CVE-2019-3901

 

Published at: - 22-04-2019 06:29

Last modified: - 26-10-2022 01:44

Total changes: - 3

Description

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

 

Verification logic

 

Reference

• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3901
• 89937-Third Party Advisory, VDB Entry
• https://security.netapp.com/advisory/ntap-20190517-0005/
• [debian-lts-announce] 20190528 [SECURITY] [DLA 1799-1] linux security update-Mailing List, Third Party Advisory
• [debian-lts-announce] 20190528 [SECURITY] [DLA 1799-2] linux security update-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2019-3901

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures