CVE-2017-17449

kernel: Missing namespace check in net/netlink/af_netlink.c allows for network monitors to observe systemwide activity

Severity Score

4.7

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

La función __netlink_deliver_tap_skb en net/netlink/af_netlink.c en el kernel de Linux hasta la versión 4.14.4, cuando CONFIG_NLMON está habilitado, no restringe las observaciones de mensajes Netlink a un espacio de nombres de red único, lo que permite que usuarios locales obtengan información sensible utilizando la capacidad CAP_NET_ADMIN para rastrear una interfaz nlmon para toda la actividad Netlink en el sistema.

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.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-12-06 CVE Reserved
2017-12-07 CVE Published
2023-03-08 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CWE-284: Improper Access Control

CAPEC

References (19)

URL	Tag	Source
http://www.securityfocus.com/bid/102122	Third Party Advisory
https://lkml.org/lkml/2017/12/5/950	Mailing List
https://source.android.com/security/bulletin/pixel/2018-04-01	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2018:0654	2018-05-31
https://access.redhat.com/errata/RHSA-2018:0676	2018-05-31
https://access.redhat.com/errata/RHSA-2018:1062	2018-05-31
https://access.redhat.com/errata/RHSA-2018:1130	2018-05-31
https://access.redhat.com/errata/RHSA-2018:1170	2018-05-31
https://usn.ubuntu.com/3619-1	2018-05-31
https://usn.ubuntu.com/3619-2	2018-05-31
https://usn.ubuntu.com/3653-1	2018-05-31
https://usn.ubuntu.com/3653-2	2018-05-31
https://usn.ubuntu.com/3655-1	2018-05-31
https://usn.ubuntu.com/3655-2	2018-05-31
https://usn.ubuntu.com/3657-1	2018-05-31
https://www.debian.org/security/2017/dsa-4073	2018-05-31
https://www.debian.org/security/2018/dsa-4082	2018-05-31
https://access.redhat.com/security/cve/CVE-2017-17449	2018-04-17
https://bugzilla.redhat.com/show_bug.cgi?id=1525762	2018-04-17

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				<= 4.14.4 Search vendor "Linux" for product "Linux Kernel" and version " <= 4.14.4"		-		Affected