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Cisco CSS SSL Client Certificate Handling Denial of Service
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Secunia Advisory:
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SA17260
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Release Date:
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2005-10-20
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Popularity:
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6,930 views
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Critical:
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Moderately 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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Vendor Patch
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| OS: | Cisco Content Services Switch 11500 Series
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Description:
A vulnerability has been reported in Cisco 11500 CSS (Content Services Switch), which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to a memory corruption error when processing malformed client certificate during SSL session negotiation. This can be exploited to cause the CSS to reload via a specially crafted client certificate even when the CSS did not request for a client certificate during SSL session negotiation.
Successful exploitation requires that CSS is configured to provide SSL termination services.
The vulnerability has been reported in 11500 Series CSS running version 7.1 through 7.5 of the Cisco WebNS operating system.
Solution:
Fixes are available (see patch matrix in vendor advisory).
http://www.cisco.com/en/US/products/p...visory09186a008054bc9b.shtml#software
Provided and/or discovered by:
Reported by vendor.
Original Advisory:
http://www.cisco.com/warp/public/707/cisco-sa-20051019-css.shtml
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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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