CVE-2020-11467 Information

Description

An issue was discovered in Deskpro before 2019.8.0. This product enables administrators to modify the helpdesk interface by editing /portal/api/style/edit-theme-set/template-sources theme templates and uses TWIG as its template engine. While direct access to self and _self variables was not permitted one could abuse the accessible variables in one’s context to reach a native unserialize function via the code parameter. There on could pass a crafted payload to trigger a set of POP gadgets in order to achieve remote code execution.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Reference

https://blog.redforce.io/attacking-helpdesks-part-1-rce-chain-on-deskpro/ https://support.deskpro.com/en/news/posts/deskpro-security-update-2019-09 https://support.deskpro.com/en/news/posts/deskpro-v2019-8-0-released-security-update

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.2