Ubuntu Linux 18.04 LTS/18.10 Kernel information disclosure

EntryHistoryDiffjsonxmlCTI

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.
3.2	$0-$5k	0.00

A vulnerability classified as problematic was found in Ubuntu Linux 18.04 LTS/18.10 (Operating System). This vulnerability affects an unknown part of the component Kernel. The manipulation with an unknown input 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 Linux kernel, as used in Ubuntu 18.04 LTS and Ubuntu 18.10, allows local users to obtain names of files in which they would not normally be able to access via an overlayfs mount inside of a user namespace.

The bug was discovered 09/20/2018. The weakness was published 10/26/2018 (Website). The advisory is available at launchpad.net. This vulnerability was named CVE-2018-6559 since 02/01/2018. Local access is required to approach this attack. A single authentication is necessary for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 36 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 119302 (Ubuntu 18.10 : linux-aws vulnerabilities (USN-3832-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197316 (Ubuntu Security Notification for Linux-aws Vulnerabilities (USN-3832-1)).

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

The vulnerability is also documented in the vulnerability database at Tenable (119302). Similar entries are available at 125740, 125976 and 126963.

Productinfo

Type

Operating System

Vendor

Ubuntu

Name

Linux

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: 3.3
VulDB Meta Temp Score: 3.2

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

NVD Base Score: 3.3
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
ATT&CK: T1592

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: 119302
Nessus Name: Ubuntu 18.10 : linux-aws vulnerabilities (USN-3832-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

02/01/2018 🔍
09/20/2018 +230 days 🔍
10/19/2018 +29 days 🔍
10/26/2018 +6 days 🔍
10/26/2018 +0 days 🔍
10/27/2018 +1 days 🔍
11/30/2018 +34 days 🔍
11/30/2018 +0 days 🔍
06/03/2023 +1646 days 🔍

Sourcesinfo

Vendor: ubuntu.com

Advisory: USN-3832-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-6559 (🔍)
SecurityFocus: 105752 - Linux Kernel CVE-2018-6559 Local Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 10/27/2018 18:15
Updated: 06/03/2023 09:47
Changes: 10/27/2018 18:15 (75), 06/20/2020 14:26 (6), 06/03/2023 09:47 (3)
Complete: 🔍