Vulnerability Note VU#880916

BitZipper 2013 memory-corruption vulnerability

Original Release date: 19 Apr 2013 | Last revised: 19 Apr 2013

Overview

BitZipper 2013 contains a memory-corruption vulnerability, which may allow a remote unauthenticated attacker to execute arbitrary code on a vulnerable system.

Description

BitZipper 2013 contains a memory-corruption vulnerability, which may allow a remote unauthenticated attacker to execute arbitrary code on a vulnerable system.

Impact

By convincing a user to view a specially crafted ZIP document, an attacker may be able to execute arbitrary code on a vulnerable system.

Solution

Update

The vendor has stated that this vulnerability has been addressed in BitZipper 2013 Update 1. Users are advised to update to BitZipper 2013 Update 1 or later.

Use the Microsoft Enhanced Mitigation Experience Toolkit

The Microsoft Enhanced Mitigation Experience Toolkit (EMET) can be used to help prevent exploitation of this vulnerability. CERT/CC has created a video tutorial for setting up EMET 3.0 on Windows 7. Note that platforms that do not support ASLR, such as Windows XP and Windows Server 2003, will not receive the same level of protection that modern Windows platforms will.

Enable DEP in Microsoft Windows

Consider enabling Data Execution Prevention (DEP) in supported versions of Windows. DEP should not be treated as a complete workaround, but it can mitigate the execution of attacker-supplied code in some cases. Microsoft has published detailed technical information about DEP in Security Research & Defense blog posts "Understanding DEP as a mitigation technology" part 1 and part 2. DEP should be used in conjunction with the application of patches or other mitigations described in this document.

Note that when relying on DEP for exploit mitigation, it is important to use a system that supports Address Space Layout Randomization (ASLR) as well. ASLR is not supported by Windows XP or Windows Server 2003 or earlier. ASLR was introduced with Microsoft Windows Vista and Windows Server 2008. Please see the Microsoft SRD blog entry: On the effectiveness of DEP and ASLR for more details.

Vendor Information (Learn More)

VendorStatusDate NotifiedDate Updated
BitZipperAffected04 Mar 201316 Apr 2013
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base 4.0 AV:L/AC:H/Au:N/C:N/I:N/A:C
Temporal 2.9 E:U/RL:W/RC:UC
Environmental 0.9 CDP:L/TD:L/CR:ND/IR:ND/AR:ND

References

Credit

Thanks to Christopher Gabriel of Telos Corporation for reporting this vulnerability.

This document was written by Michael Orlando.

Other Information

  • CVE IDs: CVE-2013-0138
  • Date Public: 16 Apr 2013
  • Date First Published: 19 Apr 2013
  • Date Last Updated: 19 Apr 2013
  • Document Revision: 11

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