PT-2016-3428 · Linux+5 · Linux Kernel+5

Published 2016-08-31 · Updated 2020-04-08 · CVE-2019-11190

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 4.8

Description The issue is related to a race condition in the load elf binary() function in fs/binfmt elf.c, which allows local users to bypass Address Space Layout Randomization (ASLR) on setuid programs. This is due to the install exec creds() function being called too late, resulting in a race condition when reading /proc/pid/stat. The vulnerability can be exploited to bypass ASLR and potentially disclose sensitive information.

Recommendations For Linux kernel versions prior to 4.8, update to version 4.8 or later to resolve the issue. As a temporary workaround, consider restricting access to setuid programs, such as /bin/su, to minimize the risk of exploitation.

Exploit

Fix

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

ALT-PU-2016-2218

ALT-PU-2017-1330

BDU:2022-03979

CESA-2020_1016

CVE-2019-11190

DLA-1799-1

DLA-1799-2

OPENSUSE-SU-2019_1570-1

RHSA-2020:1016

RHSA-2020:1070

RHSA-2020_1016

RHSA-2020_1070

SUSE-SU-2019:14089-1

SUSE-SU-2019:1527-1

SUSE-SU-2019:1532-1

SUSE-SU-2019:1533-1

SUSE-SU-2019:1534-1

SUSE-SU-2019:1692-1

SUSE-SU-2019_14089-1

USN-4008-1

USN-4008-2

USN-4008-3

Affected Products

Alt Linux

Centos

Linux Kernel

Red Hat

Suse

Ubuntu

References · 177

• 🔥 https://openwall.com/lists/oss-security/2019/04/03/4/1 · Exploit
• 🔥 https://openwall.com/lists/oss-security/2019/04/03/4 · Exploit
• https://ubuntu.com/security/CVE-2019-11815 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2019-4644.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-11190 · Vendor Advisory
• https://osv.dev/vulnerability/USN-4008-1 · Vendor Advisory
• https://usn.ubuntu.com/4008-3 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/commit/?id=e1676b55d874a43646e8b2c46d87f2f3e45516ff · Patch
• https://usn.ubuntu.com/4008-2 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2019:14089-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-11190 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-11190 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2019-11190 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2019-4642.html · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html · Vendor Advisory