Multiple vulnerabilities in DNN (DotNetNuke)



Published: 2020-03-02 | Updated: 2021-10-20
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2020-5186
CVE-2020-5188
CWE-ID CWE-79
CWE-434
Exploitation vector Network
Public exploit N/A
Vulnerable software
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DotNetNuke
Web applications / CMS

Vendor DNN

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Cross-site scripting

EUVDB-ID: #VU25722

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5186

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to open a specially crafted XML file and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

DotNetNuke: 9.0.0 - 9.4.4

External links

http://github.com/dnnsoftware/Dnn.Platform/releases
http://medium.com/@SajjadPourali/dnn-dotnetnuke-cms-not-as-secure-as-you-think-e8516f789175
http://packetstormsecurity.com/files/156483/DotNetNuke-CMS-9.5.0-Cross-Site-Scripting.html


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.

2) Arbitrary file upload

EUVDB-ID: #VU25723

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5188

CWE-ID: CWE-434 - Unrestricted Upload of File with Dangerous Type

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insecure permissions issue. A remote authenticated attacker can bypass the client-side validation and upload files with extensions which are allowed only for superuser only.

Mitigation

Install update from vendor's website.

Vulnerable software versions

DotNetNuke: 9.0.0 - 9.4.4

External links

http://packetstormsecurity.com/files/156484/DotNetNuke-CMS-9.5.0-File-Extension-Check-Bypass.html
http://github.com/dnnsoftware/Dnn.Platform/releases
http://medium.com/@SajjadPourali/dnn-dotnetnuke-cms-not-as-secure-as-you-think-e8516f789175


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.



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