PT-2014-1967 · Linux+5 · Linux Kernel+5

Andrey Ryabinin + 1 · Published 2014-09-16 · Updated 2023-02-12 · CVE-2017-2647

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 3.18

Description The issue is related to the KEYS subsystem in the Linux kernel, which allows local users to gain privileges or cause a denial of service. This can happen through vectors involving a NULL value for a certain match field, related to the keyring search iterator function in keyring.c. The exploitation of this issue can lead to a NULL pointer dereference and system crash.

Recommendations For Linux kernel versions prior to 3.18, update to version 3.18 or later to resolve the issue. As a temporary workaround, consider restricting access to the keyring search iterator function in keyring.c to minimize the risk of exploitation.

Fix

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALT-PU-2014-2452

ALT-PU-2015-1794

BDU:2017-01573

CESA-2017_1842

CVE-2017-2647

DLA-922-1

RHSA-2017:1842

RHSA-2017:2077

RHSA-2017:2437

RHSA-2017:2444

RHSA-2017_1842

RHSA-2017_2077

RHSA-2020:3548

RHSA-2020:3836

RHSA-2020_3548

SUSE-SU-2017:1360-1

SUSE-SU-2017:2342-1

SUSE-SU-2017:2389-1

SUSE-SU-2017:2525-1

SUSE-SU-2017:2920-1

USN-3849-1

USN-3849-2

Affected Products

Alt Linux

Centos

Linux Kernel

Red Hat

Suse

Ubuntu

References · 427

• https://github.com/torvalds/linux/commit/c06cfb08b88dfbe13be44a69ae2fdc3a7c902d81 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2017-2647 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2017-2647 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2017:2077 · Vendor Advisory
• https://usn.ubuntu.com/3849-1 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2017:2444 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2017:1842 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3849-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-2647 · Security Note
• https://ubuntu.com/security/CVE-2018-12896 · Vendor Advisory
• https://bdu.fstec.ru/vul/2017-01573 · Security Note
• https://linux.oracle.com/errata/ELSA-2020-3548.html · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2017:2920-1 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2017:2437 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-18710 · Vendor Advisory