VDB-133347 · CVE-2019-3460 · BID 105049

Linux Kernel up to 5.0.x information disclosure

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.
5.3	$0-$5k	0.00

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 5.0.x (Operating System). This affects an unknown code. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

A heap data infoleak in multiple locations including L2CAP_PARSE_CONF_RSP was found in the Linux kernel before 5.1-rc1.

The bug was discovered 01/10/2019. The weakness was disclosed 04/11/2019 by Venustech with Adlab of Venustech (Website). It is possible to read the advisory at lore.kernel.org. This vulnerability is uniquely identified as CVE-2019-3460 since 12/31/2018. The exploitability is told to be easy. The attack needs to be initiated within the local network. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 121218 (Fedora 29 : kernel / kernel-headers (2019-f812c9fb22)), 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 172061 (OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2019:0140-1)).

Upgrading to version 5.1-rc1 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (121218). The entries 122735 and 133346 are pretty similar.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

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: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
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: No
Remote: Partially

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: 121218
Nessus Name: Fedora 29 : kernel / kernel-headers (2019-f812c9fb22)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.1-rc1

Timelineinfo

08/07/2018 🔍
12/31/2018 +146 days 🔍
01/10/2019 +10 days 🔍
01/17/2019 +7 days 🔍
01/17/2019 +0 days 🔍
04/11/2019 +84 days 🔍
04/11/2019 +0 days 🔍
08/29/2023 +1601 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: FEDORA-2019-f812c9fb22
Researcher: Venustech
Organization: Adlab of Venustech
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-3460 (🔍)
SecurityFocus: 105049 - Linux Kernel 'mm/percpu.c' Local Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 04/11/2019 21:05
Updated: 08/29/2023 07:11
Changes: 04/11/2019 21:05 (77), 05/29/2020 09:37 (4), 08/29/2023 06:59 (4), 08/29/2023 07:11 (1)
Complete: 🔍