cve.bz

CVE-2016-1000340

7.5 highEPSS 2.3%

High (7.5) in bouncycastle bc-java. EPSS 2.3% chance of exploitation in the next 30 days. Fixed in org.bouncycastle:bcprov-jdk14 1.56.

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.

Severity

CVSS 3.0

7.5 high
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
2.3% chance of exploitation in the next 30 days; higher than 83% of CVEs (scores of 2026-10-31)
CWE
CWE-19
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-r97x-3g8f-gx3mMavenorg.bouncycastle:bcprov-jdk14>=1.51 <1.561.56
GHSA-r97x-3g8f-gx3mMavenorg.bouncycastle:bcprov-jdk15>=1.51 <1.561.56
GHSA-r97x-3g8f-gx3mMavenorg.bouncycastle:bcprov-jdk15on>=1.51 <1.561.56

References

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