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Cisco IOS IPv4 Packet Processing Denial of Service Vulnerability
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Secunia Advisory:
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SA9288
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Release Date:
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2003-07-17
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Popularity:
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9,132 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 IOS 11.x
Cisco IOS 12.x
Cisco IOS R11.x
Cisco IOS R12.x
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Description:
A vulnerability has been identified in Cisco IOS, which can be exploited by malicious people to cause a DoS (Denial of Service) on vulnerable device.
The vulnerability is caused due to an error when processing certain IPv4 traffic. This can be exploited by sending a specially crafted sequence of IPv4 packets to the device, which erroneously may cause the device to set the input queue for the specific interface to full. This results in all further traffic being dropped by the interface.
Successful exploitation requires that processing of IPv4 packets is enabled (default setting).
Solution:
Cisco has released updated IOS versions. A patch matrix is available at the web page (in the "Software Versions and Fixes" section) referenced in "Original Advisory".
Workarounds are also detailed in the original advisory.
Original Advisory:
http://www.cisco.com/warp/public/707/cisco-sa-20030717-blocked.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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