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Exploited vulnerability · CISA KEV

Is CVE-2019-7483 exploited? Yes: in CISA KEV since 28 Mar 2022

Gociux · SonicWall SMA100 · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2019-7483, SonicWall SMA100 Directory Traversal Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 28 Mar 2022, 830 days after it was published. It affects SonicWall SMA100, 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 · 28 Mar 2022
ransomwareNot knownno confirmed use
EPSStop 10%more likely than most to be exploited
severity7.5CVSS 3.1 · high
US federal due18 Apr 2022BOD 22-01 deadline

What it is

In SonicWall SMA100, an unauthenticated Directory Traversal vulnerability in the handleWAFRedirect CGI allows the user to test for the presence of a file on the server.

VendorSonicWall (20 exploited CVEs in KEV)
ProductSMA100
VulnerabilitySonicWall SMA100 Directory Traversal Vulnerability
WeaknessCWE-22
Published19 Dec 2019
Added to KEV28 Mar 2022
Reported by (CNA)sonicwall

What to do

  1. Check whether you run it. Look for SMA100 in your asset inventory, including appliances and cloud images. Stack check lists every exploited SonicWall 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 Dec 2019.
  4. Get told next time. Email alerts when CISA adds a CVE for SonicWall.

Other exploited CVEs in SMA100

References

Questions

Is CVE-2019-7483 being exploited?

Yes. CISA added CVE-2019-7483 to the Known Exploited Vulnerabilities catalog on 28 Mar 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2019-7483 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-2019-7483?

Apply updates per vendor instructions. Check SonicWall's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected SMA100 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 · SonicWall scorecard · act-now radar.

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