Actively exploited · Published Apr 20, 2022 · Assigned by mitre

CVE-2022-27924

Critical 9.8 Exploited Ransomware

In plain English

A critical-severity injection in Zimbra Collaboration Suite (ZCS) from Synacor. Attackers are actively exploiting it in the wild (listed by CISA on August 4, 2022). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 93.9% (higher than 99.8% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei. Apply updates per vendor instructions.

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)93.9%top 0.2% of all CVEs

Exploited in the wildYesCISA KEV since Aug 4, 2022

Attack tooling1Nuclei

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by Aug 25, 2022.

Official description

Zimbra Collaboration (aka ZCS) 8.8.15 and 9.0 allows an unauthenticated attacker to inject arbitrary memcache commands into a targeted instance. These memcache commands becomes unescaped, causing an overwrite of arbitrary cached entries.

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

Weakness: CWE-74 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories x_refsource_MISC
https://wiki.zimbra.com/wiki/Security_Center x_refsource_MISC
https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24 x_refsource_MISC
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-27924 government-resource