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eTrust Antivirus Zip Archive Virus Detection Bypass Vulnerability
Secunia Advisory:	SA12877	Advisory Toolbox: Issue ticket Save in to-do list Mark as handled Exploit information Download as PDF Review actions Add comment
Release Date:	2004-10-20
Last Update:	2004-11-16
Popularity:	12,212 views

Critical:	Moderately critical
Impact:	Security Bypass
Where:	From remote
Solution Status:	Vendor Patch

Software:	BrightStor ARCserve Backup 11.x (for Windows) eTrust Antivirus 6.x eTrust Antivirus 7.x eTrust EZ Antivirus 6.x eTrust EZ Armor 2.x eTrust InoculateIT 6.x for Linux eTrust InoculateIT 6.x for Windows eTrust Intrusion Detection 3.x eTrust Secure Content Manager (SCM) ZoneAlarm Antivirus 5.x ZoneAlarm Security Suite 5.x

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CVE reference:	CVE-2004-0933

Description: A vulnerability has been reported in eTrust Antivirus, which can be exploited by malware to bypass certain scanning functionality. The vulnerability is caused due to an error in the decompression engine (Arclib.dll) when parsing .zip archive headers and can be exploited via a specially crafted .zip archive where the uncompressed size of the archived file has been modified within the local and global headers. Successful exploitation causes malware in a specially crafted .zip archive to pass the scanning functionality undetected. NOTE: This is not a critical issue on client systems, as the malware still is detected upon execution by the eTrust Antivirus Real-Time scanner. Solution: Apply fixes. CA InoculateIT 6.0 and eTrust Antivirus r6.0 (all platforms including Notes/Exchange): http://supportconnectw.ca.com/premium/antivirus/downloads/nt/6.0/etavnt_60.asp eTrust Antivirus r7.0 (all platforms including Notes/Exchange): http://supportconnectw.ca.com/premium...rus/downloads/nt/7.0/etavwinnt_70.asp eTrust Antivirus r7.1 (all platforms including Notes/Exchange): http://supportconnectw.ca.com/premium...rus/downloads/nt/7.1/etavwinnt_71.asp eTrust Antivirus for the Gateway r7.0 (all modules and platforms) http://supportconnectw.ca.com/premium.../downloads/gateway/etavgateway_70.asp eTrust Antivirus for the Gateway r7.1 (all modules and platforms) http://supportconnectw.ca.com/premium.../downloads/gateway/etavgateway_71.asp eTrust Secure Content Manager (all releases) http://supportconnectw.ca.com/premium...t_scm/downloads/etrustscm_updates.asp eTrust Intrusion Detection (all releases) http://supportconnectw.ca.com/premium...rusion/downloads/eid-solpatch_r30.asp EZ-Armor versions 2.0 / 2.3 / 2.4 and EZ-Antivirus versions 6.1 / 6.2 / 6.3: http://crm.my-etrust.com/login.asp?us...arget=DOCUMENT&openparameter=2220 BrightStor ARCserve Backup (BAB) r11.1 Windows: http://supportconnectw.ca.com/premium...ownloads/nt/111/basb111-patchmenu.asp ZoneAlarm products: An updated version is available via the "Update Now..." feature. Provided and/or discovered by: Discovered by anonymous person and reported via iDEFENSE. Changelog: 2004-11-16: Added certain Zone Labs products as affected. Original Advisory: CA: http://supportconnectw.ca.com/public/ca_common_docs/arclib_vuln.asp Zone Labs: http://download.zonelabs.com/bin/free/securityAlert/17.html iDEFENSE: http://www.idefense.com/application/poi/display?id=153&type=vulnerabilities

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