CVE-2015-8960

 

Published at: - 21-09-2016 04:59

Last modified: - 30-01-2023 06:33

Total changes: - 12

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

 

Verification logic

 

Reference

• https://www.usenix.org/system/files/conference/woot15/woot15-paper-hlauschek.pdf
• http://twitter.com/matthew_d_green/statuses/630908726950674433
• [oss-security] 20160920 Re: Possible CVE for TLS protocol issue-Mailing List, Technical Description, Third Party Advisory
• https://kcitls.org
• 93071-Broken Link, Third Party Advisory, VDB Entry
• https://security.netapp.com/advisory/ntap-20180626-0002/

 

Keywords

NVD

 

CVE-2015-8960

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures