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Exploited vulnerability · CISA KEV

Is CVE-2018-7445 exploited? Yes: in CISA KEV since 8 Sep 2022

Gociux · MikroTik RouterOS · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2018-7445, MikroTik RouterOS Stack-Based Buffer Overflow Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 8 Sep 2022, 1634 days after it was published. It affects MikroTik RouterOS. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 8 Sep 2022
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity9.8CVSS 3.1 · critical
US federal due29 Sep 2022BOD 22-01 deadline

What it is

In MikroTik RouterOS, a stack-based buffer overflow occurs when processing NetBIOS session request messages. Remote attackers with access to the service can exploit this vulnerability and gain code execution on the system.

VendorMikroTik (5 exploited CVEs in KEV)
ProductRouterOS
VulnerabilityMikroTik RouterOS Stack-Based Buffer Overflow Vulnerability
WeaknessCWE-119
Published19 Mar 2018
Added to KEV8 Sep 2022
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for RouterOS in your asset inventory, including appliances and cloud images. Stack check lists every exploited MikroTik 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 19 Mar 2018.
  4. Get told next time. Email alerts when CISA adds a CVE for MikroTik.

Other exploited CVEs in RouterOS

References

Questions

Is CVE-2018-7445 being exploited?

Yes. CISA added CVE-2018-7445 to the Known Exploited Vulnerabilities catalog on 8 Sep 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2018-7445 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-2018-7445?

Apply updates per vendor instructions. Check MikroTik's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected RouterOS 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 September 2022 · MikroTik scorecard · act-now radar.

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