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CitrixBleed 2: Another Critical Citrix NetScaler Flaw Echoing the First CitrixBleed

Organizations relying on Citrix NetScaler appliances are urged to take immediate action following the disclosure of a new, critical security vulnerability. This flaw, tracked as CVE-2024-4967, affects Citrix (now NetScaler) ADC and NetScaler Gateway products and is drawing comparisons to the notorious “CitrixBleed” vulnerability (CVE-2023-4966) due to its potential impact and severity. Security experts are highlighting this as a major concern that requires urgent attention from administrators worldwide.

The newly discovered vulnerability poses a significant risk, potentially allowing attackers to bypass authentication or gain unauthorized access under specific configurations. While the exact technical details of exploitation might differ from the previous CitrixBleed, the outcome – the ability for attackers to compromise systems – makes this flaw equally, if not more, dangerous in practice. This means systems that are not promptly patched could be exposed to serious breaches.

The comparison to the original CitrixBleed is particularly alarming. That vulnerability led to widespread compromises, enabling attackers to steal session tokens and gain persistent access to sensitive corporate networks. This new flaw is being referred to as “CitrixBleed 2” by some because it echoes the critical nature and the potential for significant security incidents if left unaddressed.

Affected versions of NetScaler ADC and NetScaler Gateway are listed in the vendor’s security bulletin, and administrators must consult this information immediately to determine if their appliances are vulnerable. The potential impact includes unauthorized access, data breaches, and system compromise, making this a high-stakes vulnerability.

The most crucial step for any organization using these products is immediate patching. Citrix has released updates that address CVE-2024-4967, and applying these patches is the single most effective way to protect against exploitation. Delaying this action leaves a critical window open for attackers to target susceptible systems. Beyond patching, reviewing logs for any signs of compromise is also a recommended step, especially if patching cannot be performed instantly. This situation underscores the absolute necessity of staying on top of security updates for network infrastructure components. Patching now is not optional; it is essential for safeguarding your network.

Source: https://securityaffairs.com/179339/hacking/citrixbleed-2-the-nightmare-that-echoes-the-citrixbleed-flaw-in-netscaler-devices.html

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