Microsoft XML Core Services Uninitialized Object Access (June 22, 2012)

Microsoft XML Core Services (MSXML) is a set of services that allow building Windows-native XML-based applications. All MSXML products are exposed as Component Object Model (COM) objects. Each version of MSXML exposes its own set of CLSIDs and ProgIDs.

A memory corruption vulnerability exists in Microsoft XML Core Services. Specifically, the vulnerable MSXML objects fail to handle parameter exceptions when certain method is invocated. A remote attacker can exploit this vulnerability by enticing a user to open a specially crafted web page. Successful exploitation could result in arbitrary code execution in the context of the currently logged-in user. Failed attacks will cause denial-of-service conditions.

The vulnerability has been assigned as CVE-2012-1889.

SonicWALL has released multiple IPS signatures to detect and block specific exploitation attempts targeting this vulnerability. The signatures are listed below:

• 7967 Microsoft XML Core Services Uninitialized Object Access 1

• 7968 Microsoft XML Core Services Uninitialized Object Access 2

• 7969 Microsoft XML Core Services Uninitialized Object Access 3

• 7970 Microsoft XML Core Services Uninitialized Object Access 4

• 7971 Microsoft XML Core Services Uninitialized Object Access 5

• 8007 Microsoft XML Core Services Uninitialized Object Access 6

• 8008 Microsoft XML Core Services Uninitialized Object Access 7

• 8009 Microsoft XML Core Services Uninitialized Object Access 8

• 8010 Microsoft XML Core Services Uninitialized Object Access 9

• 8011 Microsoft XML Core Services Uninitialized Object Access 10

• 8012 Microsoft XML Core Services Uninitialized Object Access 11

• 8013 Microsoft XML Core Services Uninitialized Object Access 12

Security News

The SonicWall Capture Labs Threat Research Team gathers, analyzes and vets cross-vector threat information from the SonicWall Capture Threat network, consisting of global devices and resources, including more than 1 million security sensors in nearly 200 countries and territories. The research team identifies, analyzes, and mitigates critical vulnerabilities and malware daily through in-depth research, which drives protection for all SonicWall customers. In addition to safeguarding networks globally, the research team supports the larger threat intelligence community by releasing weekly deep technical analyses of the most critical threats to small businesses, providing critical knowledge that defenders need to protect their networks.