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Yahoo! Messenger YVerInfo.dll ActiveX Control Buffer Overflows
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Secunia Advisory:
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SA26579
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Release Date:
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2007-08-30
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Last Update:
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2007-09-04
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Popularity:
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13,839 views
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Critical:
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Moderately critical
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Impact:
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System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | Yahoo! Messenger 8.x
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Binary Analysis:
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BA219 :: Available for 1 Credit 
BA221 :: Available for 1 Credit
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| CVE reference: | CVE-2007-4515
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Description:
Some vulnerabilities have been reported in Yahoo! Messenger, which can be exploited by malicious people to compromise a user's system.
The vulnerabilities are caused due to boundary errors within the YVerInfo.GetInfo.1 and YVerInfo.GetInfo2.1 ActiveX controls (YVerInfo.dll) when handling the "fvCom()" and "info()" methods. These can be exploited to cause stack-based buffer overflows by passing specially-crafted, overly long arguments to the affected methods.
Successful exploitation allows execution of arbitrary code, but requires a malicious web page is in a domain that contains a ".yahoo." substring in the subdomain of the TLD (e.g. via a cross-site scripting vulnerability or by manipulating the DNS resolution).
The vulnerabilities are reported in YVerInfo.dll versions prior to 2007.8.27.1 included in Yahoo! Messenger 8.1 downloaded before 2007-08-29.
Solution:
Update to version 8.1.0.419.
http://messenger.yahoo.com/download.php
Provided and/or discovered by:
Discovered by an anonymous person and reported via iDefense Labs.
Changelog:
2007-08-31: Updated Advisory with information from iDefense Labs. Updated "Criticality".
2007-09-04: Updated "Description" and "Extended Solution" sections based on additional information from Secunia Research.
Original Advisory:
Yahoo:
http://messenger.yahoo.com/security_update.php?id=082907
iDefense Labs:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=591
Extended Solution:
The "Extended Solution" section is available for Secunia customers only. Request a trial and get access to the Secunia Customer Area and Extended Secunia advisories.
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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