Vulnerability identifier: #VU49178

Vulnerability risk: Medium

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-35136

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
dolibarr
Web applications / CRM systems

Vendor: Dolibarr ERP & CRM

Description

The vulnerability allows a remote user to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation within the backup functionality. A remote privileged user can pass specially crafted filename via the zipfilename_template parameter to admin/tools/dolibarr_export.php and execute arbitrary OS commands on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

dolibarr: 12.0.0 - 12.0.3

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External links
http://bilishim.com/2020/12/18/zero-hunting-2.html
http://github.com/Dolibarr/dolibarr/commit/4fcd3fe49332baab0e424225ad10b76b47ebcbac
http://github.com/Dolibarr/dolibarr/releases
http://sourceforge.net/projects/dolibarr/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.