SB2020031711 - Multiple vulnerabilities in Moodle
Published: March 17, 2020 Updated: March 17, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Input validation error (CVE-ID: CVE-2020-1756)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to execute arbitrary code on the system.
The vulnerability exists due to insufficient validation of user-supplied input in "admin/tool/phpunit/webrunner.php" file. A remote administrator can pass specially crafted input to the application and execute arbitrary code on the target system.
2) Spoofing attack (CVE-ID: CVE-2020-1755)
CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to incorrect processing of user-supplied data. A remote attacker can use X-Forwarded-For headers to spoof a user's IP and bypass remote address checks.
3) Information disclosure (CVE-ID: CVE-2020-1754)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to the grade history report does not respect Separate groups mode in the course settings. A remote authenticated attacker viewing the grade history report without the "access all groups" capability can view sensitive information from other groups.
Remediation
Install update from vendor's website.