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RHEL 7 : kpatch-patch (RHSA-2019:2945)
high Nessus Plugin ID 129519
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Synopsis
The remote Red Hat host is missing a security update for kpatch-patch.Description
The remote Redhat Enterprise Linux 7 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2019:2945 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):
* If the Wake-up on Wireless LAN functionality is configured in the brcmfmac driver, which only works with Broadcom FullMAC chipsets, a malicious event frame can be constructed to trigger a heap buffer overflow in the brcmf_wowl_nd_results() function. This vulnerability can be exploited by compromised chipsets to compromise the host, or when used in combination with another brcmfmac driver flaw (CVE-2019-9503), can be used remotely. This can result in a remote denial of service (DoS). Due to the nature of the flaw, a remote privilege escalation cannot be fully ruled out. (CVE-2019-9500)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgements, 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 this issue 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-2019:2945.See Also
http://www.nessus.org/u?2ef7fde1
https://access.redhat.com/errata/RHSA-2019:2945
https://access.redhat.com/security/updates/classification/#important
Plugin Details
Severity: High
ID: 129519
File Name: redhat-RHSA-2019-2945.nasl
Version: 1.7
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 10/2/2019
Updated: 11/6/2024
Supported Sensors: Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Agentless Assessment, Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.3
Vendor
Vendor Severity: Important
CVSS v2
Risk Factor: High
Base Score: 7.9
Temporal Score: 6.2
Vector: CVSS2#AV:A/AC:M/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2019-9500
CVSS v3
Risk Factor: High
Base Score: 8.3
Temporal Score: 7.5
Vector: CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:redhat:enterprise_linux:kpatch-patch-3_10_0-1062, cpe:/o:redhat:enterprise_linux:7
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: 10/1/2019
Vulnerability Publication Date: 1/16/2020
Reference Information
CVE: CVE-2019-9500