CVE-2019-12991 vulnerability in Citrix Products
Published on July 16, 2019
Citrix SD-WAN 10.2.x before 10.2.3 and NetScaler SD-WAN 10.0.x before 10.0.8 have Improper Input Validation (issue 5 of 6).
Known Exploited Vulnerability
This Citrix SD-WAN and NetScaler Command Injection Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Authenticated Command Injection in Citrix SD-WAN Appliance and NetScaler SD-WAN Appliance.
The following remediation steps are recommended / required by April 15, 2022: Apply updates per vendor instructions.
Vulnerability Analysis
CVE-2019-12991 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Shell injection Vulnerability?
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
CVE-2019-12991 has been classified to as a Shell injection vulnerability or weakness.
Products Associated with CVE-2019-12991
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Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.