Fabrice Bellard QEMU up to 1.7.1 hw/net/virtio-net.c virtio_net_load memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

A vulnerability classified as problematic was found in Fabrice Bellard QEMU up to 1.7.1 (Virtualization Software). Affected by this vulnerability is the function virtio_net_load of the file hw/net/virtio-net.c. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Buffer overflow in virtio_net_load function in net/virtio-net.c in QEMU 1.3.0 through 1.7.x before 1.7.2 might allow remote attackers to execute arbitrary code via a large MAC table.

The weakness was disclosed 02/18/2014 by Petr Matousek as Bug 1066337 as confirmed bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is known as CVE-2013-4149 since 06/12/2013. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The advisory points out:

An user able to alter the savevm data (either on the disk or over the wire during migration) could use this flaw to to corrupt QEMU process memory on the (destination) host, which could potentially result in arbitrary code execution on the host with the privileges of the QEMU process.

The vulnerability scanner Nessus provides a plugin with the ID 74047 (Fedora 20 : qemu-1.6.2-5.fc20 (2014-6288)), 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 157057 (Oracle Enterprise Linux Security Update for qemu-kvm (ELSA-2015-0349)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.qemu.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 (93224) and Tenable (74047). The entries 13023, 13254, 13266 and 13268 are pretty similar.

Not Affected

  • Red Hat Enterprise Linux 5/6

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.9
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

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Current Price Estimation: 🔍

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Nessus ID: 74047
Nessus Name: Fedora 20 : qemu-1.6.2-5.fc20 (2014-6288)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 80056
OpenVAS Name: Oracle Linux Local Check: ELSA-2014-0927
OpenVAS File: 🔍
OpenVAS Family: 🔍

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Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
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Patch: git.qemu.org

Timelineinfo

06/12/2013 🔍
02/18/2014 +251 days 🔍
02/18/2014 +0 days 🔍
05/16/2014 +87 days 🔍
05/19/2014 +3 days 🔍
05/22/2014 +3 days 🔍
08/07/2014 +77 days 🔍
11/04/2014 +89 days 🔍
06/20/2021 +2420 days 🔍

Sourcesinfo

Vendor: bellard.org

Advisory: Bug 1066337
Researcher: Petr Matousek
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-4149 (🔍)
OVAL: 🔍

X-Force: 93224 - QEMU virtio_net_load() code execution, Medium Risk
Vulnerability Center: 45696 - Qemu <1.7.2 Remote Code Execution and DoS due to out-of-bounds Buffer Write on Load in virtio-net, High
SecurityFocus: 67483 - QEMU Multiple Memory Corruption Vulnerabilities
OSVDB: 106049

See also: 🔍

Entryinfo

Created: 05/22/2014 09:46
Updated: 06/20/2021 06:38
Changes: 05/22/2014 09:46 (78), 06/03/2017 07:48 (7), 06/20/2021 06:38 (3)
Complete: 🔍

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