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Exploited vulnerability · CISA KEV

Is CVE-2022-30333 exploited? Yes: in CISA KEV since 9 Aug 2022

Gociux · RARLAB UnRAR · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2022-30333, RARLAB UnRAR Directory Traversal Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 9 Aug 2022, 92 days after it was published. It is known to be used in ransomware campaigns. It affects RARLAB UnRAR. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 9 Aug 2022
ransomwareKnownused in campaigns
EPSStop 1%among the most likely CVEs to be exploited
severity9.8CVSS 3.1 · critical
US federal due30 Aug 2022BOD 22-01 deadline

What it is

RARLAB UnRAR on Linux and UNIX contains a directory traversal vulnerability, allowing an attacker to write to files during an extract (unpack) operation.

VendorRARLAB (5 exploited CVEs in KEV)
ProductUnRAR
VulnerabilityRARLAB UnRAR Directory Traversal Vulnerability
WeaknessCWE-22, CWE-59
Published9 May 2022
Added to KEV9 Aug 2022
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for UnRAR in your asset inventory, including appliances and cloud images. Stack check lists every exploited RARLAB 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 9 May 2022.
  4. Get told next time. Email alerts when CISA adds a CVE for RARLAB.

References

Questions

Is CVE-2022-30333 being exploited?

Yes. CISA added CVE-2022-30333 to the Known Exploited Vulnerabilities catalog on 9 Aug 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2022-30333 used in ransomware attacks?

Yes, CISA lists it as known to be used in ransomware campaigns.

How do I fix CVE-2022-30333?

Apply updates per vendor instructions. Check RARLAB's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected UnRAR 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 August 2022 · RARLAB scorecard · act-now radar.

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