← gociux.comall exploited CVEs

Exploited vulnerability · CISA KEV

Is CVE-2018-0155 exploited? Yes: in CISA KEV since 3 Mar 2022

Gociux · Cisco Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2018-0155, Cisco Catalyst Bidirectional Forwarding Detection Denial-of-Service Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Mar 2022, 1436 days after it was published. It affects Cisco Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 3 Mar 2022
ransomwareNot knownno confirmed use
EPSStop 10%more likely than most to be exploited
severity8.6CVSS 3.1 · high
US federal due17 Mar 2022BOD 22-01 deadline

What it is

A vulnerability in the Bidirectional Forwarding Detection (BFD) offload implementation of Cisco Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches could allow an unauthenticated, remote attacker to cause a crash of the iosd process, causing a denial-of-service (DoS) condition.

VendorCisco (103 exploited CVEs in KEV)
ProductCatalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches
VulnerabilityCisco Catalyst Bidirectional Forwarding Detection Denial-of-Service Vulnerability
WeaknessCWE-388
Published28 Mar 2018
Added to KEV3 Mar 2022
Reported by (CNA)cisco

What to do

  1. Check whether you run it. Look for Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches 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 28 Mar 2018.
  4. Get told next time. Email alerts when CISA adds a CVE for Cisco.

References

Questions

Is CVE-2018-0155 being exploited?

Yes. CISA added CVE-2018-0155 to the Known Exploited Vulnerabilities catalog on 3 Mar 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2018-0155 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-2018-0155?

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 Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches 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.

Running Cisco in a regulated environment?

We check exposure across your estate, patch or mitigate with your team, and set up detection for what attackers do after exploiting it.

Get in touch →