PT-2018-12618 · Linux+1 · Linux Kernel+1

Wade Mealing · Published 2017-12-21 · Updated 2023-02-24 · CVE-2018-14619

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/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 4.15-rc4

Description A flaw was found in the crypto subsystem of the Linux kernel. The issue involves the "null skcipher" being dropped when each af alg ctx is freed instead of when the aead tfm is freed. This can cause the null skcipher to be freed while it is still in use, leading to a local user being able to crash the system or possibly escalate privileges.

Recommendations For Linux kernel versions prior to 4.15-rc4, update to version 4.15-rc4 or later to resolve the issue. As a temporary workaround, consider restricting access to the crypto subsystem to minimize the risk of exploitation.

Fix

Use After Free

RCE

Weakness Enumeration

CWE-416

CWE-20

Related Identifiers

ALT-PU-2017-2819

CVE-2018-14619

RHSA-2018:2948

Affected Products

Alt Linux

Linux Kernel

References · 15

• https://ubuntu.com/security/CVE-2018-14619 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-14619 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-14619 · Security Note
• https://osv.dev/vulnerability/CVE-2018-14619 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-14619 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-14619 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2018-14619 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2018:2948 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b32a7dc8aef1882fbf983eb354837488cc9d54dc · Vendor Advisory
• https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0013 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14619 · Note
• http://openwall.com/lists/oss-security/2018/08/28/1 · Note
• https://t.me/cvenotify/44938 · Telegram Post
• http://securityfocus.com/bid/105200 · Note
• https://git.kernel.org/linus/b32a7dc8aef1882fbf983eb354837488cc9d54dc · Note