#VU13590 Improper verification of cryptographic signature in The Bouncy Castle Crypto Package For Java - CVE-2016-1000342
Published: July 5, 2018
Vulnerability identifier: #VU13590
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2016-1000342
CWE-ID: CWE-347
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerable software:
The Bouncy Castle Crypto Package For Java
The Bouncy Castle Crypto Package For Java
Software vendor:
Legion of the Bouncy Castle Inc.
Legion of the Bouncy Castle Inc.
Description
The vulnerability allows a remote attacker to bypass signature validation process.
The JCE Provider in Bouncy Castle does not fully validate ASN.1 encoding of signature on verification within ECDSA implementation. A remote attacker can inject extra elements in the sequence making up the signature, which will be considered valid allowing an attacker to add extra data into a signed structure.
Remediation
Install updates from vendor's website.