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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2001.498 -- NetBSD Security Advisory 2001-018 Remote Buffer Overflow Vulnerability in LPD 26 November 2001 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: lpd Vendor: NetBSD Operating System: NetBSD-current prior to August 28, 2001 NetBSD-1.5.2 NetBSD-1.5.1 NetBSD-1.5 NetBSD-1.4.* Impact: Root Compromise Access Required: Remote Ref: ESB-2001.467 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- NetBSD Security Advisory 2001-018 ================================= Topic: Remote Buffer Overflow Vulnerability in BSD Line Printer Daemon Version: NetBSD-current: prior to August 28, 2001 NetBSD-1.5.2: affected NetBSD-1.5.1: affected NetBSD-1.5: affected NetBSD-1.4.*: affected Severity: Remote root compromise from any host which can connect to lpd(8) Fixed: NetBSD-current: August 28, 2001 NetBSD-1.5 branch: September 30, 2001 NetBSD-1.4 branch: not yet Abstract ======== There is an remotely exploitable buffer overrun in the printer daemon, /usr/sbin/lpd. Technical Details ================= http://msgs.securepoint.com/cgi-bin/get/bugtraq0108/259.html Solutions and Workarounds ========================= NetBSD 1.3 and later install with lpd disabled by default. A system is vulnerable to this security hole only if it is running /usr/sbin/lpd, and access to lpd is allowed by entries in /etc/hosts.lpd. Updating the binary for safety is recommended. Quick workaround: If you are running /usr/sbin/lpd, and you do not need it, stop it. If you have /etc/hosts.lpd which is open to everyone, you will want to tighten the setup so that no malicious parties can access your remote printer. Solutions: * NetBSD -current, 1.5, 1.5.1, 1.5.2: Systems running NetBSD-current dated from before 2001-08-28 should be upgraded to NetBSD-current dated 2001-08-28 or later. Systems running NetBSD 1.5, 1.5.1 or 1.5.2 dated from before 2001-09-30 should be upgraded to NetBSD-1.5 branch sources dated 2001-09-30 or later. The following directory needs to be updated from the netbsd-current CVS branch (aka HEAD) for NetBSD-current, or netbsd-1-5 CVS branch for NetBSD 1.5, 1.5.1 or 1.5.2: src/usr.sbin/lpr To update from CVS, re-build, and re-install lpd(8): # cd src/usr.sbin/lpr # cvs update -d -P # make cleandir dependall install Alternatively, apply the following patch (with potential offset differences) and rebuild & re-install lpd(8): ftp://ftp.netbsd.org/pub/NetBSD/security/patches/SA2001-018-lpd.patch To patch, re-build and re-install lpd(8): # cd src/usr.sbin/lpr/common_sources # patch < /path/to/SA2001-012-lpd.patch # make cleandir dependall install * NetBSD 1.4, 1.4.x: Systems running NetBSD-1.4.x releases should apply the following patch (with potential offset differences): ftp://ftp.netbsd.org/pub/NetBSD/security/patches/SA2001-018-lpd.patch To patch, re-build and re-install lpd(8): # cd src/usr.sbin/lpr/common_sources # patch < /path/to/SA2001-012-lpd.patch # make cleandir dependall install The anonymous CVS branch netbsd-1-4 should be updated with a fix in the near future. Thanks To ========= Jun-ichiro Hagino for the original patches to -current, from a fix in OpenBSD Revision History ================ 2001-11-22 Initial release More Information ================ An up-to-date PGP signed copy of this release will be maintained at ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2001-018.txt.asc Information about NetBSD and NetBSD security can be found at http://www.NetBSD.ORG/ and http://www.NetBSD.ORG/Security/. Copyright 2001, The NetBSD Foundation, Inc. All Rights Reserved. $NetBSD: NetBSD-SA2001-018.txt,v 1.6 2001/11/22 15:21:45 david Exp $ - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (NetBSD) Comment: For info see http://www.gnupg.org iQCVAwUBO/0YaT5Ru2/4N2IFAQFP2wP/cSSUxRgwi/JOWj7Yx6u35ygYpuZV3oXs utQs/astpcjqVPQGqw0BRAuG5dJCqmLqf0F//cpwmFn/V5f5ByhwJE+x/KrtJ19N S36uB6AAQYQ7Bh9GGVApncKwk2XeA3XcI2PAWX1VkRStzU/k6QYunfqqRdnMr5xr srHaB5bZ9FQ= =Wn9T - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. 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: auscert@auscert.org.au 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 iQCVAwUBPAJNiCh9+71yA2DNAQGZewP+MIK4b/jZmmXseFirDJqrNXQ8lI1zUowN 2GZa8hSWr5mFq8REGiwsGqBorDf63fp8OgwLxwzjUtZIQ/8VDORfl3dZU48owFJt /uTBknN4KtEJoKbJG4jgkfrl/g7eJZ4m2+UzxLHg8BK/IK8NRaH1XK+i/wrqUfYF Ir6cyVXApak= =0ngT -----END PGP SIGNATURE-----