GitHub replaces RSA SSH host key after brief exposure in public repository to prevent any bad actor from impersonating the service or eavesdropping on users’ operations over SSH.
The activity, which was carried out at 05:00 UTC on March 24, 2023, is said to have been undertaken as a measure to prevent any bad actor from impersonating the service or eavesdropping on users’ operations over SSH.
“This key does not grant access to GitHub’s infrastructure or customer data,” Mike Hanley, chief security officer and SVP of engineering at GitHub, said in a post.
“This change only impacts Git operations over SSH using RSA.”
The move does not impact Web traffic to GitHub.com and Git operations performed via HTTPS. No change is required for ECDSA or Ed25519 users.
The Microsoft-owned company said there is no evidence that the exposed SSH private key was exploited by adversaries.
It further emphasized that the “issue was not the result of a compromise of any GitHub systems or customer information.” It blamed it on an “inadvertent publishing of private information.”
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