CVE-2019-3901CWE-667

A race condition in perf_event_open() allows local attackers to leak sensitive data from setuid programs

Medium · published April 22, 2019

CVSS v3.0
5.6
EPSS
0%
Percentile
26.1
In the wild
Unconfirmed
What it is

A race condition in perf_event_open() allows local attackers to leak sensitive data from setuid programs. As no relevant locks (in particular the cred_guard_mutex) are held during the ptrace_may_access() call, it is possible for the specified target task to perform an execve() syscall with setuid execution before perf_event_alloc() actually attaches to it, allowing an attacker to bypass the ptrace_may_access() check and the perf_event_exit_task(current) call that is performed in install_exec_creds() during privileged execve() calls. This issue affects kernel versions before 4.8.

The record
Technical detail
CVSS v3.0
5.6 · MEDIUM
Vector
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00339 · 26.1th percentile
Weakness
CWE-667 · Improper Locking
Published
2019-04-22T15:22Z
EPSS history
Timeline
  • 22 APR 15:22Z
    A race condition in perf_event_open() allows local attackers to leak sensitive data from setuid programs
    cvelistv5