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Exploited vulnerability · CISA KEV

Is CVE-2018-0147 exploited? Yes: in CISA KEV since 25 Mar 2022

Gociux · Cisco Secure Access Control System (ACS) · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2018-0147, Cisco Secure Access Control System Java Deserialization Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 25 Mar 2022, 1478 days after it was published. It affects Cisco Secure Access Control System (ACS). If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 25 Mar 2022
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity9.8CVSS 3.1 · critical
US federal due15 Apr 2022BOD 22-01 deadline

What it is

A vulnerability in Java deserialization used by Cisco Secure Access Control System (ACS) could allow an unauthenticated, remote attacker to execute arbitrary commands on an affected device. The vulnerability is due to insecure deserialization of user-supplied content by the affected software.

VendorCisco (103 exploited CVEs in KEV)
ProductSecure Access Control System (ACS)
VulnerabilityCisco Secure Access Control System Java Deserialization Vulnerability
WeaknessCWE-20
Published8 Mar 2018
Added to KEV25 Mar 2022
Reported by (CNA)cisco

What to do

  1. Check whether you run it. Look for Secure Access Control System (ACS) in your asset inventory, including appliances and cloud images. Stack check lists every exploited Cisco 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 8 Mar 2018.
  4. Get told next time. Email alerts when CISA adds a CVE for Cisco.

References

Questions

Is CVE-2018-0147 being exploited?

Yes. CISA added CVE-2018-0147 to the Known Exploited Vulnerabilities catalog on 25 Mar 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2018-0147 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-2018-0147?

Apply updates per vendor instructions. Check Cisco's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Secure Access Control System (ACS) 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 March 2022 · Cisco scorecard · act-now radar.

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