Detections
Analytics
OracleVM 3.4 : kernel-uek (OVMSA-2021-0008)
high Nessus Plugin ID 147899
Language:
Synopsis
The remote OracleVM host is missing one or more security updates.Description
The remote OracleVM system is missing necessary patches to address security updates:- 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. (CVE-2021-27363)
- An issue was discovered in the Linux kernel through 5.11.3. drivers/scsi/scsi_transport_iscsi.c is adversely affected by the ability of an unprivileged user to craft Netlink messages. (CVE-2021-27364)
- An issue was discovered in the Linux kernel through 5.11.3. Certain iSCSI data structures do not have appropriate length constraints or checks, and can exceed the PAGE_SIZE value. An unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message. (CVE-2021-27365)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected kernel-uek / kernel-uek-firmware packages.See Also
https://linux.oracle.com/cve/CVE-2021-27363.html
https://linux.oracle.com/cve/CVE-2021-27364.html
Plugin Details
Severity: High
ID: 147899
File Name: oraclevm_OVMSA-2021-0008.nasl
Version: 1.5
Type: local
Family: OracleVM Local Security Checks
Published: 3/19/2021
Updated: 1/9/2024
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: Medium
Base Score: 4.6
Temporal Score: 3.6
Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2021-27365
CVSS v3
Risk Factor: High
Base Score: 7.8
Temporal Score: 7
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:oracle:vm:kernel-uek, cpe:/o:oracle:vm_server:3.4, p-cpe:/a:oracle:vm:kernel-uek-firmware
Required KB Items: Host/local_checks_enabled, Host/OracleVM/release, Host/OracleVM/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 3/18/2021
Vulnerability Publication Date: 3/7/2021