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[ CVE-2022-27925 · Published 21 Apr 2022 ]

Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability

Exploited · CISA KEV CVSS 7.2 EPSS 99%No fix listed yet

[ Why it matters ]Priority signals

  • Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-08-11
  • Known to be used in ransomware campaigns
  • EPSS: 99% chance of exploitation in the next 30 days (higher than 100% of CVEs)

[ Description ]Official description

Zimbra Collaboration (aka ZCS) 8.8.15 and 9.0 has mboximport functionality that receives a ZIP archive and extracts files from it. An authenticated user with administrator rights has the ability to upload arbitrary files to the system, leading to directory traversal.

CISA: Synacor Zimbra Collaboration Suite (ZCS) contains flaw in the mboximport functionality, allowing an authenticated attacker to upload arbitrary files to perform remote code execution. This vulnerability was chained with CVE-2022-37042 which allows for unauthenticated remote code execution.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 1 Sep 2022): Apply updates per vendor instructions.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References