Vulnerability identifier: #VU15464

Vulnerability risk: High

CVSSv3.1: 9.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2018-17553

CWE-ID: CWE-434

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Navigate CMS
Web applications / CMS

Vendor: Naviwebs

Description

The vulnerability allows a remote attacker to conduct directory traversal attack on the target system.

The vulnerability exists in the navigate_upload.php code due to insufficient validation of user-supplied input. A remote attacker can send a POST request with engine=picnik and id=../../../navigate_info.php. that submits malicious directory traversal characters, upload PHP files to arbitrary locations on the system, bypass authentication and execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Update to version 2.8.5 r1355.

Vulnerable software versions

Navigate CMS: 2.8

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External links
http://github.com/rapid7/metasploit-framework/pull/10704
http://github.com/NavigateCMS/Navigate-CMS/commit/2bdcb8b3c5bb23851a2115db96585f1ac8cb2d1e

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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. However, a fully functional exploit for this vulnerability is available.