__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN McAfee Scan Engine LHA File Flaws [US-CERT Vulnerability Note #361180] March 22, 2005 23:00 GMT Number P-158 ______________________________________________________________________________ PROBLEM: A vulnerability was discovered in McAfee AntiVirus Library, a widely used antivirus solution. PLATFORM: McAfee InternetSecurity Suite VirusScan (all versions) VirusScan Professional Active Mail Protection Active Threat Protection Active Virus Defense SMB Edition Active VirusScan SMB Edition GroupShield for Exchange GroupShield for Exchange 5.5 GroupShield for Lotus Domino GroupShield for Mail Servers with ePO LinuxShield Managed VirusScan NetShield for Netware PortalShield for Microsoft SharePoint SecurityShield for Microsoft ISA Server Virex VirusScan ASaP VirusScan Command Line VirusScan Enterprise 8.0i VirusScan for NetApp WebShield Appliances WebShield SMTP DAMAGE: A buffer overflow vulnerability allow an attacker access to networks and machines without authentication. SOLUTION: Apply the security upgrade. ______________________________________________________________________________ VULNERABILITY The risk is HIGH. A remote attacker may execute arbitrary code. ASSESSMENT: This product is widely used. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/p-158.shtml ORIGINAL BULLETIN: US-CERT Vulnerability Note #361180 http://www.kb.cert.org/vuls/id/361180 ADDITIONAL LINKS: McAfee Security Bulletin of March 17, 2005 http://images.mcafee.com/misc/McAfee_Security_Bulletin_ 05-march-17.pdf ISS Protection Brief http://xforce.iss.net/xforce/alerts/id/190 CVE/CAN: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CAN-2005-0643, CAN-2005-0644 ______________________________________________________________________________ [***** Start US-CERT Vulnerability Note #361180 *****] Vulnerability Note VU#361180 McAfee Scan Engine vulnerable to buffer overflow in LHA decoder Overview A buffer overflow vulnerability in the McAfee Virus Scan Engine may allow a remote attacker to execute arbitrary code on an affected system. Because the vulnerability exists in a core component, a number of different McAfee products are affected. I. Description The McAfee Antivirus products feature the ability to detect malicious code in a number of compressed files, including those in the LHA format. A buffer overflow error has been discovered in the way that the McAfee Scan Engine handles the "type 2" headers in an LHA file. A remote attacker with the ability to craft a specifically malfomed LHA file may be able to exploit this vulnerability by introducing the malformed LHA file to an affected system via a web or FTP server, email message, or file server. McAfee lists the following products as being potentially vulnerable to this issue, depending on the version of the scan engine they use: * McAfee InternetSecurity Suite * VirusScan (all versions) * VirusScan Professional * Active Mail Protection * Active Threat Protection * Active Virus Defense SMB Edition * Active VirusScan SMB Edition * GroupShield for Exchange * GroupShield for Exchange 5.5 * GroupShield for Lotus Domino * GroupShield for Mail Servers with ePO * LinuxShield * Managed VirusScan * NetShield for Netware * PortalShield for Microsoft SharePoint * SecurityShield for Microsoft ISA Server * Virex * VirusScan ASaP * VirusScan Command Line * VirusScan Enterprise 8.0i * VirusScan for NetApp * WebShield Appliances * WebShield SMTP II. Impact An unauthenticated remote attacker may be able to execute code of their choosing on a vulnerable system. The attacker-supplied code would be run with Local System privileges, resulting in a complete system compromise. III. Solution Apply an update from the vendor McAfee has published updated versions of the Scan Engine (version 4400 - released November 2004) and DAT file (version 4436 - released March 1, 2005) to address this vulnerability. Users are encouraged to review the McAfee FAQ and McAfee advisory on this issue and update their products accordingly. Systems Affected Vendor Status Date Updated McAfee Vulnerable 21-Mar-2005 References http://xforce.iss.net/xforce/alerts/id/190 http://secunia.com/advisories/14628/ http://www.securityfocus.com/bid/12832 http://www.securitytracker.com/alerts/2005/Mar/1013463.html Credit The CERT/CC credits Alex Wheeler of the ISS X-Force with the discovery of this vulnerability. This document was written by Chad R Dougherty based upon information provided by McAfee and ISS. Other Information Date Public 03/18/2005 Date First Published 03/18/2005 03:25:32 PM Date Last Updated 03/21/2005 CERT Advisory CVE Name CAN-2005-0644 Metric 22.32 Document Revision 6 If you have feedback, comments, or additional information about this vulnerability, please send us email. [***** End US-CERT Vulnerability Note #361180 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of US-CERT 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. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) P-148: Symantec SMTP Binding Configuration Vulnerability P-149: Firefox Security Update P-150: Computer Associates License Manager Remote Vulnerabilities P-151: kdenetwork Package Vulnerability P-152: RealNetworks Security Vulnerabilities P-153: Security Vulnerabilities in Solaris AnswerBook2 Documentation P-154: Ethereal versions 0.9.1 to 0.10.9 Vulnerabilities P-155: Sylpheed Security Update P-156: Apple Security Update 2005-003 P-157: Perl