QEMU up to 5.1.0 hw/pci/pci.c pci_change_irq_level null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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3.3$0-$5k0.00

Summaryinfo

A vulnerability was found in QEMU up to 5.1.0. It has been declared as problematic. This vulnerability affects the function pci_change_irq_level of the file hw/pci/pci.c. Such manipulation leads to null pointer dereference. This vulnerability is listed as CVE-2020-25742. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in QEMU up to 5.1.0 (Virtualization Software). Affected by this issue is the function pci_change_irq_level of the file hw/pci/pci.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability.

The weakness was presented 10/07/2020. The advisory is shared for download at openwall.com. This vulnerability is handled as CVE-2020-25742. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 232083 (Linux Distros Unpatched Vulnerability : CVE-2020-25742), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.1.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (232083). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.4
VulDB Meta Temp Score: 3.3

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.2
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 232083
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2020-25742

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: QEMU 5.1.1

Timelineinfo

09/18/2020 🔍
10/07/2020 +19 days 🔍
10/07/2020 +0 days 🔍
03/07/2025 +1612 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: openwall.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2020-25742 (🔍)
GCVE (CVE): GCVE-0-2020-25742
GCVE (VulDB): GCVE-100-162308

Entryinfo

Created: 10/07/2020 07:22
Updated: 03/07/2025 09:10
Changes: 10/07/2020 07:22 (12), 10/07/2020 07:23 (26), 10/07/2020 07:28 (3), 11/15/2020 10:21 (7), 11/16/2020 20:01 (3), 11/16/2020 20:06 (14), 03/07/2025 09:10 (18)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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