CVE-2019-3901

low-risk
Published 2019-04-22

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.

Do I need to act?

-
0.07% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.7/10 Medium
LOCAL / HIGH complexity

Affected Products (10)

Active Iq Unified Manager For Vmware Vsphere
Storage Replication Adapter For Clustered Data Ontap For Vmware Vsphere
Virtual Storage Console For Vmware Vsphere

Affected Vendors

Debian Linux Netapp

References (10)

Third Party Advisory http://www.securityfocus.com/bid/89937
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3901
Mailing List https://lists.debian.org/debian-lts-announce/2019/05/msg00041.html
Mailing List https://lists.debian.org/debian-lts-announce/2019/05/msg00042.html
Third Party Advisory https://security.netapp.com/advisory/ntap-20190517-0005/
Third Party Advisory http://www.securityfocus.com/bid/89937
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3901
Mailing List https://lists.debian.org/debian-lts-announce/2019/05/msg00041.html
Mailing List https://lists.debian.org/debian-lts-announce/2019/05/msg00042.html
Third Party Advisory https://security.netapp.com/advisory/ntap-20190517-0005/
28
/ 100
low-risk
Severity 12/34 · Low
Exploitability 0/34 · Minimal
Exposure 16/34 · Moderate