CVE-2017-17448

Impact:
Moderate
Public Date:
2017-12-03
CWE:
CWE-284
Bugzilla:
1525768: CVE-2017-17448 kernel: Missing capabilities check in net/netfilter/nfnetlink_cthelper.c allows for unprivileged access to systemwide nfnl_cthelper_list structure
The net/netfilter/nfnetlink_cthelper.c function in the Linux kernel through 4.14.4 does not require the CAP_NET_ADMIN capability for new, get, and del operations. This allows local users to bypass intended access restrictions because the nfnl_cthelper_list data structure is shared across all net namespaces.

Find out more about CVE-2017-17448 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, 6 and Red Hat Enterprise MRG 2, 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 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 4.4
CVSS3 Base Metrics CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Impact Low
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 Enterprise Linux 7 (kernel-alt) RHSA-2018:0654 2018-04-10
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 MRG 2 realtime-kernel Not affected
Red Hat Enterprise Linux 6 kernel Not affected
Red Hat Enterprise Linux 5 kernel Not affected

Last Modified
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