PT-2019-4491 · Linux+3 · Linux Kernel+3

Published 2019-12-09 · Updated 2022-03-31 · CVE-2019-19965

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.4.7

Description The issue is related to errors in pointer dereferencing in the Linux kernel component drivers/scsi/libsas/sas discover.c. It may allow an attacker to cause a denial of service due to incorrect handling of port disconnection during discovery, related to a PHY down race condition.

Recommendations For Linux kernel versions prior to 5.4.7, update to version 5.4.7 or later to resolve the issue. As a temporary workaround, consider restricting access to the sas discover.c component until a patch is available.

Exploit

Fix

Race Condition

NULL Pointer Dereference

Weakness Enumeration

CWE-362

CWE-476

Related Identifiers

ALT-PU-2020-1003

ALT-PU-2020-1010

ALT-PU-2020-1043

ALT-PU-2020-1198

ALT-PU-2020-1421

ALT-PU-2020-1450

ALT-PU-2020-1501

ALT-PU-2020-1714

ALT-PU-2020-2410

ALT-PU-2020-2433

ALT-PU-2021-1870

BDU:2020-00350

CVE-2019-19965

DLA-2068-1

DLA-2114-1

OPENSUSE-SU-2020:0336-1

OPENSUSE-SU-2020_0336-1

SUSE-SU-2020:0511-1

SUSE-SU-2020:0558-1

SUSE-SU-2020:0559-1

SUSE-SU-2020:0560-1

SUSE-SU-2020:0580-1

SUSE-SU-2020:0584-1

SUSE-SU-2020:0599-1

SUSE-SU-2020:0605-1

SUSE-SU-2020:0613-1

SUSE-SU-2020:1255-1

SUSE-SU-2020:1275-1

SUSE-SU-2020:14354-1

SUSE-SU-2020:1663-1

SUSE-SU-2020_1663-1

USN-4284-1

USN-4285-1

USN-4286-1

USN-4286-2

USN-4287-1

USN-4287-2

Affected Products

Alt Linux

Linux Kernel

Suse

Ubuntu

References · 657

• 🔥 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f70267f379b5e5e11bdc5d72a56bf17e5feed01f · Exploit
• https://osv.dev/vulnerability/SUSE-SU-2020:0580-1 · Vendor Advisory
• https://osv.dev/vulnerability/USN-4286-2 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-19066 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-19252 · Vendor Advisory
• https://usn.ubuntu.com/4287-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:0511-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-19063 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-19068 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-15220 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-18683 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-14615 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:0558-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-19965 · Security Note
• https://cve.org/CVERecord?id=CVE-2019-19965 · Security Note