Synacor Zimbra Collaboration Suite (ZCS) Command Injection Vulnerability

Critical Threat Advisory: This vulnerability is documented in active Ransomware campaigns. Immediate remediation required.

Technical Severity

CVSS v3.1 Metrics

HIGH

7.5 / 10

Minimal Risk Critical

Vector Specification

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitation Likelihood

EPSS Prediction

91.21 %

Predictive Probability

Percentile Rank

99.6 th

Documented as more likely to be exploited than 99.6% of known CVEs.

Detection Date

Aug 04, 2022

Remediation Due

Aug 25, 2022

CISA Catalog Active

Threat Analysis

Synacor Zimbra Collaboration Suite (ZCS) allows an attacker to inject memcache commands into a targeted instance which causes an overwrite of arbitrary cached entries.

Remediation Directive

Apply updates per vendor instructions.

Asset Context

Vendor Identity

Synacor

Affected Product

Zimbra Collaboration Suite (ZCS)

Ransomware Status

Campaign Use Known

Weakness Classification

CWE-93

External Intelligence

https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24.1#Security_Fixes

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2022-27924