SB2019071906 - Multiple vulnerabilities in Nevma Adaptive Images for WordPress

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Main Vulnerability Database SB2019071906

SB2019071906 - Multiple vulnerabilities in Nevma Adaptive Images for WordPress

Published: July 19, 2019 Updated: September 23, 2019

Security Bulletin ID SB2019071906
CSH Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) PHP file inclusion (CVE-ID: CVE-2019-14205)

CWE-ID: CWE-98 - Improper Control of Filename for Include/Require Statement in PHP Program

CVSSv4: 9.3 [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]


The vulnerability allows a remote attacker to include arbitrary file on the system.

The vulnerability exists due to input validation error when processing directory traversal sequences passed via the "$_REQUEST['adaptive-images-settings']['source_file']" parameter in "adaptive-images-script.php". A remote attacker can set in an arbitrary way the file requested that will be served from the script.

PoC:

http://[host]/wp-content/uploads/2019/05/image.jpg?adaptive-images-settings[source_file]=../../../wp-config.php

http://[host]/wp-content/uploads/2019/05/image.jpg?adaptive-images-settings[source_file]=/etc/passwd





2) Path traversal (CVE-ID: CVE-2019-14206)

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


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

The vulnerability exists due to the plugin contains a cache mechanism that allows the generated resized images to be saved and cached to prevent excessive resources usage. A remote attacker can send a specially crafted file and delete arbitrary files on the system.

The only condition to successfully exploit this vulnerability is that the file that we pass as "$source_file" is newer than the file that we pass as "$cache_file".


Remediation

Install update from vendor's website.

References