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Category:   Application (Security)  >   Kaspersky Anti-Virus Vendors:   Kaspersky Lab
Kaspersky Anti-Virus Scanning Engine PE File Infinite Loop Lets Remote Users Deny Service
SecurityTracker Alert ID:  1017476
SecurityTracker URL:
CVE Reference:   CVE-2007-0125   (Links to External Site)
Updated:  May 20 2008
Original Entry Date:  Jan 7 2007
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to January 2, 2007
Description:   A vulnerability was reported in Kaspersky Anti-Virus. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create a PE file with a specially crafted Optional Windows Header section 'NumberOfRvaAndSizes' field value that, when processed by the target system, will cause the target scanning engine to enter an infinite loop.

The vendor was notified on December 12, 2006.

iDefense reported this vulnerability.

Impact:   A remote user can create a file that, when processed by the target system, will cause denial of service conditions on the target system.
Solution:   The vendor has issued a fix as of January 2, 2007, available automatically via the signature-update function.
Vendor URL: (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Any), Windows (Any)

Message History:   None.

 Source Message Contents

Subject:  iDefense Security Advisory 01.05.07: Kaspersky Antivirus Scan Engine

Kaspersky Antivirus Scan Engine PE File Denial of Service Vulnerability

iDefense Security Advisory 01.05.07
Jan 05, 2007


Kaspersky Antivirus is a popular client and gateway virus scanner.  For
more information see their site:


Remote exploitation of a DoS vulnerability in Kaspersky Lab's Antivirus
could allow an attacker to cause a denial of service (DoS) condition.

Kaspersky Antivirus is vulnerable to a DoS condition when processing a
specially crafted PE (portable executable) file. One of the headers in a PE
file is the Optional Windows Header section. This section of the PE header
contains information needed by the Windows linker and loader. An invalid
value for the 'NumberOfRvaAndSizes' field will cause Kaspersky to
repeatedly seek and read from the same section of the file in an endless


Exploitation allows attackers to send the scanning engine into an infinite
loop. Further attempts to scan files will be prevented.

Exploitation requires that an attacker sends a specially constructed PE
file through an e-mail gateway or personal anti-virus client using the
Kaspersky scanning engine.


iDefense has confirmed the existence of this vulnerability in Kaspersky
Labs Antivirus Engine version 6.0 for Windows and 5.5-10 for Linux.
Previous versions may also be affected. Any products that use the scanning
engine are also affected. This includes the Kaspersky mail gateway scanner.


iDefense is currently unaware of any effective workarounds for this issue.


Kaspersky Lab reports that it has fixed this vulnerability as of January
2nd, 2007. In addition, they stated the following.

"There is no need to download any special patches. All installed Kaspersky
Lab products are updated automatically through the regular signature-update
functionality. There is not need to contact Kaspersky Lab to obtain this


A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not
been assigned yet.


12/12/2006  Initial vendor notification
12/12/2006  Initial vendor response
01/05/2007  Coordinated public disclosure


The discoverer of this vulnerability wishes to remain anonymous.

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Disclaimer: The information in the advisory is believed to be accurate at
the time of publishing based on currently available information. Use of
the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
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