CVE-2022-41352
Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 10 November 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 95.48% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 20 October 2022 · due 10 November 2022 · used in ransomware campaigns
- Weakness
- CWE-22
- Affected
- synacor/zimbra collaboration suite
- Source
- cve@mitre.org
EPSS 95.5% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply updates per vendor instructions. https://wiki.zimbra.com/wiki/Security_Center; https://nvd.nist.gov/vuln/detail/CVE-2022-41352
References
- http://packetstormsecurity.com/files/169458/Zimbra-Collaboration-Suite-TAR-Path-Traversal.htmlExploit, Third Party Advisory, VDB Entry
- https://forums.zimbra.org/viewtopic.php?t=71153&p=306532Mitigation, Vendor Advisory
- https://wiki.zimbra.com/wiki/Security_CenterPatch, Release Notes, Vendor Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
- https://www.secpod.com/blog/unpatched-rce-bug-in-zimbra-collaboration-suite-exploited-in-wild/Third Party Advisory
- http://packetstormsecurity.com/files/169458/Zimbra-Collaboration-Suite-TAR-Path-Traversal.htmlExploit, Third Party Advisory, VDB Entry
- https://forums.zimbra.org/viewtopic.php?t=71153&p=306532Mitigation, Vendor Advisory
- https://wiki.zimbra.com/wiki/Security_CenterPatch, Release Notes, Vendor Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
- https://www.secpod.com/blog/unpatched-rce-bug-in-zimbra-collaboration-suite-exploited-in-wild/Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-41352US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.