PT-2021-2238 · Moodle+1 · Moodle+1

Frédéric Massart · Published 2021-01-13 · Updated 2024-03-06 · CVE-2021-20187

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Moodle versions prior to 3.10.1 Moodle versions prior to 3.9.4 Moodle versions prior to 3.8.7 Moodle versions prior to 3.5.16

Description The issue is related to the implementation of Shibboleth authentication technology in Moodle, which is associated with incorrect code generation management. This allows a remote attacker to execute arbitrary code. The problem arises because site administrators can execute arbitrary PHP scripts via a PHP include used during Shibboleth authentication.

Recommendations For versions prior to 3.10.1, update to version 3.10.1 or later. For versions prior to 3.9.4, update to version 3.9.4 or later. For versions prior to 3.8.7, update to version 3.8.7 or later. For versions prior to 3.5.16, update to version 3.5.16 or later.

Fix

Code Injection

Weakness Enumeration

CWE-94

CWE-829

Related Identifiers

ALT-PU-2021-1050

ALT-PU-2021-1098

ALT-PU-2022-1641

BDU:2021-01190

BIT-MOODLE-2021-20187

CVE-2021-20187

GHSA-2JRM-GWW7-WCH2

Affected Products

Alt Linux

Moodle

References · 15

• https://nvd.nist.gov/vuln/detail/CVE-2021-20187 · Security Note
• https://bdu.fstec.ru/vul/2021-01190 · Security Note
• https://moodle.org/mod/forum/discuss.php?d=417171 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-20187 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-moodle-2021-20187 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-20187 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-20187 · Security Note
• https://osv.dev/vulnerability/GHSA-2jrm-gww7-wch2 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-20187 · Vendor Advisory
• https://github.com/moodle/moodle · Note
• https://cybersecurity-help.cz/vdb/SB2021012515 · Note
• https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-68486 · Note
• https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-68486 · Note
• https://t.me/cibsecurity/22802 · Telegram Post
• https://securitylab.ru/vulnerability/515916.php · Note