October 13, 2015
Microsoft VBScript and JScript are prone to multiple remote memory-corruption vulnerabilities. Attackers can exploit these issues by enticing an unsuspecting user to view a specially crafted webpage. Attackers can exploit these issues to execute arbitrary code in the context of the currently logged-in user. Failed attacks will cause denial-of-service conditions. Note: This issue was previously titled ‘Microsoft VBScript and JScript CVE-2015-6055 Remote Memory Corruption Vulnerability’. The title and technical details have been changed to better reflect the underlying component affected.
- Microsoft Internet Explorer 10
- Microsoft Internet Explorer 11
- Microsoft Internet Explorer 8
- Microsoft Internet Explorer 9
- Microsoft JScript 5.7
- Microsoft JScript 5.8
- Microsoft VBScript 5.7
- Microsoft VBScript 5.8
- Microsoft Windows Server 2008 for 32-bit Systems SP2
- Microsoft Windows Server 2008 for Itanium-based Systems SP2
- Microsoft Windows Server 2008 for x64-based Systems SP2
- Microsoft Windows Vista Service Pack 2
- Microsoft Windows Vista x64 Edition Service Pack 2
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.
Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits
Do not follow links provided by unknown or untrusted sources.
Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources.
Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.
Implement multiple redundant layers of security.
Memory-protection schemes (such as nonexecutable stack and heap configurations and randomly mapped memory segments) will complicate exploits of memory-corruption vulnerabilities.
Updates are available. Please see the references or vendor advisory for more information.
An anonymous researcher and Simon Zuckerbraun working with HP’s Zero Day Initiative
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