HyperKit up to 0.20210107 vi_pci_write null pointer dereference

CVSS Meta Temp Score
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A vulnerability was found in HyperKit up to 0.20210107. It has been declared as problematic. This vulnerability affects the function vi_pci_write. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. CVE summarizes:

HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, ` vi_pci_write` has is a call to `vc_cfgwrite` that does not check for null which when called makes the host crash. This issue may lead to a guest crashing the host causing a denial of service. This issue is fixed in commit 451558fe8aaa8b24e02e34106e3bb9fe41d7ad13.

The weakness was released 02/18/2023 as GHSL-2021-054. The advisory is shared for download at securitylab.github.com. This vulnerability was named CVE-2021-32844 since 05/12/2021. There are known technical details, but no exploit is available.

Applying the patch 451558fe8aaa8b24e02e34106e3bb9fe41d7ad13 is able to eliminate this problem. The bugfix is ready for download at github.com.

Entries connected to this vulnerability are available at VDB-221404, VDB-221415 and VDB-221417.

Productinfo

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

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

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 6.2
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

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

Exploitinginfo

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

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 451558fe8aaa8b24e02e34106e3bb9fe41d7ad13

Timelineinfo

05/12/2021 🔍
02/18/2023 +647 days 🔍
02/18/2023 +0 days 🔍
03/18/2023 +28 days 🔍

Sourcesinfo

Advisory: GHSL-2021-054
Status: Confirmed

CVE: CVE-2021-32844 (🔍)
See also: 🔍

Entryinfo

Created: 02/18/2023 08:06 AM
Updated: 03/18/2023 04:19 PM
Changes: 02/18/2023 08:06 AM (51), 03/18/2023 04:19 PM (11)
Complete: 🔍
Cache ID: 98:3BA:40

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