Fabrice Bellard QEMU qcow2_open null pointer dereference

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CTI Interest Score
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A vulnerability classified as problematic was found in Fabrice Bellard QEMU (Virtualization Software) (the affected version unknown). This vulnerability affects the function qcow2_open. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability.

The weakness was released 03/26/2014 by Kevin Wolf with Red Hat as [Qemu-devel] [PATCH for-2.0 00/47] block: image format input validation as confirmed posting (Mailing List). The advisory is shared for download at lists.gnu.org. This vulnerability was named CVE-2014-0146 since 12/03/2013. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 73656 (CentOS 6 : qemu-kvm (CESA-2014:0420)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 166916 (SUSE Enterprise Linux Security Update for kvm (SUSE-SU-2014:0623-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at lists.gnu.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (92142) and Tenable (73656).






CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.5

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Class: Null pointer dereference
CWE: CWE-476 / CWE-404

Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

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Nessus ID: 73656
Nessus Name: CentOS 6 : qemu-kvm (CESA-2014:0420)
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OpenVAS ID: 881925
OpenVAS Name: CentOS Update for qemu-guest-agent CESA-2014:0420 centos6
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Recommended: Patch
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Patch: lists.gnu.org


12/03/2013 🔍
03/26/2014 +113 days 🔍
03/26/2014 +0 days 🔍
03/26/2014 +0 days 🔍
03/26/2014 +0 days 🔍
04/01/2014 +6 days 🔍
04/15/2014 +14 days 🔍
06/05/2014 +51 days 🔍
08/10/2017 +1162 days 🔍
06/16/2021 +1406 days 🔍


Vendor: bellard.org

Advisory: [Qemu-devel] [PATCH for-2.0 00/47] block: image format input validation
Researcher: Kevin Wolf
Organization: Red Hat
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-0146 (🔍)

X-Force: 92142 - QEMU qcow2_open() denial of service, Low Risk
Vulnerability Center: 44771 - QEMU <2.0 Local DoS due to Null Dereference in qcow2_open(), Low
SecurityFocus: 66472 - QEMU CVE-2014-0146 NULL Pointer Dereference Local Denial of Service Vulnerability
Secunia: 57878 - Qemu virtio-net "virtio_net_handle_mac()" Integer Overflow Vulnerability, Not Critical


Created: 04/01/2014 02:34 PM
Updated: 06/16/2021 12:26 PM
Changes: 04/01/2014 02:34 PM (81), 05/29/2017 11:56 AM (1), 06/16/2021 12:11 PM (4), 06/16/2021 12:18 PM (11), 06/16/2021 12:26 PM (1)
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Cache ID: 44:993:40


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