CVE-2026-24068
HighSummary
The VSL privileged helper does not validate clients using NSXPC, allowing any process to connect to this service. The lack of validation in the 'writeReceiptFile' and 'runUninstaller' functions enables an attacker to write files to any location and execute any files with any arguments.
Risk Assessment
The absence of client validation leads to privilege escalation, potentially resulting in serious security breaches within the system. An attacker could gain access to sensitive data and system functions.
Recommendation
It is recommended to implement proper client validation mechanisms in the 'shouldAcceptNewConnection' function and in the 'writeReceiptFile' and 'runUninstaller' functions. Additionally, access to the VSL privileged helper should be monitored and restricted.
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Original NVD description (English source)
The VSL privileged helper does utilize NSXPC for IPC. The implementation of the "shouldAcceptNewConnection" function, which is used by the NSXPC framework to validate if a client should be allowed to connect to the XPC listener, does not validate clients at all. This means that any process can connect to this service using the configured protocol. A malicious process is able to call all the functions defined in the corresponding HelperToolProtocol. No validation is performed in the functions "writeReceiptFile" and “runUninstaller” of the HelperToolProtocol. This allows an attacker to write files to any location with any data as well as execute any file with any arguments. Any process can call these functions because of the missing XPC client validation described before. The abuse of the missing endpoint validation leads to privilege escalation.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS