QEMU hw/i386/multiboot.c load_multiboot Header out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in QEMU. The impacted element is the function load_multiboot of the file hw/i386/multiboot.c. Executing a manipulation as part of Header can lead to out-of-bounds write. This vulnerability is registered as CVE-2017-14167. The attack needs to be launched locally. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in QEMU (Virtualization Software) (unknown version). This vulnerability affects the function load_multiboot of the file hw/i386/multiboot.c. The manipulation as part of a Header leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Integer overflow in the load_multiboot function in hw/i386/multiboot.c in QEMU (aka Quick Emulator) allows local guest OS users to execute arbitrary code on the host via crafted multiboot header address values, which trigger an out-of-bounds write.

The bug was discovered 09/06/2017. The weakness was published 09/08/2017 (oss-sec). The advisory is shared for download at openwall.com. This vulnerability was named CVE-2017-14167 since 09/06/2017. 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 was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 103713 (Debian DLA-1128-1 : qemu-kvm security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157870 (Oracle Enterprise Linux Security Update for qemu (ELSA-2018-4285)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (103713) and SecurityFocus (BID 100694†). Similar entries are available at VDB-104779, VDB-104780, VDB-105675 and VDB-105918. 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: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
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: 103713
Nessus Name: Debian DLA-1128-1 : qemu-kvm security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 53378
OpenVAS Name: Debian Security Advisory DSA 3991-1 (qemu - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

09/05/2017 🔍
09/06/2017 +1 days 🔍
09/06/2017 +0 days 🔍
09/08/2017 +2 days 🔍
09/08/2017 +0 days 🔍
09/09/2017 +1 days 🔍
10/08/2017 +29 days 🔍
10/09/2017 +1 days 🔍
12/28/2022 +1906 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: RHSA-2017:3368
Researcher: Thomas Garnier
Status: Confirmed

CVE: CVE-2017-14167 (🔍)
GCVE (CVE): GCVE-0-2017-14167
GCVE (VulDB): GCVE-100-106300

OVAL: 🔍

SecurityFocus: 100694

See also: 🔍

Entryinfo

Created: 09/09/2017 20:27
Updated: 12/28/2022 09:17
Changes: 09/09/2017 20:27 (69), 11/14/2019 09:38 (9), 01/11/2021 13:48 (4), 12/28/2022 09:17 (3)
Complete: 🔍
Cache ID: 216::103

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