National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 4.7 MEDIUM
Vector: AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N (V3 legend)
Impact Score: 3.6
Exploitability Score: 1.0


Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

CVSS v2.0 Severity and Metrics:

Base Score: 1.9 LOW
Vector: (AV:L/AC:M/Au:N/C:P/I:N/A:N) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 3.4


Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): None
Availability (A): None
Additional Information:
Allows unauthorized disclosure of information

References to Advisories, Solutions, and Tools

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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
https://lists.debian.org/debian-lts-announce/2019/05/msg00042.html
https://security.netapp.com/advisory/ntap-20190517-0005/

Technical Details

Vulnerability Type (View All)

  • Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (CWE-362)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
4.8


Change History

5 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-3901
NVD Published Date:
04/22/2019
NVD Last Modified:
05/28/2019