Vulnerability identifier: #VU25765

Vulnerability risk: Medium

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Zipper
Web applications / Modules and components for CMS

Vendor: Nils Plaschke

Description

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

The vulnerability exists due to input validation error of filenames when processing directory traversal sequences. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system, leading to to arbitrary file write via Archive Extraction (Zip Slip).

Mitigation
Install update from vendor's website.

Vulnerable software versions

Zipper: 0.5.0 - 1.0.2

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External links
http://snyk.io/vuln/SNYK-PHP-CHUMPERZIPPER-552162
http://github.com/Chumper/Zipper/commit/d15207e010f8fe1bdd341376bd86d599c4166423

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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, proof of concept for this vulnerability is available.