CVE-2016-1000342: Bouncycastle Bc-Java

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

In the Bouncy Castle JCE Provider version 1.55 and earlier ECDSA does not fully validate ASN.1 encoding of signature on verification. It is possible to inject extra elements in the sequence making up the signature and still have it validate, which in some cases may allow the introduction of 'invisible' data into a signed structure.

Affected products

• Bouncycastle Bc-Java: up to and including 1.55
• Debian Debian Linux: version 8.0 only

Published 2018-06-04. Last modified 2026-06-17.