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Yahoo! Messenger Denial of Service Weakness
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Secunia Advisory:
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SA20773
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Release Date:
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2006-06-22
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Last Update:
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2006-06-30
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Popularity:
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9,512 views
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Critical:
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Not critical
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Impact:
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DoS
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Where:
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From remote
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Solution Status:
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Unpatched
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| Software: | Yahoo! Messenger 7.x
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| CVE reference: | CVE-2006-3298
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Description:
Ivan Ivan has discovered a weakness in Yahoo! Messenger, which potentially can be exploited by malicious people to cause a DoS (Denial of Service).
The weakness is caused due to an error within the handling of certain messages. This can be exploited to crash another user's Yahoo! Messenger client via a specially crafted message that contains a non-ascii character.
For example:
s:[space]msg[alt+0160]:---------------------------------------------iframe onload=$InlineAction()>:)
Successful exploitation requires that the user has not configured the application to ignore malicious users that are not on his Messenger list.
The weakness has been confirmed in version 7.5.0.814. Other versions may also be affected.
Solution:
Configure Yahoo! Messenger to ignore users that are not in the Messenger list.
Provided and/or discovered by:
Ivan Ivan
Changelog:
2006-06-30: Added CVE reference.
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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.
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