Cisco Gigabit Ethernet Switch Module for HP BladeSystem p-Class Release Notes, Cisco IOS Release 12.2(35)SE and later

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Cisco Gigabit Ethernet Switch Module for HP BladeSystem p-Class Release Notes, Cisco IOS Release 12.2(35)SE and later
383623-007
Resolved Caveats
• CSCei63394
When an IEEE 802.1x restricted VLAN is configured on a port and a hub with multiple devices are
connected to that port, syslog messages are now generated.
This is not a supported configuration. Only one host should be connected to an IEEE 802.1x
restricted VLAN port.
• CSCsb12598
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 previously 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.
This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20070522-SSL.shtml.
Note Another related advisory has been posted with this advisory. This additional advisory also
describes a vulnerability related to cryptography that affects Cisco IOS. This related advisory is
available at the following link:
http://www.cisco.com/warp/public/707/cisco-sa-20070522-crypto.shtml.
A combined software table for Cisco IOS is available to aid customers in choosing a software
releases that fixes all security vulnerabilities published as of May 22, 2007. This software table is
available at the following link:
http://www.cisco.com/warp/public/707/cisco-sa-20070522-cry-bundle.shtml.
• CSCsb40304
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 previously 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.