CVE-2022-27924
Published: August 4, 2022
Official Description
Synacor Zimbra Collaboration Suite (ZCS) allows an attacker to inject memcache commands into a targeted instance which causes an overwrite of arbitrary cached entries.
CISA KEV Advisory
Synacor Zimbra Collaboration Suite (ZCS) Command Injection Vulnerability
Synacor Zimbra Collaboration Suite (ZCS) allows an attacker to inject memcache commands into a targeted instance which causes an overwrite of arbitrary cached entries.
Apply updates per vendor instructions.
Risk Analysis
This vulnerability in Synacor Zimbra Collaboration Suite (ZCS) allows an attacker to inject memcache commands, leading to the overwrite of arbitrary cached entries. Its high EPSS score of 0.90420 indicates a very high likelihood of exploitation, making it an urgent concern. The fact that it is in CISA's KEV catalog confirms it has been actively exploited.
This vulnerability is being actively exploited in the wild and is listed in CISA's KEV catalog, indicating confirmed real-world exploitation. It is remotely exploitable.
Apply the latest security updates and patches for Synacor Zimbra Collaboration Suite (ZCS). Implement proper input validation and sanitization for memcache commands to prevent injection attacks.
Technical Analysis
CVE-2022-27924 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2022-27924 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2022-27924 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1