high
7
CWE
362 416
Advisory Published
Updated

CVE-2019-18683: Race Condition

First published: Mon Nov 04 2019(Updated: )

An issue was discovered in drivers/media/platform/vivid in the Linux kernel through 5.3.8. It is exploitable for privilege escalation on some Linux distributions where local users have /dev/video0 access, but only if the driver happens to be loaded. There are multiple race conditions during streaming stopping in this driver (part of the V4L2 subsystem). These issues are caused by wrong mutex locking in vivid_stop_generating_vid_cap(), vivid_stop_generating_vid_out(), sdr_cap_stop_streaming(), and the corresponding kthreads. At least one of these race conditions leads to a use-after-free.

Credit: cve@mitre.org cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Linux Kernel>=3.18<4.4.204
Linux Kernel>=4.5<4.9.204
Linux Kernel>=4.10<4.14.157
Linux Kernel>=4.15<4.19.87
Linux Kernel>=4.20<5.3.14
Linux Kernel>=5.4<5.4.1
Ubuntu Linux=14.04
Ubuntu Linux=16.04
Ubuntu Linux=18.04
Ubuntu Linux=19.10
openSUSE=15.1
NetApp Active IQ Unified Manager for VMware vSphere
netapp cloud backup
netapp data availability services
NetApp E-Series SANtricity OS Controller>=11.0.0<=11.70.1
NetApp Element Software
netapp hci management node
netapp solidfire
NetApp SteelStore
broadcom fabric operating system
All of
NetApp AFF A700s Firmware
netapp a700s
All of
NetApp AFF 8300 Firmware
NetApp FAS8300
All of
NetApp AFF 8700 Firmware
NetApp FAS8700
All of
NetApp AFF A400 Firmware
NetApp FAS A400
All of
netapp h610s firmware
netapp h610s
Debian GNU/Linux=8.0
debian/linux
5.10.223-1
5.10.226-1
6.1.123-1
6.1.128-1
6.12.12-1
6.12.15-1
Ubuntu=14.04
Ubuntu=16.04
Ubuntu=18.04
Ubuntu=19.10
Debian=8.0
Linux Kernel<=5.3.8
NetApp AFF A700s Firmware
netapp a700s
NetApp AFF 8300 Firmware
NetApp FAS8300
NetApp AFF 8700 Firmware
NetApp FAS8700
NetApp AFF A400 Firmware
NetApp FAS A400
netapp h610s firmware
netapp h610s

Remedy

https://lore.kernel.org/lkml/20191103221719.27118-1-alex.popov@linux.com/

Remedy

https://seclists.org/bugtraq/2020/Jan/10

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2019-18683?

    CVE-2019-18683 has been assigned a severity rating that indicates a potential for privilege escalation under specific conditions.

  • How do I fix CVE-2019-18683?

    To fix CVE-2019-18683, upgrade your Linux kernel to version 5.10.223-1 or later.

  • Which Linux distributions are affected by CVE-2019-18683?

    CVE-2019-18683 affects several Linux distributions where local users have access to /dev/video0 and the vivid driver is loaded.

  • What kind of vulnerability is CVE-2019-18683?

    CVE-2019-18683 is a privilege escalation vulnerability due to race conditions in the Linux kernel's vivid driver.

  • Is CVE-2019-18683 exploitable remotely?

    CVE-2019-18683 is exploitable only by local users, not remotely.

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