Vulnerability identifier: #VU46714

Vulnerability risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8224

CWE-ID: CWE-94

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
desktop
Other software / Other software solutions

Vendor: Nextcloud

Description

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation when processing OpenSSL configuration file. A remote user can upload a malicious OpenSSL config file into a fixed directory and execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

desktop: 2.6.0 - 2.6.4

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External links
http://hackerone.com/reports/622170
http://nextcloud.com/security/advisory/?id=NC-SA-2020-030
http://security.gentoo.org/glsa/202009-09

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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