Date Discovered August 14, 2007
Description Microsoft Internet Explorer is prone to a remote code-execution vulnerability because the application fails to properly handle certain CSS data.
An attacker may exploit this issue by enticing victims into opening a maliciously crafted HTML document.
Successful exploits may allow an attacker to execute arbitrary code in the context of the user running the vulnerable application.
This issue affects Internet Explorer 5.01 SP4 running on Microsoft Windows 2000 SP4.
- Avaya CIE 1.0
- Avaya CIE 1.0.2
- Avaya Customer Interaction Express (CIE) Server 1.0
- Avaya Messaging Application Server
- Avaya Messaging Application Server MM 2.0
- Avaya Messaging Application Server MM 3.0
- Avaya Messaging Application Server MM 3.1
- HP Storage Management Appliance 2.1
- HP Storage Management Appliance I
- HP Storage Management Appliance II
- HP Storage Management Appliance III
- Microsoft Internet Explorer 5.0.1 SP4
Run all software as a nonprivileged user with minimal access rights. To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.
Do not follow links provided by unknown or untrusted sources. Attackers could exploit this vulnerability by enticing a user to visit a malicious website. Do not follow links provided by sources of questionable integrity.
Set web browser security to disable the execution of script code or active content. Disable support for script code and active content within a client browser. Note that this mitigation tactic might adversely affect legitimate websites that rely on the execution of browser-based script code.
Implement multiple redundant layers of security. Since this issue may be leveraged to execute code, we recommend memory-protection schemes, such as nonexecutable stack/heap configurations and randomly mapped memory segments. This tactic may complicate exploits of memory-corruption vulnerabilities.
Review and adjust according to policy any default configuration settings.
To limit the possibility of remote exploits through email, configure email client applications to view messages as plain text.
Microsoft released security bulletin MS07-045 and fixes to address this issue. Please see the referenced bulletin for details on obtaining and applying fixes.
Credits Hu Qianwei of NSFocus Security Team is credited with discovering this issue.
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