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LIN1018-7372 : Security Advisory - linux - CVE-2021-27363

Created: Mar 8, 2021    Updated: Mar 29, 2021
Resolved Date: Mar 23, 2021
Found In Version: 10.18.44.1
Severity: Standard
Applicable for: Wind River Linux LTS 18
Component/s: Kernel

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'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's global variables.

CREATE(Triage):(User=admin) [CVE-2021-27363|https://nvd.nist.gov/vuln/detail/CVE-2021-27363]

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