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Exploited vulnerability · CISA KEV

Is CVE-2022-39197 exploited? Yes: in CISA KEV since 30 Mar 2023

Gociux · Fortra Cobalt Strike · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2022-39197, Fortra Cobalt Strike Teamserver Cross-Site Scripting (XSS) Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 30 Mar 2023, 189 days after it was published. It affects Fortra Cobalt Strike. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 30 Mar 2023
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity6.1CVSS 3.1 · medium
US federal due20 Apr 2023BOD 22-01 deadline

What it is

Fortra Cobalt Strike contains a cross-site scripting (XSS) vulnerability in Teamserver that would allow an attacker to set a malformed username in the Beacon configuration, allowing them to execute code remotely.

VendorFortra (4 exploited CVEs in KEV)
ProductCobalt Strike
VulnerabilityFortra Cobalt Strike Teamserver Cross-Site Scripting (XSS) Vulnerability
WeaknessCWE-20, CWE-79
Published22 Sep 2022
Added to KEV30 Mar 2023
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for Cobalt Strike in your asset inventory, including appliances and cloud images. Stack check lists every exploited Fortra 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 22 Sep 2022.
  4. Get told next time. Email alerts when CISA adds a CVE for Fortra.

Other exploited CVEs in Cobalt Strike

References

Questions

Is CVE-2022-39197 being exploited?

Yes. CISA added CVE-2022-39197 to the Known Exploited Vulnerabilities catalog on 30 Mar 2023, which means there is reliable evidence of exploitation in the wild.

Is CVE-2022-39197 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-2022-39197?

Apply updates per vendor instructions. Check Fortra's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Cobalt Strike 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 2023 · Fortra scorecard · act-now radar.

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