QEMU vga_draw_text out-of-bounds

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in QEMU. The impacted element is the function vga_draw_text. The manipulation leads to out-of-bounds. This vulnerability is documented as CVE-2018-5683. The attack needs to be performed locally. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in QEMU (Virtualization Software) (the affected version is unknown) and classified as critical. This issue affects the function vga_draw_text. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The vga_draw_text function in Qemu allows local OS guest privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) by leveraging improper memory address validation.

The bug was discovered 01/12/2018. The weakness was released 01/23/2018 by Jiang Xin with Huawei (Website). The advisory is shared at lists.gnu.org. The identification of this vulnerability is CVE-2018-5683 since 01/13/2018. The exploitation is known to be easy. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 11 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 106864 (openSUSE Security Update : xen (openSUSE-2018-169) (Meltdown) (Spectre)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351266 (Amazon Linux Security Advisory for qemu-kvm: ALAS-2018-1034).

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 (106864) and SecurityFocus (BID 102518†). Entries connected to this vulnerability are available at VDB-107605, VDB-112341 and VDB-114412. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.0

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.0
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 106864
Nessus Name: openSUSE Security Update : xen (openSUSE-2018-169) (Meltdown) (Spectre)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 800316
OpenVAS Name: SuSE Update for xen openSUSE-SU-2018:0459-1 (xen)
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

12/25/2017 🔍
01/12/2018 +18 days 🔍
01/13/2018 +1 days 🔍
01/23/2018 +10 days 🔍
01/23/2018 +0 days 🔍
01/24/2018 +1 days 🔍
02/16/2018 +23 days 🔍
02/16/2018 +0 days 🔍
02/02/2023 +1812 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: RHSA-2018:0816
Researcher: Jiang Xin
Organization: Huawei
Status: Confirmed

CVE: CVE-2018-5683 (🔍)
GCVE (CVE): GCVE-0-2018-5683
GCVE (VulDB): GCVE-100-112361

OVAL: 🔍

SecurityFocus: 102518 - QEMU CVE-2018-5683 Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 01/24/2018 08:05
Updated: 02/02/2023 13:51
Changes: 01/24/2018 08:05 (75), 12/27/2019 08:48 (7), 02/02/2023 13:51 (4)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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