“This vulnerability is now under mass exploitation.” Citrix Bleed bug bites hard
Enlarge (credit: Getty Images) A vulnerability that allows attackers to bypass multifactor authentication and access enterprise networks using hardware sold by Citrix is under mass exploitation by ransomware hackers despite a patch being available for three weeks. Citrix Bleed, the common name for the vulnerability, carries a severity rating of 9.4 out of a possible 10, a relatively high designation for a mere information-disclosure bug. The reason: the information disclosed can include session tokens, which the hardware assigns to devices that have already successfully provided credentials, including those providing MFA. The vulnerability, tracked as CVE-2023-4966 and residing in Citrix’s NetScaler [...]