CVE-2017-17449

MEDIUM

Linux Kernel < 4.14.4 - Sensitive Information Exposure via Netlink Namespace Bypass

Title source: llm
STIX 2.1

Description

The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel through 4.14.4, when CONFIG_NLMON is enabled, does not restrict observations of Netlink messages to a single net namespace, which 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.

References (17)

Core 17
Core References
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3619-2/
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2018/dsa-4082
Mailing List, Third Party Advisory x_refsource_misc
https://lkml.org/lkml/2017/12/5/950
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/102122
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:1062
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:0654
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:0676
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3653-2/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3655-1/
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:1170
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:1130
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2017/dsa-4073
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3655-2/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3653-1/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3657-1/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3619-1/

Scores

CVSS v3 4.7
EPSS 0.0044
EPSS Percentile 35.0%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Details

CWE
CWE-200
Status published
Products (1)
linux/linux_kernel < 4.14.4
Published Dec 07, 2017
Tracked Since Feb 18, 2026