Linux Kernel 4.3 PIT Counter arch/x86/kvm/x86.c divide by zero

CVSS Meta Temp Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Linux Kernel 4.3. Affected is an unknown function of the file arch/x86/kvm/x86.c of the component PIT Counter. Executing a manipulation can lead to divide by zero. The identification of this vulnerability is CVE-2015-7513. The attack can only be executed locally. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel 4.3 (Operating System). This vulnerability affects an unknown function of the file arch/x86/kvm/x86.c of the component PIT Counter. The manipulation with an unknown input leads to a divide by zero vulnerability. The CWE definition for the vulnerability is CWE-369. The product divides a value by zero. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

arch/x86/kvm/x86.c in the Linux kernel before 4.4 does not reset the PIT counter values during state restoration, which allows guest OS users to cause a denial of service (divide-by-zero error and host OS crash) via a zero value, related to the kvm_vm_ioctl_set_pit and kvm_vm_ioctl_set_pit2 functions.

The weakness was shared 02/08/2016 by Prasad J Pandit (Website). The advisory is available at github.com. This vulnerability was named CVE-2015-7513 since 09/29/2015. The exploitation appears to be easy. Local access is required to approach this attack. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 87741 (Debian DSA-3434-1 : 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 169149 (SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2016:2245-1)).

Upgrading to version 4.4 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (87741), SecurityFocus (BID 79901†) and Vulnerability Center (SBV-56447†). The entries VDB-79929 and VDB-80802 are related to this item. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 8.2
VulDB Temp Score: 7.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Divide by zero
CWE: CWE-369 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 87741
Nessus Name: Debian DSA-3434-1 : linux - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703434
OpenVAS Name: Debian Security Advisory DSA 3434-1 (linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.4
Patch: git.kernel.org

Timelineinfo

09/29/2015 🔍
01/04/2016 +98 days 🔍
01/04/2016 +0 days 🔍
01/05/2016 +1 days 🔍
01/05/2016 +0 days 🔍
02/07/2016 +32 days 🔍
02/08/2016 +1 days 🔍
02/08/2016 +0 days 🔍
02/08/2016 +0 days 🔍
07/07/2022 +2340 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-2886-1
Researcher: Prasad J Pandit
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-7513 (🔍)
GCVE (CVE): GCVE-0-2015-7513
GCVE (VulDB): GCVE-100-80794

OVAL: 🔍

SecurityFocus: 79901 - Linux Kernel KVM 'kvm_pit_load_count()' Function Divide By Zero Denial of Service Vulnerability
SecurityTracker: 1034602
Vulnerability Center: 56447 - Linux Kernel before 4.4 Local DoS due to not Resetting the PIT Counter Values during State Restoration, Medium

See also: 🔍

Entryinfo

Created: 02/08/2016 09:04
Updated: 07/07/2022 07:26
Changes: 02/08/2016 09:04 (73), 08/22/2018 09:41 (15), 07/07/2022 07:26 (5)
Complete: 🔍
Cache ID: 216:242:103

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