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Exploited vulnerability · CISA KEV

Is CVE-2022-1040 exploited? Yes: in CISA KEV since 31 Mar 2022

Gociux · Sophos Firewall · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2022-1040, Sophos Firewall Authentication Bypass Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 31 Mar 2022, 6 days after it was published. It affects Sophos Firewall, an internet-facing product of the kind attackers use for initial access. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 31 Mar 2022
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity9.8CVSS 3.1 · critical
US federal due21 Apr 2022BOD 22-01 deadline

What it is

An authentication bypass vulnerability in User Portal and Webadmin of Sophos Firewall allows for remote code execution.

VendorSophos (7 exploited CVEs in KEV)
ProductFirewall
VulnerabilitySophos Firewall Authentication Bypass Vulnerability
WeaknessCWE-158
Published25 Mar 2022
Added to KEV31 Mar 2022
Reported by (CNA)Sophos

What to do

  1. Check whether you run it. Look for Firewall in your asset inventory, including appliances and cloud images. Stack check lists every exploited Sophos 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 25 Mar 2022.
  4. Get told next time. Email alerts when CISA adds a CVE for Sophos.

Other exploited CVEs in Firewall

References

Questions

Is CVE-2022-1040 being exploited?

Yes. CISA added CVE-2022-1040 to the Known Exploited Vulnerabilities catalog on 31 Mar 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2022-1040 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-2022-1040?

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

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