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CVE-2015-8960 Detail

Description

The TLS protocol 1.2 and earlier supports the rsa_fixed_dh, dss_fixed_dh, rsa_fixed_ecdh, and ecdsa_fixed_ecdh values for ClientCertificateType but does not directly document the ability to compute the master secret in certain situations with a client secret key and server public key but not a server secret key, which makes it easier for man-in-the-middle attackers to spoof TLS servers by leveraging knowledge of the secret key for an arbitrary installed client X.509 certificate, aka the "Key Compromise Impersonation (KCI)" issue.


Metrics

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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://twitter.com/matthew_d_green/statuses/630908726950674433 Press/Media Coverage  Technical Description  Third Party Advisory 
http://www.openwall.com/lists/oss-security/2016/09/20/4 Mailing List  Technical Description  Third Party Advisory 
http://www.securityfocus.com/bid/93071 Broken Link  Third Party Advisory  VDB Entry 
https://kcitls.org Exploit  Technical Description 
https://security.netapp.com/advisory/ntap-20180626-0002/ Third Party Advisory 
https://www.usenix.org/system/files/conference/woot15/woot15-paper-hlauschek.pdf Exploit  Mitigation  Technical Description 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-295 Improper Certificate Validation cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

6 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2015-8960
NVD Published Date:
09/20/2016
NVD Last Modified:
01/30/2023
Source:
Red Hat, Inc.