Quiksoft EasyMail SMTP ActiveX control stack buffer overflow vulnerabilities

2007-08-29T00:00:00
ID VU:281977
Type cert
Reporter CERT
Modified 2007-08-30T20:08:00

Description

Overview

The Quiksoft EasyMail SMTP ActiveX control contains multiple stack buffer overflow vulnerabilities, which could allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

Description

Quiksoft EasyMail Objects is a set of ActiveX controls that provides email functionality, including SMTP, POP3, and IMAP4. The EasyMail SMTP ActiveX control, which is provided by emsmtp.dll, contains multiple stack buffer overflow vulnerabilities.

This control is bundled with several applications, including Earthlink internet access software. Exploit code for this vulnerability is publicly available.


Impact

A remote, unauthenticated attacker may be able to execute arbitrary code on a vulnerable system with privileges of the user.


Solution

We are currently unaware of a practical solution to this problem. Please consider the following workarounds


Disable the Quiksoft EasyMail ActiveX control in Internet Explorer

The vulnerable ActiveX control can be disabled in Internet Explorer by setting the kill bit for the following CLSID:

{68AC0D5F-0424-11D5-822F-00C04F6BA8D9}
More information about how to set the kill bit is available in Microsoft Support Document 240797. Alternatively, the following text can be saved as a .REG file and imported to set the kill bit for this control:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{68AC0D5F-0424-11D5-822F-00C04F6BA8D9}]
"Compatibility Flags"=dword:00000400
Disable ActiveX

Disabling ActiveX controls in the Internet Zone (or any zone used by an attacker) appears to prevent exploitation of this and other ActiveX vulnerabilities. Instructions for disabling ActiveX in the Internet Zone can be found in the "Securing Your Web Browser" document.


Vendor Information

281977

Filter by status: All Affected Not Affected Unknown

Filter by content: __ Vendor has issued information

__ Sort by: Status Alphabetical

Expand all

Affected Unknown __ Unaffected

Javascript is disabled. Click here to view vendors.

__ Earthlink

Notified: April 16, 2007 Updated: August 29, 2007

Status

__ Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Please disable the vulnerable ActiveX control.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

__ Gate Comm Software

Updated: August 29, 2007

Status

__ Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Please disable the vulnerable ActiveX control.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

__ Quiksoft

Notified: February 08, 2007 Updated: August 29, 2007

Status

__ Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Please disable the vulnerable ActiveX control.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

CVSS Metrics

Group | Score | Vector
---|---|---
Base | N/A | N/A
Temporal | N/A | N/A
Environmental | | N/A

References

  • <http://www.quicksoftcorp.com/objects/>
  • <http://www.quicksoftcorp.com/clients/whouses.asp>

Credit

This vulnerability was reported by Will Dormann of the CERT/CC. The vulnerability was also independently discovered and publicly disclosed by rgod.

This document was written by Will Dormann.

Other Information

CVE IDs: | None
---|---
Severity Metric:** | 25.82
Date Public:
| 2007-08-27
Date First Published: | 2007-08-29
Date Last Updated: | 2007-08-30 20:08 UTC
Document Revision: | 5