Microsoft Internet Explorer contains a use-after-free vulnerability in the iepeers.dll
file, which may allow a remote, unauthenticated attacker to execute arbitrary code.
Microsoft Internet Explorer provides support for Web Folders and printing through the use of the iepeers.dll component. According to Microsoft Security Advisory (981374), the iepeers.dll
contains a vulnerability in the use of a pointer after an object is freed. Microsoft reports that the vulnerability, which affects Internet Explorer 6 and 7, has been reported publicly.
Exploit code for this vulnerability is publicly available. This vulnerability is currently being exploited in the wild.
By convincing a user to load a specially crafted HTML document or Microsoft Office document, a remote, unauthenticated attacker may be able to execute arbitrary code or cause a denial-of-service condition.
Apply an update
This issue is addressed in Microsoft Security Bulletin MS10-018, which modifies the way Internet Explorer handles objects in memory.
Enable Data Execution Prevention (DEP) on Internet Explorer 6 or Internet Explorer 7
Microsoft has published more information on DEP as a mitigation for this vulnerability. DEP should not be treated as a complete workaround, but DEP can mitigate the execution of attacker-supplied code in some cases. Microsoft has published detailed technical information about DEP in Security Research & Defense blog posts βUnderstanding DEP as a mitigation technologyβ part 1 and part 2. Use of DEP should be considered in conjunction with other mitigations described in this document.
Set the Internet zone security setting to βHighβ
Setting the Internet zone security setting to βHighβ will result in the user being prompted before running ActiveX controls and Active Scripting, which may reduce the risk of certain attack vectors.
Disable Active Scripting
Disabling Active Scripting will prevent Active Scripting from running, which may reduce the risk of certain attack vectors.
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Updated: March 09, 2010
Affected
We have not received a statement from the vendor.
Please see Microsoft Security Advisory (981374).
Group | Score | Vector |
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Base | ||
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Environmental |
Thanks to Microsoft for reporting this vulnerability.
This document was written by Will Dormann.
CVE IDs: | CVE-2010-0806 |
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Severity Metric: | 28.55 Date Public: |