#VU25724 Path traversal in DotNetNuke - CVE-2020-5187

Vulnerability identifier: #VU25724

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-5187

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
DotNetNuke
Web applications / CMS

Vendor: DNN

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in the zip file extraction function. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

DotNetNuke: 9.0.0 - 9.4.4

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External links
https://packetstormsecurity.com/files/156489/DotNetNuke-CMS-9.4.4-Zip-Directory-Traversal.html
https://github.com/dnnsoftware/Dnn.Platform/releases
https://medium.com/@SajjadPourali/dnn-dotnetnuke-cms-not-as-secure-as-you-think-e8516f789175

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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.