SB2018060416 - Cryptographic issues in Bouncy Castle

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Main Vulnerability Database SB2018060416

SB2018060416 - Cryptographic issues in Bouncy Castle

Published: June 4, 2018 Updated: July 5, 2018

Security Bulletin ID SB2018060416
Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Cryptographic issues (CVE-ID: CVE-2016-1000340)

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists in Bouncy Castle JCE Provider due to buggy 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.


Remediation

Install update from vendor's website.

References