US-CERT Technical Cyber Security Alert TA05-102A — Multiple Vulnerabilities in Microsoft Windows Components

Overview

Microsoft has released a Security Bulletin Summary for April, 2005. This summary includes several bulletins that address vulnerabilities in various Windows applications and components. Exploitation of some vulnerabilities can result in the remote execution of arbitrary code by a remote attacker. Details of the vulnerabilities and their impacts are provided below.

I. Description

The list below provides a mapping between Microsoft’s Security Bulletins and the related US-CERT Vulnerability Notes. More information related to the vulnerabilities is available in these documents.

Microsoft Security Bulletin MS05-020: Cumulative Security Update for Internet Explorer (890923)

VU#774338 Microsoft Internet Explorer DHTML objects contain a race condition

VU#756122 Microsoft Internet Explorer URL validation routine contains a buffer overflow

VU#222050 Microsoft Internet Explorer Content Advisor contains a buffer overflow

Microsoft Security Bulletin MS05-02: Vulnerability in Exchange Server Could Allow Remote Code Execution (894549)

VU#275193 Microsoft Exchange Server contains unchecked buffer in SMTP extended verb handling

Microsoft Security Bulletin MS05-022: Vulnerability in MSN Messenger Could Lead to Remote Code Execution (896597)

VU#633446 Microsoft MSN Messenger GIF processing buffer overflow

Microsoft Security Bulletin MS05-019: Vulnerabilities in TCP/IP Could Allow Remote Code Execution and Denial of Service (893066)

VU#233754 Microsoft Windows does not adequately validate IP packets

II. Impact

Exploitation of these vulnerabilities may permit a remote attacker to execute arbitrary code on a vulnerable Windows system, or cause a denial-of-service condition.

III. Solution

Apply a patch.

Microsoft has provided the patches for these vulnerabilities in the Security Bulletins and on Windows Update.