Linux Kernel 3.10/3.12/3.13 Boundary Condition complete_emulated_mmio memory corruption

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7.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel 3.10/3.12/3.13 and classified as problematic. The impacted element is the function complete_emulated_mmio of the component Boundary Condition Handler. The manipulation results in memory corruption. This vulnerability is reported as CVE-2014-0049. No exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel 3.10/3.12/3.13 (Operating System). Affected is the function complete_emulated_mmio of the component Boundary Condition Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Buffer overflow in the complete_emulated_mmio function in arch/x86/kvm/x86.c in the Linux kernel before 3.13.6 allows guest OS users to execute arbitrary code on the host OS by leveraging a loop that triggers an invalid memory copy affecting certain cancel_work_item data.

The weakness was disclosed 02/27/2014 by Lars Bull with Google as kvm: x86: fix emulator buffer overflow as confirmed git commit (GIT Repository). The advisory is shared for download at git.kernel.org. The public release has been coordinated in cooperation with the vendor. This vulnerability is traded as CVE-2014-0049 since 12/03/2013. 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 scanner Nessus provides a plugin with the ID 73728 (Ubuntu 13.10 : linux vulnerabilities (USN-2179-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195454 (Ubuntu Security Notification for Linux kernel (Raring HWE) Vulnerabilities (USN-2176-1)).

Applying the patch kvm: x86: fix emulator buffer overflow is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

The vulnerability is also documented in the databases at X-Force (91492), Tenable (73728), SecurityFocus (BID 65909†), Secunia (SA57213†) and Vulnerability Center (SBV-43444†). Once again VulDB remains the best source for vulnerability data.

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CPE 2.3info

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 7.3

VulDB Base Score: 8.4
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 73728
Nessus Name: Ubuntu 13.10 : linux vulnerabilities (USN-2179-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 867583
OpenVAS Name: Fedora Update for kernel FEDORA-2014-3442
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: kvm: x86: fix emulator buffer overflow

Timelineinfo

12/03/2013 🔍
02/27/2014 +86 days 🔍
03/03/2014 +4 days 🔍
03/03/2014 +0 days 🔍
03/03/2014 +0 days 🔍
03/04/2014 +1 days 🔍
03/06/2014 +2 days 🔍
03/11/2014 +5 days 🔍
04/27/2014 +47 days 🔍
05/07/2026 +4393 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: kvm: x86: fix emulator buffer overflow
Researcher: Lars Bull
Organization: Google
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2014-0049 (🔍)
GCVE (CVE): GCVE-0-2014-0049
GCVE (VulDB): GCVE-100-12492

OVAL: 🔍

X-Force: 91492 - Linux Kernel complete_emulated_mmio() privilege escalation, High Risk
SecurityFocus: 65909 - Linux Kernel 'complete_emulated_mmio()' Function Privilege Escalation Vulnerability
Secunia: 57213 - KVM "complete_emulated_mmio()" Memory Corruption Vulnerability, Less Critical
Vulnerability Center: 43444 - Linux Kernel 3.13.5 Remote Privilege Escalation due to an Error in the complete_emulated_mmio() Function, Critical

Entryinfo

Created: 03/06/2014 14:03
Updated: 05/07/2026 06:21
Changes: 03/06/2014 14:03 (84), 05/22/2017 09:13 (5), 06/15/2021 09:19 (3), 05/07/2026 06:21 (15)
Complete: 🔍
Committer:
Cache ID: 216::103

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