Advisory Details

January 20th, 2011

Icon Labs Iconfidant SSL Server Key Length Remote Code Execution Vulnerability

ZDI-11-021
ZDI-CAN-403

CVE ID
CVSS SCORE 10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS Icon Labs
AFFECTED PRODUCTS Iconfidant SSL
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 8034. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Icon Labs Iconfidant SSL Server. Authentication is not required to exploit this vulnerability.

The specific flaw exists in the functionality responsible for key exchange. If the sum of specific length fields within a client master key packet exceeds 0x4000, a static buffer can be overflowed leading to arbitrary code execution on the affected system.

ADDITIONAL DETAILS

Icon Labs states that this issue was first fixed in Iconfidant SSL 1.3.0 and recommends upgrading to Iconfidant 1.3.1. Please contact Icon Labs at support@icon-labs.com to update the latest Iconfidant SSL software.
"Icon Labs would like to thank an Anonymous researcher and TippingPoint's Zero Day Initiative for responsibly reporting this vulnerability, ZDI-CAN-403."


DISCLOSURE TIMELINE
  • 2008-10-28 - Vulnerability reported to vendor
  • 2011-01-20 - Coordinated public release of advisory
CREDIT Anonymous
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