VulnerabilityModified
CVE-2019-7240
The vulnerable driver exposes a wrmsr instruction via IOCTL 0x9C402088 and does not properly filter the Model Specific Register (MSR).
HIGH 7.2EPSS 2.39%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.39%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered in WinRing0x64.sys in Moo0 System Monitor 1.83. The vulnerable driver exposes a wrmsr instruction via IOCTL 0x9C402088 and does not properly filter the Model Specific Register (MSR). Allowing arbitrary MSR writes can lead to Ring-0 code execution and escalation of privileges.
- CVSS 3.1
- 7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.39% probability · 83th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-665
- Affected
- moo0/system monitor
- Source
- cve@mitre.org
References
- https://github.com/fireeye/Vulnerability-Disclosures/blob/master/FEYE-2019-0004/FEYE-2019-0004.mdExploit, Third Party Advisory
- https://github.com/fireeye/Vulnerability-Disclosures/blob/master/FEYE-2019-0004/FEYE-2019-0004.mdExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.