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Exploited vulnerability · CISA KEV

Is CVE-2022-37042 exploited? Yes: in CISA KEV since 11 Aug 2022

Gociux · Synacor Zimbra Collaboration Suite (ZCS) · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2022-37042, Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 11 Aug 2022, the day it was published. It is known to be used in ransomware campaigns. It affects Synacor Zimbra Collaboration Suite (ZCS). If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 11 Aug 2022
ransomwareKnownused in campaigns
EPSStop 1%among the most likely CVEs to be exploited
severity9.8CVSS 3.1 · critical
US federal due1 Sep 2022BOD 22-01 deadline

What it is

Synacor Zimbra Collaboration Suite (ZCS) contains an authentication bypass vulnerability in MailboxImportServlet. This vulnerability was chained with CVE-2022-27925 which allows for unauthenticated remote code execution.

VendorSynacor (19 exploited CVEs in KEV)
ProductZimbra Collaboration Suite (ZCS)
VulnerabilitySynacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability
WeaknessCWE-23
Published11 Aug 2022
Added to KEV11 Aug 2022
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for Zimbra Collaboration Suite (ZCS) in your asset inventory, including appliances and cloud images. Stack check lists every exploited Synacor 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 11 Aug 2022.
  4. Get told next time. Email alerts when CISA adds a CVE for Synacor.

Other exploited CVEs in Zimbra Collaboration Suite (ZCS)

References

Questions

Is CVE-2022-37042 being exploited?

Yes. CISA added CVE-2022-37042 to the Known Exploited Vulnerabilities catalog on 11 Aug 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2022-37042 used in ransomware attacks?

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

How do I fix CVE-2022-37042?

Apply updates per vendor instructions. Check Synacor's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Zimbra Collaboration Suite (ZCS) 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 · Synacor scorecard · act-now radar.

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