#VU5894 Information disclosure in OpenSSL - CVE-2016-7055
Published: February 23, 2017 / Updated: March 30, 2018
Vulnerability identifier: #VU5894
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2016-7055
CWE-ID: CWE-310
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
OpenSSL
OpenSSL
Software vendor:
OpenSSL Software Foundation
OpenSSL Software Foundation
Description
The vulnerability allows a remote attacker to decrypt certain data.
The vulnerability exists in OpenSSL implementation due to propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. A remote attacker can launch attacks against RSA, DSA and DH private keys and decrypt information, passed over encrypted channels. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation.
Successful exploitation of the vulnerability may allow an attacker in certain conditions to launch attacks against OpenSSL clients.
Remediation
Update OpenSSL to version 1.0.2 or 1.1.0c.