Cryptographic issues in Bouncy Castle

Published: 2018-06-04 | Updated: 2018-07-05
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2016-1000343
Exploitation vector Network
Public exploit N/A
Vulnerable software
The Bouncy Castle Crypto Package For Java
Universal components / Libraries / Libraries used by multiple products

Vendor Legion of the Bouncy Castle Inc.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Cryptographic issues

EUVDB-ID: #VU13591

Risk: Low


CVE-ID: CVE-2016-1000343


Exploit availability:


The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists in Bouncy Castle JCE Provider implementation of DSA key pair generator that generates a weak private key (1024 bit key size) if used with default values.  The attacker can use this vulnerability to decrypt data.


Install updates from vendor's website.

Vulnerable software versions

The Bouncy Castle Crypto Package For Java: 1.41 - 1.55

Fixed software versions

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?