tdoran
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join:2003-09-27
Ridge, NY
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Cisco Security Advisory: Multiple Vulnerabilities in Cisco IOS W
Title: Cisco Security Advisory: Multiple Vulnerabilities in Cisco IOS While Processing SSL Packets
URL:
»www.cisco.com/en/US/customer/pro···49.shtml
(available to registered users)
»www.cisco.com/en/US/products/pro···49.shtml
(available to non-registered users)
Posted: May 22, 2007
Summary: Cisco IOS device may crash while processing malformed Secure Sockets Layer (SSL) packets. In order to trigger these vulnerabilities, a malicious client must send malformed packets during the SSL protocol exchange with the vulnerable device.
Successful repeated exploitation of any of these vulnerabilities may lead to a sustained Denial-of-Service (DoS); however, vulnerabilities are not known to compromise either the confidentiality or integrity of the data or the device. These vulnerabilities are not believed to allow an attacker will not be able to decrypt any previusly encrypted information.
Cisco IOS is affected by the following vulnerabilities:
* Processing ClientHello messages, documented as Cisco bug ID CSCsb12598
* Processing ChangeCipherSpec messages, documented as Cisco bug ID CSCsb40304
* Processing Finished messages, documented as Cisco bug ID CSCsd92405
Cisco has made free software available to address these vulnerabilities for affected customers.
There are workarounds available to mitigate the effects of these vulnerabilities.
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