June 12, 2007
Microsoft Internet Explorer is prone to a memory-corruption vulnerability when accessing objects that are improperly instantiated or deleted.
An attacker may exploit this issue by enticing victims into opening a maliciously crafted webpage.
Successfully exploiting this issue allows remote attackers to execute arbitrary machine code in the context of the affected application, facilitating the remote compromise of affected computers.
- Avaya CIE 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
- Microsoft Internet Explorer 5.0
- Microsoft Internet Explorer 5.0.1
- Microsoft Internet Explorer 5.0.1 SP1
- Microsoft Internet Explorer 5.0.1 SP2
- Microsoft Internet Explorer 5.0.1 SP3
- Microsoft Internet Explorer 5.0.1 SP4
- Microsoft Internet Explorer 6.0
- Microsoft Internet Explorer 6.0 SP1
- Microsoft Internet Explorer 7.0
- Nortel Networks Centrex IP Client Manager
- Nortel Networks Centrex IP Client Manager 7.0.0
- Nortel Networks Centrex IP Client Manager 8.0.0
- Nortel Networks Centrex IP Client Manager 9.0
Do not follow links provided by unknown or untrusted sources.
Users should be wary of visiting sites of questionable integrity or following links provided by unfamiliar or suspicious sources.
Set web browser security to disable the execution of script code or active content.
Disabling scripting and active content in the Internet Zone may limit exposure to this and other vulnerabilities.
Implement multiple redundant layers of security.
Various memory-protection schemes (such as nonexecutable and randomly mapped memory segments) may hinder an attacker's ability to exploit this vulnerability to execute arbitrary code.
Run all software as a nonprivileged user with minimal access rights.
To limit the impact of latent vulnerabilities, run the browser as an unprivileged user with minimal access rights.
Microsoft has released an advisory along with fixes to address this issue. Please see the references for more information.
Sam Thomas working with Tipping Point and the Zero Day Initiative is credited with discovering this issue.
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