Citrix warns admins to kill NetScaler user sessions to block hackers

Citrix reminded administrators today that in order to protect susceptible devices from attacks, they need to take extra precautions after patching their NetScaler appliances against the CVE-2023-4966 ‘Citrix Bleed’ vulnerability.

In addition to installing the required security updates, they should delete all old user sessions and end any open ones. This is an important step because the attackers responsible for the ongoing Citrix Bleed exploitation have been able to access compromised devices even after they have been patched by stealing authentication tokens.

Citrix fixed the vulnerability in early October, but Mandiant disclosed that at least since late read more Citrix warns admins to kill NetScaler user sessions to block hackers.

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