Detections
Analytics
TLS Certificate Signed Using Weak Hashing Algorithm - SHA-1
medium Nessus Network Monitor Plugin ID 7200
Synopsis
The SSL certificate has been signed using a weak hash algorithm - SHA-1.Description
The remote service uses an SSL certificate that has been signed using a cryptographically weak hashing algorithm - SHA-1. This algorithm is known to be vulnerable to collision attacks. In theory, a determined attacker may be able to leverage this weakness to generate another certificate with the same digital signature, which could allow them to masquerade as the affected service.Solution
Configure the service to only allow strong encryption, and replace the certificate if necessary.See Also
https://konklone.com/post/why-google-is-hurrying-the-web-to-kill-sha-1
http://googleonlinesecurity.blogspot.com/2014/09/gradually-sunsetting-sha-1.html
https://blog.cloudflare.com/sha-1-deprecation-no-browser-left-behind
Plugin Details
Severity: Medium
ID: 7200
Version: 1.0
Family: Generic
Published: 5/21/2016
Updated: 8/16/2018