Linux Kernel 2.6.28.2 update_cr8_intercept input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Linux Kernel 2.6.28.2. This affects the function update_cr8_intercept. The manipulation results in input validation. This vulnerability is reported as CVE-2009-3640. No exploit exists.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel 2.6.28.2 (Operating System). Affected is the function update_cr8_intercept. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

The update_cr8_intercept function in arch/x86/kvm/x86.c in the KVM subsystem in the Linux kernel before 2.6.32-rc1 does not properly handle the absence of an Advanced Programmable Interrupt Controller (APIC), which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly gain privileges via a call to the kvm_vcpu_ioctl function.

The issue has been introduced in 12/25/2008. The weakness was disclosed 10/29/2009 (Website). The advisory is shared for download at xforce.iss.net. This vulnerability is traded as CVE-2009-3640. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 308 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 42864 (openSUSE Security Update : kvm (kvm-1547)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks.

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 (53947), Tenable (42864), SecurityFocus (BID 36805†) and Vulnerability Center (SBV-25802†). The entry VDB-50651 is pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.2
VulDB Temp Score: 6.2
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: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 42864
Nessus Name: openSUSE Security Update : kvm (kvm-1547)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 66313
OpenVAS Name: SLES11: Security update for KVM
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/25/2008 🔍
10/09/2009 +287 days 🔍
10/23/2009 +14 days 🔍
10/23/2009 +0 days 🔍
10/29/2009 +6 days 🔍
10/29/2009 +0 days 🔍
05/20/2010 +203 days 🔍
03/18/2015 +1763 days 🔍
08/24/2021 +2351 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: xforce.iss.net
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-3640 (🔍)
GCVE (CVE): GCVE-0-2009-3640
GCVE (VulDB): GCVE-100-50652
X-Force: 53947
SecurityFocus: 36805 - Linux Kernel KVM 'update_cr8_intercept()' Local Denial of Service Vulnerability
Vulnerability Center: 25802 - Linux Kernel Prior to 2.6.32-rc1 Local DoS Vulnerability via kvm_vcpu_ioctl Function, Medium

See also: 🔍

Entryinfo

Created: 03/18/2015 15:15
Updated: 08/24/2021 21:59
Changes: 03/18/2015 15:15 (58), 02/24/2017 16:55 (10), 08/24/2021 21:50 (4), 08/24/2021 21:59 (1)
Complete: 🔍
Cache ID: 216::103

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