NSFOCUS Security Advisory(SA2005-02) Topic: Microsoft IE Devenum.dll COM Instantiation Remote Code Execution Vulnerability Release Date: 2005-08-10 CVE CAN ID: CAN-2005-1990 http://www.nsfocus.com/english/homepage/research/0502.htm Affected systems & software =========================== Microsoft Internet Explorer 5.01 SP4 Microsoft Internet Explorer 5.5 SP2 Microsoft Internet Explorer 6 Microsoft Internet Explorer 6 SP1 Unaffected systems & software ============================= Description ============ NSFocus Security Team discovered a security vulnerability in Microsoft Internet Explorer. By crafting a malicious HTML page and alluring users to visit it, a remote attacker can execute arbitrary code with the privilege of the user. Internet Explorer does not properly call interface arguments when instantiating COM component in devenum.dll, resulting in exceptional memory access which might cause IE to crash. Carefully crafted HTML page might allow a remote attacker to execute arbitrary code. Workaround ============= Disable ActiveX control in Internet Explorer. Vendor Status ============== 2005.07.13 Informed the vendor. 2005.07.16 The vendor confirmed the vulnerability 2005.08.09 The vendor releases a security bulletin (MS05-038) and related patches. Detail Microsoft Security Bulletin is available at: http://www.microsoft.com/technet/security/bulletin/MS05-038.mspx Additional Information ======================== The Common Vulnerabilities and Exposures (CVE) project has assigned the name CAN-2005-1990 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems. Candidates may change significantly before they become official CVE entries. Acknowledgment =============== Hu Qianwei of NSFOCUS Security Team found the vulnerability. DISCLAIMS ========== THE INFORMATION PROVIDED IS RELEASED BY NSFOCUS "AS IS" WITHOUT WARRANTY OF ANY KIND. NSFOCUS DISCLAIMS ALL WARRANTIES, EITHER EXPRESSED OR IMPLIED, EXCEPT FOR THE WARRANTIES OF MERCHANTABILITY. IN NO EVENT SHALL NSFOCUS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF NSFOCUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. DISTRIBUTION OR REPRODUCTION OF THE INFORMATION IS PROVIDED THAT THE ADVISORY IS NOT MODIFIED IN ANY WAY. Copyright 1999-2005 NSFOCUS. All Rights Reserved. Terms of use. NSFOCUS Security Team NSFOCUS INFORMATION TECHNOLOGY CO.,LTD (http://www.nsfocus.com) PGP Key: http://www.nsfocus.com/homepage/research/pgpkey.asc Key fingerprint = F8F2 F5D1 EF74 E08C 02FE 1B90 D7BF 7877 C6A6 F6DA