Zimbra (ZCS) 8.8.15/9.0 File Upload via amavis Cpio Loophole
CVE-2022-41352 Published on September 26, 2022
An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0. An attacker can upload arbitrary files through amavis via a cpio loophole (extraction to /opt/zimbra/jetty/webapps/zimbra/public) that can lead to incorrect access to any other user accounts. Zimbra recommends pax over cpio. Also, pax is in the prerequisites of Zimbra on Ubuntu; however, pax is no longer part of a default Red Hat installation after RHEL 6 (or CentOS 6). Once pax is installed, amavis automatically prefers it over cpio.
Known Exploited Vulnerability
This Zimbra Collaboration (ZCS) Arbitrary File Upload Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Zimbra Collaboration (ZCS) allows an attacker to upload arbitrary files using cpio package to gain incorrect access to any other user accounts.
The following remediation steps are recommended / required by November 10, 2022: Apply updates per vendor instructions.
Vulnerability Analysis
CVE-2022-41352 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors in an automatable fashion. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is a Directory traversal Vulnerability?
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
CVE-2022-41352 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2022-41352
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Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.