Home/CVE/Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability
CVE

CVE-2022-41352

Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability

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.

CRITICAL · CVSS 9.8 ⚠ CISA KEV EPSS 0.93958
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 0% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

⬡

Weakness Classification

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
▤

Affected Products & Versions

1
synacor zimbra collaboration suiteall versions
⚠

Public Exploits & PoCs

2
nucleiZimbra Collaboration - Unrestricted File Uploadcritical
pocpacketstormsecurity.com · Zimbra-Collaboration-Suite-TAR-Path-Traversal.htmlpacketstormsecurity.com
◈

Detection Rules (IDS/IPS)

8
et-openET EXPLOIT Possible Zimbra Arbitrary File Upload (CVE-2022-41352) M1attempted-admin
et-openET EXPLOIT Possible Zimbra Arbitrary File Upload (CVE-2022-41352) M2attempted-admin
et-openET EXPLOIT Possible Zimbra Arbitrary File Upload (CVE-2022-41352) M4attempted-admin
et-openET EXPLOIT Possible Zimbra Arbitrary File Upload (CVE-2022-41352) M3attempted-admin
et-openET EXPLOIT Possible Zimbra Arbitrary File Upload (CVE-2022-41352) M6attempted-admin
et-openET EXPLOIT Possible Zimbra Arbitrary File Upload (CVE-2022-41352) M5attempted-admin
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD26 Sep 2022 · 02:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
yes
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
cisaKEV-CVE-2022-41352
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://forums.zimbra.org/viewtopic.php?t=71153&p=306532MitigationVendor 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
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