Vulnerability identifier: #VU27374

Vulnerability risk: Low

CVSSv3.1: 6.6 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5562

CWE-ID: CWE-918

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cybozu Garoon
Web applications / Other software

Vendor: Cybozu

Description

The disclosed vulnerability allows a remote user to perform SSRF attacks.

The vulnerability exists due to insufficient validation of user-supplied input in the V-CUBE Meeting function. A remote administrator can send a specially crafted HTTP request to other web servers and trick the application to initiate requests to arbitrary systems.

Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cybozu Garoon: 4.6.0 - 4.6.3

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External links
http://jvn.jp/en/jp/JVN58849431/index.html
http://kb.cybozu.support/article/36304

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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