Allele Security Alert
ASA-2018-00007, CVE-2018-10709, CORE-2018-0005
Drivers allow non-privileged user arbitrary access to CRs (Control Registers)
The vulnerability described in this alert affects the drivers AsrDrv101.sys and AsrDrv102.sys. They are installed by the following ASRock utilities:
ASRock RGBLED before v22.214.171.124
A-Tuning before v3.0.210
F-Stream before v3.0.210
RestartToUEFI before v126.96.36.199
ASRock RGBLED v1.0.36
Proof of concept
The drivers affected expose to a non-privileged user access to control registers of the CPU through ioctl() system call. The ioctl arguments are 0x22286C and 0x222870.
The control registers are registers in CPU that control its general behaviour and exposing access to them allows an attacker to totally control the CPU. This can be abused in several ways by attackers to achieve privilege escalation, information leakage, denial of service and not limited to bypassing of mitigations and protections imposed by operating system.
Diego Juarez (SecureAuth) and Leandro Cuozzo (SecureAuth)
ASRock Drivers Elevation of Privilege Vulnerabilities
[FD] [CORE-2018-0005] – ASRock Drivers Elevation of Privilege Vulnerabilities
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Last modified: February 3, 2019