7.5

CVE-2016-1000340: bouncycastle bc-java Data Processing Errors

Modified
AliasesUBUNTU-CVE-2016-1000340DEBIAN-CVE-2016-1000340CGA-2hp5-q389-mrrv
Published 04-06-2018Last modified 06-08-2024

Vulnerability summary

CVE-2016-1000340 is a high (CVSS 7.5) Data Processing Errors vulnerability in bouncycastle bc-java. EPSS estimates a 2.30% chance of exploitation in the next 30 days, higher than 83.3% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 2% (FIRST, 04-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.0 (NVD)
EPSS score
2.30%
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 3 · Related 1
MGASA-2018-0376OPENSUSE-SU-2024:10661-1RHSA-2018:2927

Timeline

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

Description

In the Bouncy Castle JCE Provider versions 1.51 to 1.55, a carry propagation bug was introduced in the implementation of squaring for several raw math classes have been fixed (org.bouncycastle.math.raw.Nat???). These classes are used by our custom elliptic curve implementations (org.bouncycastle.math.ec.custom.**), so there was the possibility of rare (in general usage) spurious calculations for elliptic curve scalar multiplications. Such errors would have been detected with high probability by the output validation for our scalar multipliers.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

2.30%

Chance of exploitation in the next 30 days

Percentile

83%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 2.29% on 05-10-2026

05-10-202604-11-2026

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.

Chainguard29 products
  • eco-java-gradle-2.10All versions (No fix recorded)
  • eco-java-gradle-2.11All versions (No fix recorded)
  • eco-java-gradle-2.12All versions (No fix recorded)
  • eco-java-gradle-2.13All versions (No fix recorded)
  • eco-java-gradle-2.14All versions (No fix recorded)
Org.bouncycastle3 products
  • bcprov-jdk14≥ 1.51, < 1.56
  • bcprov-jdk15≥ 1.51, < 1.56
  • bcprov-jdk15on≥ 1.51, < 1.56
Bouncycastle1 product
Debian1 product
  • bouncycastle< 1.56-1
Ubuntu1 product
  • bouncycastleAll versions (No fix recorded)

5 vendors · 35 products

References

12 links
Show all 12 references