CVE-2020-9391

Severity CVSS v4.0:

Pending analysis

Type:

CWE-787 Out-of-bounds Write

Publication date:

25/02/2020

Last modified:

07/11/2023

Description

An issue was discovered in the Linux kernel 5.4 and 5.5 through 5.5.6 on the AArch64 architecture. It ignores the top byte in the address passed to the brk system call, potentially moving the memory break downwards when the application expects it to move upwards, aka CID-dcde237319e6. This has been observed to cause heap corruption with the GNU C Library malloc implementation.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vector 2.0

AV:L/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 2.10 LOW
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0

2.10

Severity 2.0

LOW

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.5.6 (including)
cpe:2.3:o:linux:linux_kernel:5.4:::::::*
cpe:2.3:o:fedoraproject:fedora:31:::::::*
cpe:2.3:a:netapp:active_iq_unified_manager:-:::::vmware_vsphere::
cpe:2.3:a:netapp:cloud_backup:-:::::::*
cpe:2.3:a:netapp:data_availability_services:-:::::::*
cpe:2.3:a:netapp:hci_management_node:-:::::::*
cpe:2.3:a:netapp:solidfire:-:::::::*
cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:::::::*
cpe:2.3:o:netapp:h410c_firmware:-:::::::*
cpe:2.3:h:netapp:h410c:-:::::::*

To consult the complete list of CPE names with products and versions, see this page

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.5.6 (including)
cpe:2.3:o:linux:linux_kernel:5.4:::::::*
cpe:2.3:o:fedoraproject:fedora:31:::::::*
cpe:2.3:a:netapp:active_iq_unified_manager:-:::::vmware_vsphere::
cpe:2.3:a:netapp:cloud_backup:-:::::::*
cpe:2.3:a:netapp:data_availability_services:-:::::::*
cpe:2.3:a:netapp:hci_management_node:-:::::::*
cpe:2.3:a:netapp:solidfire:-:::::::*
cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:::::::*
cpe:2.3:o:netapp:h410c_firmware:-:::::::*
cpe:2.3:h:netapp:h410c:-:::::::*

CVE-2020-9391

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools