CommuniCrypt Mail <= 1.16 ANSMTP/AOSMTP ActiveX Control Buffer Overflow
Vulnerability Description
CommuniCrypt Mail versions up to and including 1.16 contains a stack-based buffer overflow vulnerability in its ANSMTP.dll and AOSMTP.dll ActiveX controls, specifically within the AddAttachments() method. This method fails to properly validate the length of input strings, allowing data to exceed the bounds of a fixed-size stack buffer. When invoked with an overly long string, the control can corrupt adjacent memory structures, including exception handlers, leading to potential control flow disruption.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Lincoln
References
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/browser/communicrypt_mail_activex.rb
- https://www.exploit-db.com/exploits/12663
- https://www.broadcom.com/support/security-center/attacksignatures/detail?asid=24374
- https://softwarelode.com/4185/details-communicrypt-mail.html
- https://www.fortiguard.com/encyclopedia/ips/23099
- https://www.vulncheck.com/advisories/communicrypt-mail-activex-control-buffer-overflow
Affected Vendor
CommuniCrypt Software
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