There is an elevation of privilege vulnerability in server and client components of Absolute Secure Access prior to version 13.07. Attackers with local access and valid desktop user credentials can elevate their privilege to system level by passing invalid address data to the vulnerable component. This could be used to manipulate process tokens to elevate the privilege of a normal process to System. The scope is changed, the impact to system confidentiality and integrity is high, the impact to the availability of the effected component is none.
The product obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer.
An attacker can supply a pointer for memory locations that the product is not expecting. If the pointer is dereferenced for a write operation, the attack might allow modification of critical state variables, cause a crash, or execute code. If the dereferencing operation is for a read, then the attack might allow reading of sensitive data, cause a crash, or set a variable to an unexpected value (since the value will be read from an unexpected memory location). There are several variants of this weakness, including but not necessarily limited to: