PT-2019-2798 · Linux+5 · Linux Kernel+5

Jann Horn · Published 2019-06-07 · Updated 2021-05-28 · CVE-2019-13233

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.1.9

Description The issue is related to a use-after-free condition in the Linux kernel, specifically in the arch/x86/lib/insn-eval.c file. This condition arises due to a race between the modify ldt() function and a #BR exception that occurs for an MPX bounds violation. The vulnerability can potentially be exploited to elevate privileges.

Recommendations For Linux kernel versions prior to 5.1.9, update to version 5.1.9 or later to resolve the issue.

Exploit

Fix

Race Condition

Use After Free

Weakness Enumeration

CWE-362

CWE-416

Related Identifiers

ALT-PU-2019-2116

ALT-PU-2019-2117

ALT-PU-2019-2120

ALT-PU-2019-2311

ALT-PU-2020-1198

ALT-PU-2020-1501

ALT-PU-2020-2410

ALT-PU-2020-2433

ALT-PU-2021-1870

BDU:2019-02751

CESA-2019_3309

CESA-2019_3517

CESA-2020_1016

CVE-2019-13233

DSA-4495-1

OPENSUSE-SU-2019:1757-1

OPENSUSE-SU-2019_1757-1

RHSA-2019:3309

RHSA-2019:3517

RHSA-2019_3309

RHSA-2019_3517

RHSA-2020:1016

RHSA-2020:1070

RHSA-2020:2522

RHSA-2020:2851

RHSA-2020_1016

RHSA-2020_1070

SUSE-SU-2019:1854-1

SUSE-SU-2019:2069-1

SUSE-SU-2019:2232-1

SUSE-SU-2019:2430-1

SUSE-SU-2019_2232-1

USN-4093-1

USN-4094-1

USN-4117-1

USN-4118-1

Affected Products

Alt Linux

Centos

Linux Kernel

Red Hat

Suse

Ubuntu

References · 702

• 🔥 https://bugs.chromium.org/p/project-zero/issues/detail?id=1879 · Exploit
• https://github.com/torvalds/linux/commit/de9f869616dd95e95c00bdd6b0fcd3421e8a4323 · Patch
• https://ubuntu.com/security/CVE-2018-14609 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-11884 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-2024 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-14616 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-15212 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-15218 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-15292 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-13272 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-15221 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2019:3309 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-15220 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-13233 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-4117-1 · Vendor Advisory