A vulnerability classified as critical has been found in Netskope Client Service 57/60. Affected is the function doHandshakefromServer of the component Connection Handler. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The Netskope client service, v57 before 57.2.0.219 and v60 before 60.2.0.214, running with NT\SYSTEM privilege, accepts network connections from localhost. The connection handling function in this service suffers from a stack based buffer overflow in "doHandshakefromServer" function. Local users can use this vulnerability to trigger a crash of the service and potentially cause additional impact on the system.

The weakness was released 09/26/2019 (Website). The advisory is available at support.netskope.com. This vulnerability is traded as CVE-2019-10882 since 04/05/2019. Local access is required to approach this attack. A authentication is required for exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 57.2.0.219 or 60.2.0.214 eliminates this vulnerability.

Entry connected to this vulnerability is available at 142327.

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• Netskope

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• Client Service

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• 57
• 60

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