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RHEL 6 : kernel-rt (RHSA-2012:1150)
medium Nessus Plugin ID 76645
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Synopsis
The remote Red Hat host is missing one or more security updates for kernel-rt.Description
The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2012:1150 advisory.The kernel-rt packages contain the Linux kernel, the core of any Linux operating system.
This update fixes the following security issues:
* A memory leak flaw was found in the way the Linux kernel's memory subsystem handled resource clean up in the mmap() failure path when the MAP_HUGETLB flag was set. A local, unprivileged user could use this flaw to cause a denial of service. (CVE-2012-2390, Moderate)
* A flaw was found in the way the Linux kernel's Event Poll (epoll) subsystem handled resource clean up when an ELOOP error code was returned.
A local, unprivileged user could use this flaw to cause a denial of service. (CVE-2012-3375, Moderate)
This update also fixes the following bugs:
* The MRG 2.1 realtime kernel lacked support for automatic memory reservation for the kdump kernel, as present in Red Hat Enterprise Linux kernels. Using the parameter crashkernel=auto on the kernel boot command line led to kdump being disabled because no memory was correctly reserved.
Support for crashkernel=auto has been implemented in the 3.0 realtime kernel and now when the crashkernel=auto parameter is specified, machines with more than 4GB of RAM have the amount of memory required by the kdump kernel calculated and reserved. (BZ#820427)
* The current bnx2x driver in the MRG 2.1 realtime kernel had faulty support for the network adapter PCI ID 14e4:168e and did not work correctly. The bnx2x driver was updated to include support for this network adapter. (BZ#839037)
Users should upgrade to these updated packages, which upgrade the kernel-rt kernel to version kernel-rt-3.0.36-rt57, and correct these issues. The system must be rebooted for this update to take effect.
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 kernel-rt package based on the guidance in RHSA-2012:1150.See Also
http://www.nessus.org/u?3b4a5efe
https://access.redhat.com/errata/RHSA-2012:1150
https://access.redhat.com/security/updates/classification/#moderate
Plugin Details
Severity: Medium
ID: 76645
File Name: redhat-RHSA-2012-1150.nasl
Version: 1.17
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 7/22/2014
Updated: 6/3/2024
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
Vendor
Vendor Severity: Moderate
CVSS v2
Risk Factor: Medium
Base Score: 4.9
Temporal Score: 3.8
Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2012-3375
CVSS v3
Risk Factor: Medium
Base Score: 5.5
Temporal Score: 5
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
CVSS Score Source: CVE-2012-2390
Vulnerability Information
CPE: p-cpe:/a:redhat:enterprise_linux:kernel-rt, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-devel, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-vanilla-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-firmware, p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug, p-cpe:/a:redhat:enterprise_linux:kernel-rt-doc, p-cpe:/a:redhat:enterprise_linux:kernel-rt-vanilla
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: 8/8/2012
Vulnerability Publication Date: 6/13/2012
Reference Information
CVE: CVE-2012-2390, CVE-2012-3375