-----BEGIN PGP SIGNED MESSAGE----- Internet Security Systems Security Advisory August 27, 2001 Remote Buffer Overflow Vulnerability in HP-UX Line Printer Daemon Synopsis: Internet Security Systems (ISS) X-Force has discovered a buffer overflow in the HP-UX line printer daemon (rlpdaemon). The rpldaemon service contains a buffer overflow that may allow a remote or local attacker to execute arbitrary code with superuser privilege. Affected Versions: HP-UX 10.01 HP-UX 10.10 HP-UX 10.20 HP-UX 11.00 HP-UX 11.11 Description: HP-UX is shipped with a line printer daemon adapted from BSD Unix. Many commercial and open-source operating systems are adapted from BSD Unix. The HP line printer daemon is similar to "in.lpd" in other Unix variants. The Line Printer Daemon is used to allow heterogeneous Unix environments to share printers over a network. A buffer overflow exists in rlpdaemon that may allow remote attackers to send a specially-crafted print request to crash the service, or execute arbitrary code with superuser privilege on the target system. The vulnerability is particularly serious because rlpdaemon is installed and configured by default and is active even if it is not being used. No local account or knowledge of the configuration on the target system is needed to successfully exploit this vulnerability. Recommendations: ISS X-Force recommends that all administrators who have not implemented network printing should immediately disable rlpdaemon, as well as any other unused services. HP has made the following patches available to address the vulnerability described in this advisory: 10.01 PHCO_24697 10.10 PHCO_24698 10.20 PHCO_24699 11.00 PHCO_24700 11.11 PHCO_24701 To access these patches, visit the following address: http://us-support.external.hp.com ISS X-Force will provide detection and assessment support for these vulnerabilities in upcoming X-Press Updates for RealSecure Network Sensor and Internet Scanner. Additional Information: The Common Vulnerabilities and Exposures (CVE) project has assigned the name CAN-2001-0668 to this issue. This is a candidate for inclusion in the CVE list http://cve.mitre.org, which standardizes names for security problems. Credits: This vulnerability was discovered and researched by Chris Spencer of Internet Security Systems. ISS would like to thank HP for their response and handling of this vulnerability. ______ About Internet Security Systems (ISS) Internet Security Systems is a leading global provider of security management solutions for the Internet, protecting digital assets and ensuring safe and uninterrupted e-business. With its industry-leading intrusion detection and vulnerability assessment, remote managed security services, and strategic consulting and education offerings, ISS is a trusted security provider to more than 8,000 customers worldwide including 21 of the 25 largest U.S. commercial banks and the top 10 U.S. telecommunications companies. Founded in 1994, ISS is headquartered in Atlanta, GA, with additional offices throughout North America and international operations in Asia, Australia, Europe, Latin America and the Middle East. For more information, visit the Internet Security Systems web site at www.iss.net or call 888-901-7477. Copyright (c) 2001 Internet Security Systems, Inc. Permission is hereby granted for the redistribution of this Alert electronically. It is not to be edited in any way without express consent of the X-Force. If you wish to reprint the whole or any part of this Alert in any other medium excluding electronic medium, please e-mail xforceat_private for permission. Disclaimer The information within this paper may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties with regard to this information. In no event shall the author be liable for any damages whatsoever arising out of or in connection with the use or spread of this information. Any use of this information is at the user's own risk. X-Force PGP Key available at: http://xforce.iss.net/sensitive.php as well as on MIT's PGP key server and PGP.com's key server. Please send suggestions, updates, and comments to: X-Force xforceat_private of Internet Security Systems, Inc. -----BEGIN PGP SIGNATURE----- Version: 2.6.3a Charset: noconv iQCVAwUBO4pzxDRfJiV99eG9AQF00gP9FQl99nMc61CTBZBsOXWREg9k8sTs5DAg aeHb+WC4fqLT46bblsYOQcgTfhQqYNF8VshhTDMMNYd68oVg9G8IjjK5aE1LJfhF Gy3faY88NUVOxTsvh5jKmxV5xwUAn8f4waI6jBidqEVSR56OpjqO6FJaJ+dU2FN0 2WAswUHRp4Q= =vFhW -----END PGP SIGNATURE-----
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