#VU26548 Improper Authentication in DotNetNuke - CVE-2017-9822

Vulnerability identifier: #VU26548

Vulnerability risk: High

CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2017-9822

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
DotNetNuke
Web applications / CMS

Vendor: DNN

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to application uses cookies in an insecure way. A remote attacker can decode the cookie and use information from the cookie to impersonate other web application users and gain full access to the web application.

Successful exploitation of the vulnerability may allow an attacker to gain administrative access to the application and compromise it.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

DotNetNuke: 5.0 - 9.1.0

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External links
https:2017-08 (Critical) Possible remote code execution on DNN sites

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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?

Yes. This vulnerability is being exploited in the wild.