Detections
Analytics
RHEL 7 : kpatch-patch (RHSA-2021:3814)
high Nessus Plugin ID 154070
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Synopsis
The remote Red Hat host is missing one or more security updates for kpatch-patch.Description
The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:3814 advisory.This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel.
Security Fix(es):
* kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543)
* kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)
* kernel: powerpc: KVM guest OS users can cause host OS memory corruption (CVE-2021-37576)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
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 RHEL kpatch-patch package based on the guidance in RHSA-2021:3814.See Also
http://www.nessus.org/u?6dc45d45
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/errata/RHSA-2021:3814
https://bugzilla.redhat.com/show_bug.cgi?id=1965461
Plugin Details
Severity: High
ID: 154070
File Name: redhat-RHSA-2021-3814.nasl
Version: 1.13
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 10/13/2021
Updated: 11/7/2024
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Critical
Score: 9.7
Vendor
Vendor Severity: Important
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 6.3
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2021-37576
CVSS v3
Risk Factor: High
Base Score: 7.8
Temporal Score: 7.5
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:H/RL:O/RC:C
CVSS v4
Risk Factor: High
Base Score: 8.7
Threat Score: 8.7
Threat Vector: CVSS:4.0/E:A
Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L
CVSS Score Source: CVE-2021-22543
Vulnerability Information
CPE: p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_72_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_70_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_66_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_62_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_76_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_61_2, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_80_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_78_2, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_61_1, cpe:/o:redhat:rhel_e4s:7.6, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-957_65_1
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 10/12/2021
Vulnerability Publication Date: 4/20/2021
Exploitable With
CANVAS (CANVAS)
Core Impact
Metasploit (Netfilter x_tables Heap OOB Write Privilege Escalation)