PT-2021-3684 · Moodle+1 · Moodle+1

0Xkasper · Published 2021-07-13 · Updated 2025-03-07 · CVE-2021-36395

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Moodle (affected versions not specified)

Description The issue is related to uncontrolled recursion in the system, which can be exploited by a remote attacker to cause a denial of service by creating a specially crafted URL. The file repository's URL parsing required additional recursion handling to mitigate the risk of recursion denial of service.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Resource Exhaustion

Uncontrolled Recursion

Weakness Enumeration

CWE-400

CWE-674

Related Identifiers

ALT-PU-2021-2215

ALT-PU-2022-1641

BDU:2021-03917

BIT-MOODLE-2021-36395

CVE-2021-36395

GHSA-273W-7FXJ-PCP6

Affected Products

Alt Linux

Moodle

References · 15

• https://cve.org/CVERecord?id=CVE-2021-36395 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-36395 · Security Note
• https://bdu.fstec.ru/vul/2021-03917 · Security Note
• https://ubuntu.com/security/CVE-2021-36395 · Vendor Advisory
• https://moodle.org/mod/forum/discuss.php?d=424801 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-moodle-2021-36395 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-36395 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-36395 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-273w-7fxj-pcp6 · Vendor Advisory
• https://github.com/moodle/moodle · Note
• https://t.me/cvenotify/113895 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2021071911 · Note
• https://t.me/cibsecurity/59523 · Telegram Post
• https://redos.red-soft.ru/updatesec · Note
• https://securitylab.ru/vulnerability/522422.php · Note