Vulnerability Details : CVE-2015-8960
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.
Exploit prediction scoring system (EPSS) score for CVE-2015-8960
Probability of exploitation activity in the next 30 days: 0.64%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 76 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2015-8960
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST |
8.1
|
HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
2.2
|
5.9
|
NIST |
CWE ids for CVE-2015-8960
-
The product does not validate, or incorrectly validates, a certificate.Assigned by: nvd@nist.gov (Primary)
References for CVE-2015-8960
-
http://www.securityfocus.com/bid/93071
TLS CVE-2015-8960 Man in the Middle Security Bypass VulnerabilityBroken Link;Third Party Advisory;VDB Entry
-
https://kcitls.org
KCI Attacks against TLSExploit;Technical Description
-
https://www.usenix.org/system/files/conference/woot15/woot15-paper-hlauschek.pdf
Exploit;Mitigation;Technical Description
-
https://security.netapp.com/advisory/ntap-20180626-0002/
CVE-2015-8960 TLS Vulnerability in NetApp Products | NetApp Product SecurityThird Party Advisory
-
http://www.openwall.com/lists/oss-security/2016/09/20/4
oss-security - Re: Possible CVE for TLS protocol issueMailing List;Technical Description;Third Party Advisory
-
http://twitter.com/matthew_d_green/statuses/630908726950674433
Matthew Green on Twitter: "This attack is hilarious. Install a client cert in a browser, MITM any connection it makes to certain servers. https://t.co/A1O2bQTOiE"Press/Media Coverage;Technical Description;Third Party Advisory
Products affected by CVE-2015-8960
- cpe:2.3:a:ietf:transport_layer_security:*:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:snap_creator_framework:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:snapdrive:-:*:*:*:*:unix:*:*
- cpe:2.3:a:netapp:snapdrive:-:*:*:*:*:windows:*:*
- cpe:2.3:a:netapp:snapmanager:-:*:*:*:*:oracle:*:*
- cpe:2.3:a:netapp:snapmanager:-:*:*:*:*:sap:*:*
- cpe:2.3:a:netapp:data_ontap_edge:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:clustered_data_ontap_antivirus_connector:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:host_agent:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:smi-s_provider:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:oncommand_shift:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:snapprotect:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:plug-in_for_symantec_netbackup:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:system_setup:-:*:*:*:*:*:*:*