CVE-2020-25533

HIGH

Malwarebytes < 4.0 - Privilege Escalation via XPC PID Validation Race Condition

Title source: llm
STIX 2.1

Description

An issue was discovered in Malwarebytes before 4.0 on macOS. A malicious application was able to 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.

References (1)

Core 1
Core References
Exploit, Patch, Third Party Advisory x_refsource_misc
https://wojciechregula.blog/post/learn-xpc-exploitation-part-2-say-no-to-the-pid/

Scores

CVSS v3 7.0
EPSS 0.0025
EPSS Percentile 16.2%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-362
Status published
Products (1)
malwarebytes/malwarebytes < 4.0
Published Jan 15, 2021
Tracked Since Feb 18, 2026