Vulnerability CVE-2015-0205
Published: 2015-01-08   Modified: 2015-01-09

Description:
The ssl3_get_cert_verify function in s3_srvr.c in OpenSSL 1.0.0 before 1.0.0p and 1.0.1 before 1.0.1k accepts client authentication with a Diffie-Hellman (DH) certificate without requiring a CertificateVerify message, which allows remote attackers to obtain access without knowledge of a private key via crafted TLS Handshake Protocol traffic to a server that recognizes a Certification Authority with DH support.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
OpenSSL 1.0.1j Multiple Vulnerabilities
Multiple Authors
10.01.2015

Type:

CWE-310

 (Cryptographic Issues)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Openssl -> Openssl 

 References:
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10679
http://lists.fedoraproject.org/pipermail/package-announce/2015-January/147938.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-January/148363.html
http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00021.html
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00027.html
http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00026.html
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00037.html
http://marc.info/?l=bugtraq&m=142721102728110&w=2
http://marc.info/?l=bugtraq&m=143748090628601&w=2
http://marc.info/?l=bugtraq&m=144050155601375&w=2
http://marc.info/?l=bugtraq&m=144050205101530&w=2
http://marc.info/?l=bugtraq&m=144050254401665&w=2
http://marc.info/?l=bugtraq&m=144050297101809&w=2
http://rhn.redhat.com/errata/RHSA-2015-0066.html
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150310-ssl
http://www.debian.org/security/2015/dsa-3125
http://www.mandriva.com/security/advisories?name=MDVSA-2015:019
http://www.mandriva.com/security/advisories?name=MDVSA-2015:062
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html
http://www.oracle.com/technetwork/topics/security/cpuapr2015-2365600.html
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
http://www.securityfocus.com/bid/71941
http://www.securityfocus.com/bid/91787
http://www.securitytracker.com/id/1033378
https://bto.bluecoat.com/security-advisory/sa88
https://exchange.xforce.ibmcloud.com/vulnerabilities/99708
https://github.com/openssl/openssl/commit/1421e0c584ae9120ca1b88098f13d6d2e90b83a3
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150888
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380
https://kc.mcafee.com/corporate/index?page=content&id=SB10102
https://kc.mcafee.com/corporate/index?page=content&id=SB10108
https://support.citrix.com/article/CTX216642
https://www.openssl.org/news/secadv_20150108.txt
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