PT-2021-11146 · Malwarebytes · Malwarebytes

Published 2021-01-15 · Updated 2021-01-26 · CVE-2020-25533

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Malwarebytes versions prior to 4.0

Description: An issue was discovered in Malwarebytes where a malicious application could perform a privileged action within the Malwarebytes launch daemon. The privileged service improperly validated XPC connections by relying on the PID instead of the audit token. An attacker can construct a situation where the same PID is used for running two different programs at different times, by leveraging a race condition during crafted use of posix spawn.

Recommendations: For versions prior to 4.0, update to version 4.0 or later to resolve the issue. As a temporary workaround, consider restricting access to the Malwarebytes launch daemon to minimize the risk of exploitation.

Exploit

Fix

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

CVE-2020-25533

Affected Products

Malwarebytes

References · 6

• 🔥 https://wojciechregula.blog/post/learn-xpc-exploitation-part-2-say-no-to-the-pid · Exploit
• https://osv.dev/vulnerability/CVE-2020-25533 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-25533 · Security Note
• https://t.me/cvenotify/8623 · Telegram Post
• https://t.me/cibsecurity/22231 · Telegram Post
• https://t.me/cvenotify/8910 · Telegram Post