
Organizations using Citrix NetScaler ADC and NetScaler Gateway are facing a critical security risk. A severe vulnerability, tracked as CVE-2023-4966 and widely known as “CitrixBleed“, has been discovered. This flaw could allow attackers to bypass authentication and hijack existing authenticated sessions.
The situation is urgent because public exploits for this vulnerability are now available. This significantly lowers the bar for malicious actors to attack vulnerable systems. Attackers can potentially use stolen session tokens to gain unauthorized access to sensitive internal resources, bypassing standard login procedures.
Affected organizations are under immediate threat. The only effective way to mitigate this critical vulnerability is to patch the vulnerable NetScaler instances immediately. Ignoring this vulnerability puts sensitive data and systems at severe risk of compromise. Applying the official security updates released by the vendor is the most important action to take right now. Organizations should also review logs for any signs of compromise if patches were not applied promptly. Delaying the patch exposes your organization to active exploitation.
Source: https://www.bleepingcomputer.com/news/security/public-exploits-released-for-citrixbleed-2-netscaler-flaw-patch-now/