Linux Kernel 2.6.28.2 do_insn_fetch input validation

CVSS Meta Temp Score
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CTI Interest Score
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7.5$5k-$25k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel 2.6.28.2 and classified as problematic. This affects the function do_insn_fetch. The manipulation leads to input validation. This vulnerability is documented as CVE-2009-4031. There is not any exploit available.

Detailsinfo

A vulnerability was found in Linux Kernel 2.6.28.2 (Operating System). It has been rated as critical. This issue affects the function do_insn_fetch. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

The do_insn_fetch function in arch/x86/kvm/emulate.c in the x86 emulator in the KVM subsystem in the Linux kernel before 2.6.32-rc8-next-20091125 tries to interpret instructions that contain too many bytes to be valid, which allows guest OS users to cause a denial of service (increased scheduling latency) on the host OS via unspecified manipulations related to SMP support.

The issue has been introduced in 12/25/2008. The weakness was released 11/29/2009 (Website). The advisory is shared at kernel.org. The identification of this vulnerability is CVE-2009-4031 since 11/20/2009. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 339 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 67971 (Oracle Linux 5 : kvm (ELSA-2009-1659)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165235 (SUSE Security Update for Kernel (SUSE-SA:2010:018)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (54478), Tenable (67971), SecurityFocus (BID 37130†), Secunia (SA37720†) and Vulnerability Center (SBV-24416†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.5
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 67971
Nessus Name: Oracle Linux 5 : kvm (ELSA-2009-1659)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 66509
OpenVAS Name: Fedora Core 10 FEDORA-2009-13098 (kernel)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/25/2008 🔍
11/20/2009 +330 days 🔍
11/24/2009 +4 days 🔍
11/24/2009 +0 days 🔍
11/29/2009 +5 days 🔍
11/29/2009 +0 days 🔍
12/14/2009 +15 days 🔍
12/21/2009 +7 days 🔍
07/12/2013 +1299 days 🔍
03/18/2015 +614 days 🔍
08/28/2021 +2355 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: kernel.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-4031 (🔍)
GCVE (CVE): GCVE-0-2009-4031
GCVE (VulDB): GCVE-100-50921

OVAL: 🔍

X-Force: 54478
SecurityFocus: 37130 - Linux Kernel KVM Large SMP Instruction Local Denial of Service Vulnerability
Secunia: 37720 - Fedora update for kernel, Less Critical
Vulnerability Center: 24416 - Linux kernel < 2.6.32-rc8 x86 Emulator KVM Subsystem Local DoS Vulnerability, Medium

Entryinfo

Created: 03/18/2015 15:15
Updated: 08/28/2021 08:03
Changes: 03/18/2015 15:15 (66), 02/18/2017 09:41 (12), 08/28/2021 08:03 (3)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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