Arbitrary PHP code execution in Drupal - CVE-2017-6920
Published: June 23, 2017
Vulnerability identifier: #VU7180
CSH Severity: High
CVSS v4: 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]
CVE-ID: CVE-2017-6920
CWE-ID: CWE-19
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute PHP code on the target system.
The weakness exists due to improper handling of PHP objects by PECL YAML parser during certain operations within Drupal core. A remote attacker can send a specially crafted file and execute PHP code on the vulnerable system.
The weakness exists due to improper handling of PHP objects by PECL YAML parser during certain operations within Drupal core. A remote attacker can send a specially crafted file and execute PHP code on the vulnerable system.
Affected software
Drupal
How to mitigate CVE-2017-6920
Update to version 8.3.4.