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Category:   Application (Generic)  >   7-Zip Vendors:   7-zip.org
7-Zip Buffer Overflow and Memory Read Error in Processing Files Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1035876
SecurityTracker URL:  http://securitytracker.com/id/1035876
CVE Reference:   CVE-2016-2334, CVE-2016-2335   (Links to External Site)
Date:  May 12 2016
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 16.00
Description:   Two vulnerabilities were reported in 7-Zip. A remote user can cause arbitrary code to be executed on the target system.

A remote user can create a specially crafted file that, when processed by the 7-Zip library, will trigger a heap overflow in Archive::NHfs::CHandler::ExtractZlibFile() and execute arbitrary code on the target system [CVE-2016-2334]. The code will run with the privileges of the target application using the 7-Zip library.

HFS+ file systems are affected.

A remote user can create a specially crafted Universal Disk Format (UDF) file that, when processed by the 7-Zip library, will trigger an out-of-bounds memory read error in CInArchive::ReadFileItem() and execute arbitrary code [CVE-2016-2335]. The code will run with the privileges of the target application using the 7-Zip library.

A specially crafted Long Allocation Descriptor can trigger this flaw.

The original advisory is available at:

http://blog.talosintel.com/2016/05/multiple-7-zip-vulnerabilities.html

Marcin Noga and Jaeson Schultz of Cisco TALOS reported these vulnerabilities.

Impact:   A remote user can create a file that, when loaded by the target application, will execute arbitrary code on the target system.
Solution:   The vendor has issued a fix (16.00).

No vendor advisory was available at the time of this entry.

Vendor URL:  www.7-zip.org/ (Links to External Site)
Cause:   Access control error, Boundary error
Underlying OS:  Windows (Any)

Message History:   None.


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