#VU30829 Input validation error in Backdrop CMS - CVE-2019-14771

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Main Vulnerability Database Vulnerabilities #VU30829

#VU30829 Input validation error in Backdrop CMS - CVE-2019-14771

Published: August 8, 2019 / Updated: July 17, 2020


Vulnerability identifier: #VU30829
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2019-14771
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Backdrop CMS
Software vendor:
Backdrop CMS

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Backdrop CMS 1.12.x before 1.12.8 and 1.13.x before 1.13.3 allows the upload of entire-site configuration archives through the user interface or command line. It does not sufficiently check uploaded archives for invalid data, potentially allowing non-configuration scripts to be uploaded to the server. (This attack is mitigated by the attacker needing the "Synchronize, import, and export configuration" permission, a permission that only trusted administrators should be given. Other preventative measures in Backdrop CMS prevent the execution of PHP scripts, so another server-side scripting language must be accessible on the server to execute code.)


Remediation

Install update from vendor's website.

External links