Drupal PECL YAML parser unsafe object handling

KRITISCH 9.8CVE-2017-6920 · GHSA-9c24-g32g-35rj · Published 06/08/2018 · updated 17/06/2026

Package	Affected versions	Patched versions
drupal/core Packagist	`≥ 8.0, < 8.3.4`	`8.3.4`
drupal/drupal Packagist	`≥ 8.0, < 8.3.4`	`8.3.4`
drupal drupal	`≥ 8.0.0, < 8.3.4`	`8.3.4`

Description

Drupal core 8 before versions 8.3.4 allows remote attackers to execute arbitrary code due to the PECL YAML parser not handling PHP objects safely during certain operations.

NVD description

Drupal core 8 before versions 8.3.4 allows remote attackers to execute arbitrary code due to the PECL YAML parser not handling PHP objects safely during certain operations.

References

nvd.nist.gov/vuln/detail/CVE-2017-6920 · ADVISORY
FriendsOfPHP/security-advisories · WEB
FriendsOfPHP/security-advisories · WEB
drupal/core · PACKAGE
drupal.org/SA-CORE-2017-003 · WEB
drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-06-21/drupal-core-multiple · WEB
securityfocus.com/bid/99211 · WEB
securitytracker.com/id/1038781 · WEB

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Scan my site free