TippingPoint Zero Day Initiative

IBM Lotus Domino iCalendar MAILTO Stack Overflow Vulnerability

ZDI-10-177: September 14th, 2010

CVSS Score

Affected Vendors

Affected Products

    Lotus Domino

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 6319. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on systems with vulnerable installations of IBM Lotus Domino. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the nrouter.exe service while processing a malformed e-mail. The process copies the contents of the MAILTO header within a calendar request into a fixed size stack buffer. By providing enough data this buffer can overflow leading to arbitrary code execution under the context of the SYSTEM user.

Vendor Response

IBM has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2008-08-26 - Vulnerability reported to vendor
    2010-09-14 - Coordinated public release of advisory


This vulnerability was discovered by: