PT-2018-2962 · Linux+3 · Linux Kernel+3

Christian Brauner + 1 · Published 2017-12-08 · Updated 2019-10-09 · CVE-2018-14646

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 4.15-rc8

Description The issue is related to a NULL pointer dereference bug in the netlink ns capable() function, located in the net/netlink/af netlink.c file. A local attacker could exploit this bug when a net namespace with a netnsid is assigned, potentially causing a kernel panic and a denial of service.

Recommendations For Linux kernel versions prior to 4.15-rc8, update to version 4.15-rc8 or later to resolve the issue. As a temporary workaround, consider restricting access to the netlink ns capable() function to minimize the risk of exploitation.

Fix

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALT-PU-2017-2771

ALT-PU-2018-1991

BDU:2019-02785

CESA-2018_3651

CVE-2018-14646

RHSA-2018:3651

RHSA-2018:3666

RHSA-2018:3843

RHSA-2018_3651

RHSA-2018_3666

Affected Products

Alt Linux

Centos

Linux Kernel

Red Hat

References · 13

• https://marc.info/?l=linux-netdev&m=151500466401174&w=2 · Patch
• https://access.redhat.com/errata/RHSA-2018:3651 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f428fe4a04cc339166c8bbd489789760de3a0cee · Patch
• https://access.redhat.com/errata/RHSA-2018:3666 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14646 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-14646 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-02785 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2018-14646 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-14646 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-14646 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2018:3843 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-14646 · Security Note
• https://cxsecurity.com/cveshow/CVE-2018-14646 · Note