VulnerabilityModified

CVE-2019-3901

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

MEDIUM 4.7EPSS 0.34%

Does this matter?

Lower severity and a low EPSS score (0.34%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.1: 4.7 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS: 0.34% probability · 27th percentile
CISA KEV: Not listed
Weakness: CWE-667
Affected: linux/linux kernel · debian/debian linux · netapp/active iq unified manager for vmware vsphere · netapp/hci management node · netapp/snapprotect · netapp/solidfire · netapp/storage replication adapter for clustered data ontap for vmware vsphere · netapp/vasa provider for clustered data ontap · netapp/virtual storage console for vmware vsphere · netapp/cn1610 firmware
Source: secalert@redhat.com

References

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.