CVE-2017-17449

Impact:
Moderate
Public Date:
2017-12-05
CWE:
CWE-284
Bugzilla:
1525762: CVE-2017-17449 kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe systemwide activity
The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel, through 4.14.4, does not restrict observations of Netlink messages to a single net namespace, when CONFIG_NLMON is enabled. This allows local users to obtain sensitive information by leveraging the CAP_NET_ADMIN capability to sniff an nlmon interface for all Netlink activity on the system.

Find out more about CVE-2017-17449 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5 and 6, as a code with the flaw is not present or is not built in the products listed.

This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 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 3.3
CVSS3 Base Metrics CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Impact None
Availability Impact None

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 7 (kernel) RHSA-2018:1062 2018-04-10
Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2018:1170 2018-04-17
Red Hat Enterprise Linux 7 (kernel-alt) RHSA-2018:0654 2018-04-10
Red Hat Enterprise Linux Extended Update Support 7.4 (kernel) RHSA-2018:1130 2018-04-17
Red Hat Enterprise Linux for Real Time for NFV (v. 7) (kernel-rt) RHSA-2018:0676 2018-04-10

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 8 kernel Not affected
Red Hat Enterprise Linux 6 kernel Not affected
Red Hat Enterprise Linux 5 kernel Not affected
Last Modified