QEMU VGA Display Emulator Update out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in QEMU. This issue affects some unknown processing of the component VGA Display Emulator. Performing a manipulation as part of Update results in out-of-bounds. This vulnerability is reported as CVE-2017-13672. The attack requires a local approach. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in QEMU (Virtualization Software) (version now known). This affects some unknown processing of the component VGA Display Emulator. The manipulation as part of a Update leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on availability. The summary by CVE is:

QEMU (aka Quick Emulator), when built with the VGA display emulator support, allows local guest OS privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) via vectors involving display update.

The bug was discovered 08/30/2017. The weakness was disclosed 09/01/2017 (oss-sec). The advisory is shared at openwall.com. This vulnerability is uniquely identified as CVE-2017-13672 since 08/24/2017. An attack has to be approached locally. Required for exploitation is a authentication. Neither technical details nor an exploit are publicly 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 $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 103538 (Virtuozzo 7 : ksm-vz / prl-disp-legacy / prl-disp-service / etc (VZA-2017-087)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Virtuozzo 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 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (103538) and SecurityFocus (BID 100540†). The entries VDB-104779, VDB-104780, VDB-105675 and VDB-105918 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / 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: 103538
Nessus Name: Virtuozzo 7 : ksm-vz / prl-disp-legacy / prl-disp-service / etc (VZA-2017-087)
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

08/24/2017 🔍
08/30/2017 +6 days 🔍
08/30/2017 +0 days 🔍
09/01/2017 +2 days 🔍
09/01/2017 +0 days 🔍
09/02/2017 +1 days 🔍
09/28/2017 +26 days 🔍
09/29/2017 +1 days 🔍
12/27/2022 +1915 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: RHSA-2018:0816
Researcher: David Buchanan
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-13672 (🔍)
GCVE (CVE): GCVE-0-2017-13672
GCVE (VulDB): GCVE-100-106077

OVAL: 🔍

SecurityFocus: 100540 - QEMU 'hw/display/vga.c' Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 09/02/2017 09:48
Updated: 12/27/2022 15:41
Changes: 09/02/2017 09:48 (70), 11/12/2019 17:07 (11), 01/10/2021 15:20 (3), 12/27/2022 15:41 (3)
Complete: 🔍
Cache ID: 216::103

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