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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2001.014 -- FreeBSD-SA-00:81 ethereal allows remote code execution 10 January 2001 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: ethereal Vendor: FreeBSD Ports Collection Operating System: FreeBSD BSD Impact: Denial of Service Root Compromise Access Required: Remote - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- ============================================================================= FreeBSD-SA-00:81 Security Advisory FreeBSD, Inc. Topic: ethereal allows remote code execution Category: ports Module: ethereal Announced: 2000-12-20 Credits: firstname.lastname@example.org Affects: Ports collection prior to the correction date. Corrected: 2000-11-21 Vendor status: Updated version released FreeBSD only: NO I. Background ethereal is a tool for monitoring network activity. II. Problem Description The ethereal port, versions prior to 0.8.14, contains buffer overflows which allow a remote attacker to crash ethereal or execute arbitrary code on the local system as the user running ethereal, typically the root user. These vulnerabilities are identical to those described in advisory 00:61 relating to tcpdump. The ethereal port is not installed by default, nor is it "part of FreeBSD" as such: it is part of the FreeBSD ports collection, which contains over 4200 third-party applications in a ready-to-install format. The ports collections shipped with FreeBSD 3.5.1 and 4.2 are vulnerable to this problem since it was discovered after the releases. FreeBSD makes no claim about the security of these third-party applications, although an effort is underway to provide a security audit of the most security-critical ports. III. Impact Remote users can cause the local ethereal process to crash, or to execute arbitrary code as the user running ethereal (usually root). IV. Workaround Do not use vulnerable versions of ethereal in network environments which may contain packets from untrusted sources. Deinstall the ethereal port/package, if you have installed it. V. Solution One of the following: 1) Upgrade your entire ports collection and rebuild the ethereal port. 2) Deinstall the old package and install a new package dated after the correction date, obtained from the following directories: ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/net/ethereal-0.8.14.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/net/ethereal-0.8.14.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/net/ethereal-0.8.14.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/net/ethereal-0.8.14.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/net/ethereal-0.8.14.tgz 3) download a new port skeleton for the ethereal port from: http://www.freebsd.org/ports/ and use it to rebuild the port. 4) Use the portcheckout utility to automate option (3) above. The portcheckout port is available in /usr/ports/devel/portcheckout or the package can be obtained from: ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/devel/portcheckout-2.0.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/portcheckout-2.0.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/devel/portcheckout-2.0.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/portcheckout-2.0.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/devel/portcheckout-2.0.tgz - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.4 (FreeBSD) Comment: For info see http://www.gnupg.org iQCVAwUBOkDOpVUuHi5z0oilAQFETAP/dV59JADazj/mrRLSW8a6JQluGrU4ZnYY 60KmcRkiuCte+WehA3ZE0h2WRz+RbWuszeyIZ21j6Kz4a0mbb0WURcHtj5CtlQZj BMgezi15rnSfIzfFX4lEZX6bzR9xaPuJSfrRNaMhWY+ioWLQ+fFL8OcllTfa+LYx HUzOVq9kWQk= =s7BI - -----END PGP SIGNATURE----- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security-notifications" in the body of the message - --------------------------END INCLUDED TEXT-------------------- This security bulletin is provided as a service to AusCERT's members. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/Information/advisories.html If you believe that your system has been compromised, contact AusCERT or your representative in FIRST (Forum of Incident Response and Security Teams). Internet Email: email@example.com Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for emergencies. -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key iQCVAwUBOm/yzih9+71yA2DNAQE5CgP/eH28Nh1Vf3skyGfov54W2/SQ05+tTnhg XGlWkKAl13D/H0yiFp0v8I2jBkbobc2jxAVjy4pbWEVryK5yWKxC0iC+xxM70f92 f6Y++weHYY/aeTFmf4SuDe2o9Jcoea+leosWoE7zCUahzEHMTHQDQpMEiP8Ib/vF uz87pE2qSD4= =qo/u -----END PGP SIGNATURE-----