Actively exploited in the wild
Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability
Synacor - Zimbra Collaboration Suite (ZCS) · Listed in the CISA KEV since 2022-08-11. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2022-37042
CriticalCVSS 9.8KEVExploitation Probability (EPSS)
Very high risk100th percentile - higher than 100% of all known CVEs
Summary
Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0 has mboximport functionality that receives a ZIP archive and extracts files from it. By bypassing authentication (i.e., not having an authtoken), an attacker can upload arbitrary files to the system, leading to directory traversal and remote code execution. NOTE: this issue exists because of an incomplete fix for CVE-2022-27925.
Risk Assessment
An unauthenticated attacker can achieve remote code execution, potentially leading to full compromise of the mail server and user data.
Recommendation
Apply the latest Zimbra patches that fully address CVE-2022-27925 and CVE-2022-37042.
Other vulnerabilities in Zimbra Collaboration Suite
See all- CVE-2022-27925HighActively exploited
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.
- CVE-2022-24682MediumActively exploited
The Calendar feature in Zimbra Collaboration Suite 8.8.x before 8.8.15 patch 30 allows an attacker to place HTML containing executable JavaScript inside element attributes. This markup becomes unescaped, causing arbitrary markup to be injected into the document.
- CVE-2019-9621HighActively exploited
An SSRF vulnerability in the ProxyServlet component of Zimbra Collaboration Suite. It allows an attacker to send requests from the server to internal resources.
- CVE-2018-6882MediumActively exploited
A cross-site scripting (XSS) vulnerability in ZmMailMsgView.getAttachmentLinkHtml in Zimbra Collaboration Suite (ZCS) before 8.7 Patch 1 and 8.8.x before 8.8.7. Remote attackers can inject arbitrary web script or HTML via a Content-Location header in an email attachment.
Original NVD description (English source)
Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0 has mboximport functionality that receives a ZIP archive and extracts files from it. By bypassing authentication (i.e., not having an authtoken), an attacker can upload arbitrary files to the system, leading to directory traversal and remote code execution. NOTE: this issue exists because of an incomplete fix for CVE-2022-27925.