CVE-2017-18017

Impact:
Moderate
Public Date:
2018-01-03
CWE:
CWE-119
Bugzilla:
1531135: CVE-2017-18017 kernel: netfilter: use-after-free in tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c
The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before 4.11, and 4.9.x before 4.9.36, allows remote attackers to cause a denial of service (use-after-free and memory corruption) or possibly have unspecified other impact by leveraging the presence of xt_TCPMSS in an iptables action. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely.

Find out more about CVE-2017-18017 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5. This is not currently planned to be addressed in future updates of the product due to its life cycle. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6, 7, its real-time kernel, Red Hat Enterprise MRG 2, Red Hat Enterprise Linux 7 for ARM 64 and Red Hat Enterprise Linux 7 for Power 9 LE. Future Linux kernel updates for the respective releases may address this issue.

CVSS v3 metrics

CVSS3 Base Score 6.5
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Impact Low
Availability Impact High

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 7 (kernel) RHSA-2018:1062 2018-04-10
Red Hat Enterprise Linux for Real Time for NFV (v. 7) (kernel-rt) RHSA-2018:0676 2018-04-10
Red Hat Enterprise Linux 6 (kernel) RHSA-2018:1319 2018-05-08
Red Hat Enterprise Linux Extended Update Support 7.3 (kernel) RHSA-2018:1737 2018-05-29
Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2018:1170 2018-04-17
Red Hat Enterprise Linux Extended Update Support 7.4 (kernel) RHSA-2018:1130 2018-04-17

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 8 kernel Not affected
Red Hat Enterprise Linux 7 kernel-alt Not affected
Red Hat Enterprise Linux 5 kernel Will not fix
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.
Last Modified