CVE-2016-1000340

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.

How to fix CVE-2016-1000340

To remediate CVE-2016-1000340, upgrade the affected package to a fixed version below.

• —upgrade to 1.56-1 or later
• —upgrade to 1.56 or later
• —upgrade to 1.56 or later
• —upgrade to 1.56 or later

Is CVE-2016-1000340 being exploited?

Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.

Affected packages (4)

• from 0, < 1.56-1
• >= 1.51, < 1.56
• >= 1.51, < 1.56
• >= 1.51, < 1.56

CVSS scores

References (9)

• ADVISORYgithub.com/advisories/GHSA-r97x-3g8f-gx3m
• ADVISORYnvd.nist.gov/vuln/detail/CVE-2016-1000340
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2016-1000340
• PATCHgithub.com/bcgit/bc-java
• WEB