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.
6.4	$0-$5k	0.00

A vulnerability classified as critical was found in Linux Kernel 4.9.x (Operating System). Affected by this vulnerability is an unknown code block of the file kernel/bpf/verifier.c of the component Extended BPF Verifier. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect confidentiality, integrity, and availability.

The bug was discovered 12/22/2017. The weakness was published 12/18/2017 by Jann Horn as confirmed patch (Mailing List). The advisory is shared at anonscm.debian.org. This vulnerability is known as CVE-2017-17863 since 12/23/2017. An attack has to be approached locally. The requirement for exploitation is a single authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 105433 (Debian DSA-4073-1 : linux - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197013 (Ubuntu Security Notification for Linux Vulnerabilities (USN-3523-1) (Meltdown)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at anonscm.debian.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (105433), SecurityFocus (BID 102321†) and SecurityTracker (ID 1040058†).

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.9.x

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: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
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: Integer overflow
CWE: CWE-190 / CWE-189
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: 105433
Nessus Name: Debian DSA-4073-1 : linux - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 103137
OpenVAS Name: Panda Global Protection System Crash DoS Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: anonscm.debian.org

Timelineinfo

12/18/2017 🔍
12/18/2017 +0 days 🔍
12/22/2017 +4 days 🔍
12/23/2017 +1 days 🔍
12/23/2017 +0 days 🔍
12/26/2017 +3 days 🔍
12/26/2017 +0 days 🔍
12/27/2017 +1 days 🔍
12/27/2017 +0 days 🔍
01/19/2023 +1849 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: usn-3523-2
Researcher: Jann Horn
Status: Confirmed

CVE: CVE-2017-17863 (🔍)
OVAL: 🔍

SecurityFocus: 102321 - Linux Kernel CVE-2017-17863 Local Denial of Service Vulnerability
SecurityTracker: 1040058

Entryinfo

Created: 12/27/2017 09:04 AM
Updated: 01/19/2023 07:40 AM
Changes: 12/27/2017 09:04 AM (83), 12/17/2019 07:43 PM (4), 01/28/2021 08:09 AM (2), 01/19/2023 07:33 AM (3), 01/19/2023 07:40 AM (1)
Complete: 🔍
Cache ID: 3:A08:40

Discussion

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