreeBSD 3.3R Configuration of NetBSD SSH1 thru SSH1.2.27 RSAREF v2.0 DAMAGE: A buffer overflow may be exploited to gain root access. SOLUTION: Apply the available patches. ______________________________________________________________________________ VULNERABILITY The risk is HIGH. Buffer overflow attacks are common and easy ASSESSMENT: to execute. ______________________________________________________________________________ http://www.ciac.org/ciac/bulletins/k-011.shtml ______________________________________________________________________________ CIAC wishes to acknowledge the contributions of CERT 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. 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. 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LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) K-001: Four Vulnerabilities in the Common Desktop Environment 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 -----BEGIN PGP SIGNATURE----- Version: 4.0 Business Edition iQCVAwUBOF/WxbnzJzdsy3QZAQGPRgQAiIcFzSEbj+GPq4TegNrvf65vhlxkUBiD erzf5X284AC2wn4GovEx3EB5i0bJu1rFPm1DyJx8rYjb8/u9LtESZlKhJlQqoHcD gz9gNeTGDzx7791zsSoRGnHCf5LzX/fdXli4bxwJK7e2njeYjTFlYlnLLW+OtFTh C9EYa3F6nPs= =Z55Z -----END PGP SIGNATURE-----