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.
4.9	$0-$5k	0.00

A vulnerability was found in Linux Kernel 3.12.5 (Operating System). It has been rated as problematic. Affected by this issue is the function apic_cluster_id of the file kvm/lapic.c. The manipulation with an unknown input leads to a numeric error vulnerability. Using CWE to declare the problem leads to CWE-189. Impacted is availability. CVE summarizes:

The recalculate_apic_map function in arch/x86/kvm/lapic.c in the KVM subsystem in the Linux kernel through 3.12.5 allows guest OS users to cause a denial of service (host OS crash) via a crafted ICR write operation in x2apic mode.

The weakness was published 12/12/2013 by Lars Bull as fix guest-initiated crash with x2apic as not defined git commit (GIT Repository). The advisory is available at github.com. This vulnerability is handled as CVE-2013-6376 since 11/04/2013. The exploitation is known to be difficult. Local access is required to approach this attack. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 71593 (Fedora 20 : kernel-3.12.5-302.fc20 (2013-23445)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195765 (Ubuntu Security Notification for Linux-lts-saucy Vulnerabilities (USN-2113-1)).

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

The vulnerability is also documented in the vulnerability database at Tenable (71593). Similar entries are available at 11224, 11441, 11507 and 65499.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 3.12.5

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: 5.1
VulDB Meta Temp Score: 4.9

VulDB Base Score: 5.1
VulDB Temp Score: 4.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

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: Numeric error
CWE: 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: 71593
Nessus Name: Fedora 20 : kernel-3.12.5-302.fc20 (2013-23445)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 867183
OpenVAS Name: Fedora Update for kernel FEDORA-2013-23653
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: github.com

Timelineinfo

11/04/2013 🔍
12/12/2013 +38 days 🔍
12/12/2013 +0 days 🔍
12/14/2013 +2 days 🔍
12/14/2013 +0 days 🔍
12/16/2013 +2 days 🔍
12/17/2013 +1 days 🔍
06/04/2021 +2726 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: fix guest-initiated crash with x2apic
Researcher: Lars Bull
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-6376 (🔍)
OVAL: 🔍

Vulnerability Center: 42592 - Linux Kernel 3 Through 3.12.5 Remote DoS via a Malicious ICR Write Operation in x2apic Mode, Medium
SecurityFocus: 64319
OSVDB: 100987

See also: 🔍

Entryinfo

Created: 12/16/2013 11:33
Updated: 06/04/2021 11:32
Changes: 12/16/2013 11:33 (75), 05/17/2017 09:13 (2), 06/04/2021 11:32 (3)
Complete: 🔍
Committer: olku

Discussion

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