PT-2021-4477 · Unknown · Vpn-User-Portal

Published 2021-09-24 · Updated 2024-03-12 · CVE-2021-41583

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 vpn-user-portal versions prior to 2.3.14

Description The issue arises from insufficient input validation in the vpn-user-portal software, allowing remote authenticated users to obtain OS filesystem access due to the interaction of QR codes with an exec that uses the -r option. This can be leveraged to obtain additional VPN access.

Recommendations For versions prior to 2.3.14, update to version 2.3.14 or later to resolve the issue. As a temporary workaround, consider restricting access to the QR code functionality and the exec command with the -r option until a patch is available.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2021-05110

CVE-2021-41583

Affected Products

Vpn-User-Portal

References · 9

• https://bdu.fstec.ru/vul/2021-05110 · Security Note
• https://osv.dev/vulnerability/CVE-2021-41583 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-41583 · Security Note
• https://github.com/eduvpn/vpn-user-portal/releases · Note
• https://t.me/cvenotify/21945 · Telegram Post
• https://t.me/cvenotify/73595 · Telegram Post
• https://t.me/cibsecurity/29353 · Telegram Post
• https://t.me/cvenotify/21382 · Telegram Post
• https://list.surfnet.nl/pipermail/eduvpn-deploy/2021-September/000352.html · Note