CVE-2019-18683

 

Published at: - 04-11-2019 05:15

Last modified: - 26-10-2022 01:44

Total changes: - 5

Description

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

 

Verification logic

 

Reference

• https://www.openwall.com/lists/oss-security/2019/11/02/1
• https://lore.kernel.org/lkml/20191103221719.27118-1-alex.popov@linux.com/
• [oss-security] 20191105 Re: [ Linux kernel ] Exploitable bugs in drivers/media/platform/vivid-Exploit, Mailing List, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20191205-0001/
• openSUSE-SU-2019:2675-Mailing List, Third Party Advisory
• 20200109 [slackware-security] Slackware 14.2 kernel (SSA:2020-008-01)-Mailing List, Patch, Third Party Advisory
• http://packetstormsecurity.com/files/155890/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
• USN-4254-1-Third Party Advisory
• USN-4254-2-Third Party Advisory
• USN-4258-1-Third Party Advisory
• USN-4287-1-Third Party Advisory
• USN-4287-2-Third Party Advisory
• [debian-lts-announce] 20200302 [SECURITY] [DLA 2114-1] linux-4.9 security update-Mailing List, Third Party Advisory
• USN-4284-1-Third Party Advisory

 

Keywords

NVD

 

CVE-2019-18683

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures