Cisco ASA SSL 3.0 Protocol Downgrade Flaw Lets Remote Users Decrypt SSL Traffic
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SecurityTracker Alert ID: 1031089 |
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SecurityTracker URL: http://securitytracker.com/id/1031089
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CVE Reference:
CVE-2014-3566
(Links to External Site)
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Date: Oct 21 2014
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Impact:
Disclosure of system information, Disclosure of user information
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Vendor Confirmed: Yes Exploit Included: Yes
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Description:
A vulnerability was reported in Cisco ASA. A remote user can decrypt SSL sessions in certain cases.
A remote user can with the ability to conduct a man-in-the-middle attack can force a client to negotiate a downgrade to SSLv3 instead of a TLS v1.x protocol and then conduct a BEAST-style of attack to decrypt portions of the session.
This protocol vulnerability is referred to as the POODLE ("Padding Oracle On Downgraded Legacy Encryption") vulnerability.
This is a flaw in the protocol rather than in the SSL implementation.
Cisco has assigned bug ID CSCur23709 to this vulnerability.
The original advisory is available at:
https://www.openssl.org/~bodo/ssl-poodle.pdf
Bodo Moller, Thai Duong, and Krzysztof Kotowicz reported this vulnerability.
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Impact:
A remote user with the ability to conduct a man-in-the-middle attack can decrypt SSL sessions.
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Solution:
No solution was available at the time of this entry.
The vendor's advisory is available at:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20141015-poodle
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Vendor URL: tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20141015-poodle (Links to External Site)
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Cause:
Access control error
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Message History:
None.
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Source Message Contents
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[Original Message Not Available for Viewing]
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