7.5

CVE-2016-1000343: bouncycastle bc-java Cryptographic Issues

Modified
AliasesUBUNTU-CVE-2016-1000343DEBIAN-CVE-2016-1000343CGA-235x-9434-5wfv
Published 04-06-2018Last modified 06-08-2024

Vulnerability summary

CVE-2016-1000343 is a high (CVSS 7.5) Cryptographic Issues vulnerability in bouncycastle bc-java. EPSS estimates a 3.25% chance of exploitation in the next 30 days, higher than 88.3% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 3% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.0 (NVD)
EPSS score
3.25%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 2
DLA-1418-1MGASA-2018-0376OPENSUSE-SU-2024:10661-1RHSA-2018:2927USN-3727-1

Timeline

  1. 04-06-2018
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

In the Bouncy Castle JCE Provider version 1.55 and earlier the DSA key pair generator generates a weak private key if used with default values. If the JCA key pair generator is not explicitly initialised with DSA parameters, 1.55 and earlier generates a private value assuming a 1024 bit key size. In earlier releases this can be dealt with by explicitly passing parameters to the key pair generator.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

3.25%

Chance of exploitation in the next 30 days

Percentile

88%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 3.24% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard34 products
  • eco-java-gradle-1.11All versions (No fix recorded)
  • eco-java-gradle-2.0All versions (No fix recorded)
  • eco-java-gradle-2.1All versions (No fix recorded)
  • eco-java-gradle-2.10All versions (No fix recorded)
  • eco-java-gradle-2.11All versions (No fix recorded)
Org.bouncycastle3 products
  • bcprov-jdk14< 1.56
  • bcprov-jdk15< 1.56
  • bcprov-jdk15on< 1.56
Debian2 products
Bouncycastle1 product
Ubuntu1 product
  • bouncycastle< 1.49+dfsg-2ubuntu0.1 | All versions (No fix recorded)

5 vendors · 41 products

References

18 links
Show all 18 references