QID 38902

Date Published: 2023-07-19

QID 38902: OpenSSH Man-in-the-Middle (MITM) Attack Vulnerability

OpenSSH (OpenBSD Secure Shell) is a set of computer programs providing encrypted communication sessions over a computer network using the SSH protocol.

OpenSSH contains the following vulnerabilities:
CVE-2020-14145:The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client). NOTE: some reports state that 8.5 and 8.6 are also affected.

Affected Versions:
OpenSSH 5.7-8.6

QID Detection Logic:
This unauthenticated detection works by reviewing the version of the OpenSSH service.

Successful exploitation allows man-in-the-middle attackers to target initial connection attempts

CVSS V3 rated as Medium - 5.9 severity.

CVSS V2 rated as Medium - 4.3 severity.

Solution

Customers are advised to upgrade to OpenSSH 8.7 or later to remediate these vulnerabilities.

Vendor References

CVE-2020-14145 - www.openssh.com/txt/release-8.7

CVEs related to QID 38902

CVE-2020-14145 |

Software Advisories

Advisory ID	Software	Component	Link
CVE-2020-14145			www.openssh.com/

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