PT-2021-24112 · Riseup · Bitmask Riseup Vpn

Nick Manfredi · Published 2021-12-30 · Updated 2022-07-12 · CVE-2021-44466

Positive Technologies (AI Summary)

CVSS v3.1

7.3

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Bitmask Riseup VPN version 0.21.6

Description: The issue is related to improper access controls in the software. When installed in a non-default directory off the system root, the installer fails to properly set Access Control Lists (ACLs). This allows lower privileged users to replace the VPN executable with a malicious one. If a higher privileged user, such as an Administrator, launches the malicious executable, it is possible for the lower privileged user to escalate to Administrator privileges.

Recommendations: For Bitmask Riseup VPN version 0.21.6, consider restricting access to the VPN executable until a patch is available. As a temporary workaround, ensure that the installation directory has proper ACLs set to prevent lower privileged users from replacing the executable. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Incorrect Permission

Weakness Enumeration

CWE-732

Related Identifiers

CVE-2021-44466

Affected Products

Bitmask Riseup Vpn

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2021-44466 · Security Note
• https://osv.dev/vulnerability/CVE-2021-44466 · Vendor Advisory
• https://tenable.com/security/research/tra-2021-58 · Patch
• https://t.me/cvenotify/25242 · Telegram Post