Insecure DLL loading in ownCloud Desktop Client

1) Insecure DLL loading

EUVDB-ID: #VU50956

Risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-28646

CWE-ID: CWE-427 - Uncontrolled Search Path Element

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to the application loads DLL libraries in an insecure manner. A remote attacker can place a specially crafted .dll file on a remote SMB fileshare, trick the victim into opening a file, associated with the vulnerable application, and execute arbitrary code on victim's system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ownCloud Desktop App: 1.8.3 - 2.6.3

CPE2.3

• cpe:2.3:a:owncloud:owncloud_desktop_app:1.8.3:*:*:*:*:*:*:*
• cpe:2.3:a:owncloud:owncloud_desktop_app:1.8.3:rc3:*:*:*:*:*:*
• cpe:2.3:a:owncloud:owncloud_desktop_app:1.8.4:*:*:*:*:*:*:*

External links

https://owncloud.com/security-advisories/cve-2020-28646/

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.