CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.9	$0-$5k	0.00

A vulnerability has been found in Linux Kernel up to 4.14.4 (Operating System) and classified as problematic. This vulnerability affects the function __netlink_deliver_tap_skb of the file net/netlink/af_netlink.c. The manipulation as part of a Netlink Message leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

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.

The bug was discovered 12/05/2017. The weakness was presented 12/07/2017 by ERNE (Website). The advisory is shared for download at securityfocus.com. This vulnerability was named CVE-2017-17449 since 12/06/2017. The attack needs to be approached locally. A single authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 105383 (Fedora 26 : kernel (2017-ba6b6e71f7)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 236708 (Red Hat Update for kernel-alt (RHSA-2018:0654)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (105383). See 104316, 110307, 110309 and 110520 for similar entries.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.14.0
• 4.14.1
• 4.14.2
• 4.14.3
• 4.14.4

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.9

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 105383
Nessus Name: Fedora 26 : kernel (2017-ba6b6e71f7)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 831051
OpenVAS Name: Fedora Update for kernel FEDORA-2017-129969aa8a
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

12/05/2017 🔍
12/06/2017 +1 days 🔍
12/06/2017 +0 days 🔍
12/06/2017 +0 days 🔍
12/07/2017 +1 days 🔍
12/07/2017 +0 days 🔍
12/19/2017 +12 days 🔍
12/20/2017 +1 days 🔍
01/17/2023 +1854 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: FEDORA-2017-ba6b6e71f7⛔
Researcher: ERNE
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-17449 (🔍)
OVAL: 🔍

SecurityFocus: 102122 - Linux Kernel 'net/netlink/af_netlink.c' Local Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 12/07/2017 08:07
Updated: 01/17/2023 09:17
Changes: 12/07/2017 08:07 (79), 12/12/2019 16:08 (7), 01/17/2023 09:14 (4), 01/17/2023 09:17 (1)
Complete: 🔍

Discussion

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