Klima-Pokorny-Rosa attack on RSA in SSL/TLS in OpenSSL - CVE-2003-0131
Published: August 2, 2016
Vulnerability identifier: #VU257
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2003-0131
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenSSL Software Foundation
Affected software:
OpenSSL
OpenSSL
Detailed vulnerability description
The vulnerability allows a remote attacker to perform an unauthorized RSA private key operation.
The vulnerability exists in OpenSSL. A remote unauthenticated attacker can perform an unauthorized RSA private key operation via a modified Bleichenbacher attack that uses a large number of SSL or TLS connections using PKCS #1 v1.5 padding and cause OpenSSL to leak information regarding the relationship between ciphertext and the associated plaintext, aka the "Klima-Pokorny-Rosa attack."
Successful exploitation of this vulnerability may result in disclosure of system information.
The vulnerability exists in OpenSSL. A remote unauthenticated attacker can perform an unauthorized RSA private key operation via a modified Bleichenbacher attack that uses a large number of SSL or TLS connections using PKCS #1 v1.5 padding and cause OpenSSL to leak information regarding the relationship between ciphertext and the associated plaintext, aka the "Klima-Pokorny-Rosa attack."
Successful exploitation of this vulnerability may result in disclosure of system information.
How to mitigate CVE-2003-0131
Upgrade your version to OpenSSL 0.9.7b, OpenSSL 0.9.6j.