QEMU hw/i386/multiboot.c load_multiboot 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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7.4$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in QEMU. Impacted is the function load_multiboot of the file hw/i386/multiboot.c. The manipulation leads to out-of-bounds. This vulnerability is uniquely identified as CVE-2018-7550. Local access is required to approach this attack. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in QEMU (Virtualization Software) (version now known). This issue affects the function load_multiboot of the file hw/i386/multiboot.c. 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 load_multiboot function in hw/i386/multiboot.c in Quick Emulator (aka QEMU) allows local guest OS users to execute arbitrary code on the QEMU host via a mh_load_end_addr value greater than mh_bss_end_addr, which triggers an out-of-bounds read or write memory access.

The bug was discovered 02/27/2018. The weakness was disclosed 03/01/2018 with CERT (Website). It is possible to read the advisory at securityfocus.com. The identification of this vulnerability is CVE-2018-7550 since 02/27/2018. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

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 108576 (openSUSE Security Update : qemu (openSUSE-2018-291) (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 171522 (OpenSUSE Security Update for qemu (openSUSE-SU-2018:2402-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (108576) and SecurityFocus (BID 103181†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Name

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Website

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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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: 108576
Nessus Name: openSUSE Security Update : qemu (openSUSE-2018-291) (Spectre)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 840783
OpenVAS Name: SuSE Update for qemu openSUSE-SU-2018:0780-1 (qemu)
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

02/27/2018 🔍
02/27/2018 +0 days 🔍
02/27/2018 +0 days 🔍
03/01/2018 +2 days 🔍
03/01/2018 +0 days 🔍
03/02/2018 +1 days 🔍
03/22/2018 +20 days 🔍
03/23/2018 +1 days 🔍
02/16/2023 +1791 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: RHSA-2018:1369⛔
Organization: CERT
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-7550 (🔍)
GCVE (CVE): GCVE-0-2018-7550
GCVE (VulDB): GCVE-100-113987

OVAL: 🔍

SecurityFocus: 103181 - Qemu CVE-2018-7550 Out of Bounds Read and Write Arbitrary Code Execution Vulnerability

Entryinfo

Created: 03/02/2018 07:59
Updated: 02/16/2023 12:56
Changes: 03/02/2018 07:59 (74), 01/09/2020 19:13 (7), 02/16/2023 12:56 (4)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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