Linux Kernel 4.0.5 on x86 KVM Virtualization Support kvm_apic_has_events null pointer dereference

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CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

A vulnerability was found in Linux Kernel 4.0.5 on x86 (Operating System) and classified as problematic. Affected by this issue is the function kvm_apic_has_events of the component KVM Virtualization Support. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-476. Impacted is availability.

The weakness was disclosed 06/30/2015 as Bug 1230770 as confirmed bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability is handled as CVE-2015-4692 since 06/19/2015. The attack needs to be approached locally. A simple authentication is necessary for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 58628 (Fedora 16 : openstack-keystone-2011.3.1-3.fc16 (2012-4960)), 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 175492 (Debian Security Update for linux (DSA 3329-1)).

Upgrading to version 4.0.6-300.fc22 eliminates this vulnerability. The upgrade is hosted for download at kernel.org. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 19305.

The vulnerability is also documented in the databases at SecurityFocus (BID 60688), X-Force (104441), Secunia (SA53349), Vulnerability Center (SBV-51611) and Tenable (58628). The entries 76062, 76831, 76848 and 76872 are pretty similar.

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VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.5
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2infoedit

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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VulDB Reliability: 🔍

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Exploitinginfoedit

Class: Denial of service
CWE: CWE-476
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 58628
Nessus Name: Fedora 16 : openstack-keystone-2011.3.1-3.fc16 (2012-4960)
Nessus File: 🔍
Nessus Family: 🔍

OpenVAS ID: 703329
OpenVAS Name: Debian Security Advisory DSA 3329-1 (linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfoedit

Threat: 🔍
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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.0.6-300.fc22
TippingPoint: 🔍
ISS Proventia IPS: 🔍
Fortigate IPS: 🔍

Timelineinfoedit

06/19/2013 🔍
10/04/2013 +107 days 🔍
06/10/2015 +614 days 🔍
06/19/2015 +9 days 🔍
06/30/2015 +11 days 🔍
07/09/2015 +9 days 🔍
07/27/2015 +18 days 🔍
07/28/2015 +1 days 🔍
12/26/2016 +517 days 🔍
08/03/2017 +220 days 🔍

Sourcesinfoedit

Vendor: https://www.kernel.org/

Advisory: Bug 1230770
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-4692 (🔍)
OVAL: 🔍

SecurityFocus: 60688 - OTRS CVE-2013-4088 Remote Security Bypass Vulnerability
Secunia: 53349 - Media Player Classic M2TS and RM File Processing Buffer Overflow Vulnerabilties, Highly Critical
X-Force: 104441 - Linux Kernel kvm_apic_has_events denial of service
Vulnerability Center: 51611 - OTRS 3.0.0 - 3.0.21, 3.1.0 - 3.1.17, 3.2.0 - 3.2.8 Remote Information Disclosure via TicketWatch, Medium

See also: 🔍

Entryinfoedit

Created: 07/09/2015 10:09 AM
Updated: 08/03/2017 03:20 AM
Changes: (11) vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai advisory_confirm_url source_oval_id source_secunia_date source_securityfocus_date source_securityfocus_class
Complete: 🔍

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