Detections
Analytics
RHEL 8 : kernel-rt (RHSA-2021:5241)
medium Nessus Plugin ID 156248
Language:
Synopsis
The remote Red Hat host is missing a security update for kernel-rt.Description
The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:5241 advisory.- kernel: In Overlayfs missing a check for a negative dentry before calling vfs_rename() (CVE-2021-20321)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the RHEL kernel-rt package based on the guidance in RHSA-2021:5241.See Also
http://www.nessus.org/u?634cf3b2
https://access.redhat.com/security/updates/classification/#moderate
Plugin Details
Severity: Medium
ID: 156248
File Name: redhat-RHSA-2021-5241.nasl
Version: 1.7
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 12/22/2021
Updated: 4/28/2024
Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: Medium
Base Score: 4.7
Temporal Score: 3.5
Vector: CVSS2#AV:L/AC:M/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2021-20321
CVSS v3
Risk Factor: Medium
Base Score: 4.7
Temporal Score: 4.1
Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:kernel-rt, p-cpe:/a:redhat:enterprise_linux:kernel-rt-core, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-core, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-kvm, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-modules, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-modules-extra, p-cpe:/a:redhat:enterprise_linux:kernel-rt-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-kvm, p-cpe:/a:redhat:enterprise_linux:kernel-rt-modules, p-cpe:/a:redhat:enterprise_linux:kernel-rt-modules-extra
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Ease: No known exploits are available
Patch Publication Date: 12/21/2021
Vulnerability Publication Date: 12/21/2021
Reference Information
CVE: CVE-2021-20321