#VU79877 Improper authentication in Zimbra Collaboration - CVE-2023-41106

Vulnerability identifier: #VU79877

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-41106

CWE-ID: CWE-287

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 bypass authentication process.

The vulnerability exists due to an unspecified error. A remote non-authenticated attacker can bypass authentication process and gain unauthorized access to a Zimbra account.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Zimbra Collaboration: 8.8.15 Patch 1 - 10.0.2

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External links
https://wiki.zimbra.com/wiki/Security_Center#ZCS_10.0.3_Released
https://wiki.zimbra.com/wiki/Security_Center#ZCS_9.0.0_Patch_35_Released
https://wiki.zimbra.com/wiki/Security_Center#ZCS_8.8.15_Patch_42_Released

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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?

No. We are not aware of malware exploiting this vulnerability.