Security – geekmungus

Putty.exe – “Couldn’t agree a key exchange algorithm”

06/07/202106/07/2021Tristan Self

I had this issue today, on a host that had recently had a software upgrade. Problem: A host to which I was connecting with SSH gave this error: “Couldn’t agree a key exchange algorithm (available: Curve25519-sha256@libssh.org, ECDH-sha2-nistp521, ECDH-sha2-nistp384, ECDH-sha2-nistp256)”. Solution: In my case I updated to a later release of Putty.exe and the issue was resolved. […]

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Leaky Print Spooler Vulnerability (CVE-2021-1675)

01/07/202104/07/2021Tristan Self

So it appears that there is a vulnerability identified in Microsoft Windows machines running Active Directory, this is covered on the Register: https://www.theregister.com/2021/06/30/windows_print_spool_vuln_rce/ Until you patch this you can just disable the “Printer Spooler” service on your Domain Controllers and well to be honest you don’t need this running on the Domain Controller anyway. Edit: […]

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