CVE-2016-1000346

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.

Published: 2018-06-04 Last update: 2025-05-12 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-1000346 is rated Moderate Risk (41.7/100): CVSS Low severity, with medium exploitation likelihood (EPSS 0.99%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2016-1000346

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-23 1.11% 0.99% -0.12%
2 2026-05-22 0.96% 1.11% +0.15%
3 2026-02-23 — 0.96% —

Full EPSS history (15 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-1000346

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.7 3.0 LOW
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 1.4 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2016-1000346

GitHub Security Advisory for CVE-2016-1000346

GHSA-fjqm-246c-mwqg · Severity: low · Ecosystem: maven — In Bouncy Castle JCE Provider the other party DH public key is not fully validated

OS Trackers for CVE-2016-1000346

vendor priority summary link
debian not yet assigned CVE-2016-1000346 not yet assigned priority: Debian including 1 source packages (bouncycastle), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2016-1000346
redhat medium — https://access.redhat.com/security/cve/CVE-2016-1000346
suse medium CVE-2016-1000346 severity moderate: SUSE including 32 source package names (bouncycastle, bouncycastle-1.64-1.63, …), 34 product×package rows across 8 product lines (SUSE Linux Enterprise Module for Development Tools 15 SP2, SUSE Linux Enterprise Module for Development Tools 15 SP3, … (8 product lines)): Fixed 32, Known Not Affected 2. https://www.suse.com/security/cve/CVE-2016-1000346/
ubuntu medium CVE-2016-1000346 medium priority: Ubuntu including 1 source packages (bouncycastle), 20 status rows across 20 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 17, released 2, needed 1. https://ubuntu.com/security/CVE-2016-1000346

Affected software / configurations for CVE-2016-1000346

Vendor Product Version Raw CPE
bouncycastle bc-java <= 1.55 cpe:2.3:a:bouncycastle:bc-java:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

References for CVE-2016-1000346

cvelogic Threat Intelligence