Description
Drupal Core is prone to a security bypass vulnerability. Exploiting this issue may allow attackers to sneak in new line character in headers and pass untrusted values, which would be then improperly parsed. Drupal Core versions 9.2.x ranging from 9.2.0 and up to and including 9.2.15 are vulnerable.
Remediation
Update to Drupal Core version 9.2.16 or latest
References
Related Vulnerabilities
Envoy Wrong DOWNSTREAM_REMOTE_ADDRESS logged Issue (CVE-2020-35470)
PostgreSQL Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2015-3167)
PHP NULL Pointer Dereference Vulnerability (CVE-2016-6292)
Elgg Permissions, Privileges, and Access Controls Vulnerability (CVE-2012-6562)
phpMyFAQ Cross-Site Request Forgery (CSRF) Vulnerability (CVE-2017-15729)