CVE-2020-0069
Published: November 3, 2021
Official Description
Multiple MediaTek chipsets contain an insufficient input validation vulnerability and have missing SELinux restrictions in the Command Queue drivers ioctl handlers. This causes an out-of-bounds write leading to privilege escalation. This vulnerability was observed chained with CVE-2019-2215 and CVE-2020-0041 under exploit chain "AbstractEmu."
CISA KEV Advisory
Mediatek Multiple Chipsets Insufficient Input Validation Vulnerability
Multiple MediaTek chipsets contain an insufficient input validation vulnerability and have missing SELinux restrictions in the Command Queue drivers ioctl handlers. This causes an out-of-bounds write leading to privilege escalation. This vulnerability was observed chained with CVE-2019-2215 and CVE-2020-0041 under exploit chain "AbstractEmu."
Apply updates per vendor instructions.
Risk Analysis
This vulnerability in multiple MediaTek chipsets involves insufficient input validation and missing SELinux restrictions, leading to an out-of-bounds write and privilege escalation. Its inclusion in CISA's KEV catalog and active exploitation in the wild, often chained with other vulnerabilities, makes it a significant threat. The low EPSS score suggests that while it is being exploited, the overall likelihood of exploitation for all internet-facing systems is relatively low.
This vulnerability is actively exploited in the wild, as confirmed by its inclusion in CISA's KEV catalog. It has been observed chained with other vulnerabilities in exploit chains.
Apply the latest security updates for affected MediaTek chipsets. Ensure SELinux policies are correctly configured and enforced to prevent privilege escalation.
Technical Analysis
CVE-2020-0069 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2020-0069 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-0069 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1