CVE-2019-18683
6.9 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:C/I:C/A:C
7 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.9 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
10.1%
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.
Affected configurations
References
lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html
packetstormsecurity.com/files/155890/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
www.openwall.com/lists/oss-security/2019/11/05/1
lists.debian.org/debian-lts-announce/2020/03/msg00001.html
lore.kernel.org/lkml/20191103221719.27118-1-alex.popov%40linux.com/
seclists.org/bugtraq/2020/Jan/10
security.netapp.com/advisory/ntap-20191205-0001/
usn.ubuntu.com/4254-1/
usn.ubuntu.com/4254-2/
usn.ubuntu.com/4258-1/
usn.ubuntu.com/4284-1/
usn.ubuntu.com/4287-1/
usn.ubuntu.com/4287-2/
www.openwall.com/lists/oss-security/2019/11/02/1
Related
6.9 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:C/I:C/A:C
7 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.9 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
10.1%