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OpenSSL 'Diffie-Hellman small subgroups' MitM Attack Vulnerability (Windows)

Information

Severity

Severity

Low

Family

Family

General

CVSSv2 Base

CVSSv2 Base

2.6

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:H/Au:N/C:P/I:N/A:N

Solution Type

Solution Type

Vendor Patch

Created

Created

8 years ago

Modified

Modified

5 years ago

Summary

This host is running OpenSSL and is prone to man-in-the-middle (MitM) attack vulnerability.

Insight

Insight

The flaw exists as the primes used in X9.42 style parameter files may not be safe. When an application is using Diffie-Hellman configured with parameters based on primes that are not safe then an attacker could use this fact to find a peer's private DH exponent.

Affected Software

Affected Software

OpenSSL versions 1.0.2x before 1.0.2f on Windows.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

Upgrade to OpenSSL 1.0.2f or later.

Common Vulnerabilities and Exposures (CVE)