vulnerability
Amazon Linux AMI: CVE-2021-27363: Security patch for kernel (ALAS-2021-1487)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:L/AC:L/Au:N/C:P/I:N/A:P) | 2021-03-07 | 2021-03-20 | 2022-10-14 |
Severity
4
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:P)
Published
2021-03-07
Added
2021-03-20
Modified
2022-10-14
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.
Solution
amazon-linux-upgrade-kernel
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