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Exploited vulnerability · CISA KEV

Is CVE-2020-0069 exploited? Yes: in CISA KEV since 3 Nov 2021

Gociux · MediaTek Multiple Chipsets · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2020-0069, Mediatek Multiple Chipsets Insufficient Input Validation Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 603 days after it was published. It affects MediaTek Multiple Chipsets. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 3 Nov 2021
ransomwareNot knownno confirmed use
EPSSbelow top 10%lower predicted activity right now (it is still confirmed exploited)
severity7.8CVSS 3.1 · high
US federal due3 May 2022BOD 22-01 deadline

What it is

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."

VendorMediaTek (1 exploited CVE in KEV)
ProductMultiple Chipsets
VulnerabilityMediatek Multiple Chipsets Insufficient Input Validation Vulnerability
WeaknessCWE-787
Published10 Mar 2020
Added to KEV3 Nov 2021
Reported by (CNA)google_android

What to do

  1. Check whether you run it. Look for Multiple Chipsets in your asset inventory, including appliances and cloud images. Stack check lists every exploited MediaTek CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 10 Mar 2020.
  4. Get told next time. Email alerts when CISA adds a CVE for MediaTek.

References

Questions

Is CVE-2020-0069 being exploited?

Yes. CISA added CVE-2020-0069 to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, which means there is reliable evidence of exploitation in the wild.

Is CVE-2020-0069 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2020-0069?

Apply updates per vendor instructions. Check MediaTek's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Multiple Chipsets and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in November 2021 · act-now radar.

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