CVE-2019-3901 Detail

Current 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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  4.7 MEDIUM
Vector:  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Nist CVSS score does not match with CNA score
CNA:  Red Hat, Inc.
Base Score:  5.6 MEDIUM
Vector:  CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: It is possible that the NVD CVSS may not match that of the CNA. The most common reason for this is that publicly available information does not provide sufficient detail or that information simply was not available at the time the CVSS vector string was assigned.

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Hyperlink Resource
http://www.securityfocus.com/bid/89937 Third Party Advisory  VDB Entry 
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3901 Issue Tracking  Patch  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2019/05/msg00041.html Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2019/05/msg00042.html Mailing List  Third Party Advisory 
https://security.netapp.com/advisory/ntap-20190517-0005/ Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-667 Improper Locking cwe source acceptance level NIST   Contributor acceptance level Red Hat, Inc.  

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Change History

8 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-3901
NVD Published Date:
04/22/2019
NVD Last Modified:
12/04/2020
Source:
Red Hat, Inc.