PT-2019-4498 · Linux+5 · Linux Kernel+5

Published 2019-03-29 · Updated 2023-01-20 · CVE-2019-20054

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/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 5.0.6

Description The issue is related to a NULL pointer dereference in the drop sysctl table() function in the Linux kernel, specifically in fs/proc/proc sysctl.c, and is connected to the put links command. This could allow an attacker to gain unauthorized access to protected information.

Recommendations For Linux kernel versions prior to 5.0.6, update to version 5.0.6 or later to resolve the issue. As a temporary workaround, consider restricting access to the drop sysctl table() function and the put links command until a patch is available.

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALSA-2020:4431

ALT-PU-2019-1584

ALT-PU-2019-1710

ALT-PU-2020-1198

ALT-PU-2020-1501

ALT-PU-2020-2410

ALT-PU-2020-2433

ALT-PU-2021-1870

BDU:2020-00357

CESA-2020_4060

CESA-2020_4431

CESA-2020_4609

CVE-2019-20054

OPENSUSE-SU-2020:0336-1

OPENSUSE-SU-2020_0336-1

RHSA-2020:1493

RHSA-2020:4060

RHSA-2020:4062

RHSA-2020:4431

RHSA-2020:4609

RHSA-2020_4060

RHSA-2020_4062

RHSA-2020_4431

RHSA-2020_4609

SUSE-SU-2020:0093-1

SUSE-SU-2020:0511-1

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-2020:0613-1

SUSE-SU-2020:1255-1

SUSE-SU-2020:1275-1

SUSE-SU-2020:1663-1

SUSE-SU-2020_1663-1

Affected Products

Alt Linux

Almalinux

Centos

Linux Kernel

Red Hat

Suse

References · 871

• https://cve.org/CVERecord?id=CVE-2019-20054 · Security Note
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.6 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:0584-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-20054 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=23da9588037ecdd4901db76a5b79a42b529c4ec3 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:1663-1 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=89189557b47b35683a27c80ee78aef18248eefb4 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2020-4431.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-20054 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2020-5866.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-20054 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:1275-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-20054 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2020:0511-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2019-20054 · Vendor Advisory