CVE-2021-27363

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

07/03/2021

Last modified:

23/05/2022

Description

An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport&#39;s handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module&#39;s global variables.

Impact

Vector 3.x

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

Base Score: 4.40 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

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

Base Score 3.x

4.40

Severity 3.x

MEDIUM

Vector 2.0

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

Base Score: 3.60 LOW
Vector: AV:L/AC:L/Au:N/C:P/I:N/A:P

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

Base Score 2.0

3.60

Severity 2.0

LOW

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::		5.11.3 (including)
cpe:2.3:o:debian:debian_linux:9.0:::::::*
cpe:2.3:a:netapp:cloud_backup:-:::::::*
cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:::::::*

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

CVE-2021-27363

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools