-----BEGIN PGP SIGNED MESSAGE----- __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN HP-UX rpc.pcnfsd Vulnerability February 10, 1999 17:00 GMT Number J-026 ______________________________________________________________________________ PROBLEM: Hewlett-Packard has identified a vulnerability in the rpc.pcnfsd which is used in the spool directory. PLATFORM: HP 9000 series 700/800. DAMAGE: If exploited, remote and local users could gain root access. SOLUTION: Apply patches and reboot. ______________________________________________________________________________ VULNERABILITY Risk is high. If exploited, this defect could allow the main ASSESSMENT: printer spool directory to be made world writeable. Hewlett-Packard recommends that the patches be applied as soon as possible. ______________________________________________________________________________ [ Start Hewlett-Packard Advisory ] Document ID: HPSBUX9902-091 Date Loaded: 19990207 Title: Security Vulnerability with rpc.pcnfsd - ------------------------------------------------------------------------- HEWLETT-PACKARD COMPANY SECURITY BULLETIN: #00091, 08 Febraury 1999 - ------------------------------------------------------------------------- The information in the following Security Bulletin should be acted upon as soon as possible. Hewlett-Packard Company will not be liable for any consequences to any customer resulting from customer's failure to fully implement instructions in this Security Bulletin as soon as possible. - ------------------------------------------------------------------------- PROBLEM: rpc.pcnfsd has an error in its use of the spool directory PLATFORM: HP 9000 series 700/800. DAMAGE: Remote and local users can compromise root access. SOLUTION: Install _all_ applicable patches listed below. Reboot required. AVAILABILITY: All patches are available now. - ------------------------------------------------------------------------- I. A. Background rpc.pcnfsd is a remote procedure call used by NFS clients which is a service providing username and password authentication for system which have NFS client software installed. If exploited, this defect allows the main printer spool directory used by rpc.pcnfsd to be made world writeable. B. Fixing the problem This involves installing a series of patches which require rebooting the system. The main patch requires a libc patch, which in turn requires a kernal patch. For HP-UX 10.01: PHNE_17248 For HP-UX 10.10: PHNE_17248 For HP-UX 10.20: PHNE_17098 For HP-UX 11.00: PHNE_16470 The following sets of patches will need to be installed to resolve all the documented patch dependencies. The dependencies will be satisfied by the patches listed, or any patch that supersedes them: s700 10.01: PHNE_17248, PHKL_7059, PHCO_14253; s800 10.01: PHNE_17248, PHKL_7060, PHCO_14253; s700 10.10: PHNE_17248, PHKL_8292, PHCO_14254; s800 10.10: PHNE_17248, PHKL_8293, PHCO_14254; s700 10.20: PHNE_17098, PHKL_9155, PHKL_16750, PHCO_13777, PHCO_12922, PHCO_17389, PHNE_16237, PHKL_16959, PHKL_17012, PHKL_17253, PHKL_12007; s800 10.20: PHNE_17098, PHKL_9156, PHKL_16751, PHCO_13777, PHCO_12922, PHCO_17389, PHNE_17097, PHKL_16957, PHKL_17013, PHKL_17254, PHKL_12008; s700 11.00: PHNE_16470, PHCO_16629, PHKL_15689, PHCO_14625; s800 11.00: PHNE_16470, PHCO_16629, PHKL_15689, PHCO_14625. NOTE: This problem is fixed fully in HP-UX release 11.01. C. 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The security patch matrix is also available via anonymous ftp: us-ffs.external.hp.com ~ftp/export/patches/hp-ux_patch_matrix D. To report new security vulnerabilities, send email to security-alert@hp.com Please encrypt any exploit information using the security-alert PGP key, available from your local key server, or by sending a message with a -subject- (not body) of 'get key' (no quotes) to security-alert@hp.com. Permission is granted for copying and circulating this Bulletin to Hewlett-Packard (HP) customers (or the Internet community) for the purpose of alerting them to problems, if and only if, the Bulletin is not edited or changed in any way, is attributed to HP, and provided such reproduction and/or distribution is performed for non-commercial purposes. Any other use of this information is prohibited. HP is not liable for any misuse of this information by any third party. ________________________________________________________________________ - -----End of Document ID: HPSBUX9902-091-------------------------------------- [ End Hewlett-Packard Advisory ] ______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Hewlett-Packard 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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