#VU4216 Arbitrary file upload in MoinMoin - CVE-2012-6081

Vulnerability identifier: #VU4216

Vulnerability risk: Critical

CVSSv4.0: 9.4 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/U:Red]

CVE-ID: CVE-2012-6081

CWE-ID: CWE-434

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
MoinMoin
Web applications / CMS

Vendor: MoinMoin

Description
The vulnerability allows a remote authenticated attacker to compromise system.

The weakness exists due to insufficient validation of the filename extension when uploading files twikidraw (action/twikidraw.py) and anywikidraw (action/anywikidraw.py) actions. A remote authenticated attacker with write permissions can upload and execute arbitrary file with executable extension.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Note: the vulnerability was being actively exploited.

Mitigation
Update to version 1.9.6 or later.

Vulnerable software versions

MoinMoin: 1.9 - 1.9.5

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External links
https://moinmo.in/MoinMoinRelease1.9
https://moinmo.in/SecurityFixes
https://www.exploit-db.com/exploits/25304/

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