SB2022032104 - Moodle update for PHPMailer
Published: March 21, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Input validation error (CVE-ID: CVE-2021-34551)
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input within the setLanguage() method when processing the $lang_path parameter on a Windows system. A remote attacker can pass specially crafted input to the application, set a UNC path via the affected parameter and execute arbitrary PHP code on the system.
2) Code Injection (CVE-ID: CVE-2021-3603)
The vulnerability allows a remote attacker to execute arbitrary PHP code on the target system.
The vulnerability exists due to improper input validation. If the $patternselect parameter to validateAddress() is set to 'php' (the default, defined by PHPMailer::$validator), and the global namespace contains a function called php, it will be called in preference to the built-in validator of the same name. A remote attacker can send a specially crafted request and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
3) Deserialization of Untrusted Data (CVE-ID: CVE-2020-36326)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data in "addAttachment". A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.