CVE-2015-0205
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…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 22.3%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 2.0
- 5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N
- EPSS
- 22.34% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-310
- Affected
- openssl/openssl
- Source
- secalert@redhat.com
EPSS 22.3% since 4 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.