Vulnerability identifier: #VU66156

Vulnerability risk: Medium

CVSSv3.1: 7.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:H/RL:O/RC:C]

CVE-ID: CVE-2022-27924

CWE-ID: CWE-74

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Zimbra Collaboration
Web applications / Webmail solutions

Vendor: Synacor Inc.

Description

The vulnerability allows a remote attacker to perform cache poisoning.

The vulnerability exists due to improper validation of user-supplied input. A remote non-authenticated attacker can send a specially crafted HTTP request to the affected application and inject arbitrary memcache commands into a targeted instance. As a result, the a remote attacker can overwrite arbitrary cached entries and perform cache poisoning attacks.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Zimbra Collaboration: 8.8.15 - 9.0.0 Patch 24

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External links
http://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24
http://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P31.1

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.