What’s Vulnerable › Vulnerabilities

CVE-2016-1000340

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-06-04 · updated 2026-06-17
• Weakness: CWE-19

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.

Affected products

• Legion of the Bouncy Castle Inc. BC-JAVA: from 1.51 through 1.55

References

• https://access.redhat.com/errata/RHSA-2018:2669
• https://access.redhat.com/errata/RHSA-2018:2927
• https://github.com/bcgit/bc-java/commit/790642084c4e0cadd47352054f868cc8397e2c00#diff-e5934feac8203ca0104ab291a3560a31
• https://security.netapp.com/advisory/ntap-20181127-0004/
• https://www.oracle.com/security-alerts/cpuoct2020.html
• https://access.redhat.com/errata/RHSA-2018:2669
• https://access.redhat.com/errata/RHSA-2018:2927
• https://github.com/bcgit/bc-java/commit/790642084c4e0cadd47352054f868cc8397e2c00#diff-e5934feac8203ca0104ab291a3560a31
• https://security.netapp.com/advisory/ntap-20181127-0004/
• https://www.oracle.com/security-alerts/cpuoct2020.html

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