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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2001.243 -- ISS Security Advisory Remote Buffer Overflow Vulnerability in Solaris Print Protocol Daemon 20 June 2001 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: in.lpd Vendor: Sun Microsystems Operating System: Solaris 2.6 Solaris 2.6 x86 Solaris 7 Solaris 7 x86 Solaris 8 Solaris 8 x86 Impact: Root Compromise Denial of Service Access Required: Remote - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Internet Security Systems Security Advisory June 19, 2001 Remote Buffer Overflow Vulnerability in Solaris Print Protocol Daemon Synopsis: ISS X-Force has discovered a buffer overflow in the Solaris line printer daemon (in.lpd) that may allow a remote or local attacker to crash the daemon or execute arbitrary code with super user privilege. This daemon runs with root privileges by default on all current Solaris versions. Impact: Solaris installs the in.lpd line printer software by default. This vulnerability may allow a remote attacker to execute arbitrary commands without restriction. No local access to the target system is required to exploit this vulnerability. Affected Versions: Solaris 2.6 Solaris 2.6 x86 Solaris 7 Solaris 7 x86 Solaris 8 Solaris 8 x86 Description: The Solaris BSD print protocol daemon provides an interface for remote users to interact with a local printer. The in.lpd daemon listens on the network for remote requests on port 515. By listening for remote requests, there is an opportunity for a malicious user to exploit this vulnerability remotely. The in.lpd daemon provides extensive functionality to network users who intend to print documents over a network. There is a flaw in the “transfer job” routine, which may allow attackers to overflow an unchecked buffer. Attackers may exploit this vulnerability to crash the printer daemon, or execute arbitrary code as super user on a target system. All current versions of Solaris install and enable the in.lpd daemon by default. Recommendations: Sun Microsystems has informed ISS X-Force that patches are in development and will be made available in July. Sun Microsystems has provided ISS X-Force with following patch information. ISS X-Force recommends installing a patch for this vulnerability when they are made available. 106235-09 SunOS 5.6: lp patch 106236-09 SunOS 5.6_x86: lp patch 107115-08 SunOS 5.7: LP patch 107116-08 SunOS 5.7_x86: LP patch 109320-04 SunOS 5.8: LP patch 109321-04 SunOS 5.8_x86: LP patch Until these patches are released, ISS X-Force recommends that the in.lpd daemon be disabled on all vulnerable systems. To disable the in.lpd daemon: 1. Change user to root. 2. Open /etc/inetd.conf in any text editor. 3. Search for the line beginning with “printer”. 4. Insert a coment, or “#” character at the beginning of this line. 5. Restart inetd. ISS X-Force recommends that all unused daemons or services be disabled to prevent exposure to both known and unknown vulnerabilities. ISS X-Force will provide detection and assessment support for this vulnerability in future X-Press Updates for ISS RealSecure and ISS Internet Scanner. Additional Information: The Common Vulnerabilities and Exposures (CVE) project has assigned the name CAN-2001-0353 to this issue. This is a candidate for inclusion in the CVE list (<http://cve.mitre.org>), which standardizes names for security problems. ______ About Internet Security Systems (ISS) Internet Security Systems is the 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 xforce@iss.net for permission. 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Please send suggestions, updates, and comments to: X-Force xforce@iss.net of Internet Security Systems, Inc. - -----BEGIN PGP SIGNATURE----- Version: 2.6.3a Charset: noconv iQCVAwUBOy/AazRfJiV99eG9AQGj6gP9HJegvRM72MLN8vRjNDQpqNxJ7nctC1nl O5iIlYtGnu2wBb69IByu6/7L9Q6gOoI3lrxNAsXtyOariaWzlagVyyiq3jaK5eGT NYvHIZfmJ1V7AIAtlsKglQ5gRSmNiYSIVjP9E+zXCMm/YKZt9LYE+LWPUxAQ2KZx UZXuld28t2M= =P4ho - -----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 iQCVAwUBOzC3oih9+71yA2DNAQGPfgP+MU7K7fAwRepxc+dPdMvWrcESiJrWYLD4 o/Z20jlSJLzXvg9e2qbwIYYMT9yw/OZQ2De0ajhssjiTXRvZeyn92Dl+MU4BSPZC hZBy+y188YMvHCAc4lJQxIJH8WViyRaTMa7A0o07gag69B4dm4a5ndxJt8E8RvhW G17YVklHBJw= =X3eL -----END PGP SIGNATURE-----