Published:2008/08/12  Last Updated:2008/08/12

Virus Security and Virus Security ZERO denial of service (DoS) vulnerability


Virus Security and Virus Security ZERO provided by SOURCENEXT CORPORATION contain a denial of service (DoS) vulnerability.

Products Affected

  • Virus Security version 9.5.0173 and earlier
  • Virus Security ZERO version 9.5.0173 and earlier


Virus Security and Virus Security ZERO are anti-virus software provided by SOURCENEXT CORPORATION. Virus Security and Virus Security ZERO contain a denial of service (DoS) vulnerability as they do not properly handle malicious compressed files when scanning.


The software may not function after scanning malicious compressed files.


Update the Software
Apply the latest updates provided by the vendor.

Vendor Status

Vendor Status Last Update Vendor Notes
SOURCENEXT CORPORATION Vulnerable 2008/08/12


  1. IPA
    Security Alert for Vulnerability in Virus Security and Virus Security ZERO

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2008.08.12

Measures Conditions Severity
Access Required Routed - can be attacked over the Internet using packets
  • High
Authentication None - anonymous or no authentication (IP addresses do not count)
  • High
User Interaction Required None - the vulnerability can be exploited without an honest user taking any action
  • High
Exploit Complexity Low-Medium - some expertise and/or luck required (most buffer overflows, guessing correctly in small space, expertise in Windows function calls)
  • Medium-High

Description of each analysis measures

User's interaction is rated as "None" considering the automatic email scanning is activated. User's interactions may be required depending on how the malicious files are received.


Yuji Ukai of Fourteenforty Research Institute, Inc. reported this vulnerability to IPA.
JPCERT/CC coordinated with the vendor under Information Security Early Warning Partnership.

Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2008-4429
JVN iPedia JVNDB-2008-000050

Update History