Information disclosure in OpenSSL - CVE-2016-0800
Published: December 21, 2016 / Updated: November 8, 2022
Vulnerability identifier: #VU1914
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:A/U:Green
CVE-ID: CVE-2016-0800
CWE-ID: CWE-327
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: OpenSSL Software Foundation
Affected software:
OpenSSL
OpenSSL
Detailed vulnerability description
The vulnerability allows a remote attacker to decrypt sensitive information.
The vulnerability exists due to usage of weak SSLv2 protocol, which requires to send a ServerVerify message before establishing that a client possesses certain plaintext RSA data. A remote attacker can decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle.
The vulnerability is dubbed "DROWN" attack.
The vulnerability exists due to usage of weak SSLv2 protocol, which requires to send a ServerVerify message before establishing that a client possesses certain plaintext RSA data. A remote attacker can decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle.
The vulnerability is dubbed "DROWN" attack.
How to mitigate CVE-2016-0800
Update to version 1.0.1s or 1.0.2g.