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RHEL 7 : kernel (RHSA-2014:1724)
medium Nessus Plugin ID 78722
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Synopsis
The remote Red Hat host is missing one or more security updates for kernel.Description
The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2014:1724 advisory.The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security fixes:
* A race condition flaw was found in the way the Linux kernel's KVM subsystem handled PIT (Programmable Interval Timer) emulation. A guest user who has access to the PIT I/O ports could use this flaw to crash the host.
(CVE-2014-3611, Important)
* A NULL pointer dereference flaw was found in the way the Linux kernel's Stream Control Transmission Protocol (SCTP) implementation handled simultaneous connections between the same hosts. A remote attacker could use this flaw to crash the system. (CVE-2014-5077, Important)
* It was found that the Linux kernel's KVM subsystem did not handle the VM exits gracefully for the invept (Invalidate Translations Derived from EPT) and invvpid (Invalidate Translations Based on VPID) instructions. On hosts with an Intel processor and invept/invppid VM exit support, an unprivileged guest user could use these instructions to crash the guest. (CVE-2014-3645, CVE-2014-3646, Moderate)
* A use-after-free flaw was found in the way the Linux kernel's Advanced Linux Sound Architecture (ALSA) implementation handled user controls. A local, privileged user could use this flaw to crash the system.
(CVE-2014-4653, Moderate)
Red Hat would like to thank Lars Bull of Google for reporting CVE-2014-3611, and the Advanced Threat Research team at Intel Security for reporting CVE-2014-3645 and CVE-2014-3646.
Bug fixes:
* A known issue that could prevent Chelsio adapters using the cxgb4 driver from being initialized on IBM POWER8 systems has been fixed. These adapters can now be used on IBM POWER8 systems as expected. (BZ#1130548)
* When bringing a hot-added CPU online, the kernel did not initialize a CPU mask properly, which could result in a kernel panic. This update corrects the bug by ensuring that the CPU mask is properly initialized and the correct NUMA node selected. (BZ#1134715)
* The kernel could fail to bring a CPU online if the hardware supported both, the acpi-cpufreq and intel_pstate modules. This update ensures that the acpi-cpufreq module is not loaded in the intel_pstate module is loaded. (BZ#1134716)
* Due to a bug in the time accounting of the kernel scheduler, a divide error could occur when hot adding a CPU. To fix this problem, the kernel scheduler time accounting has been reworked. (BZ#1134717)
* The kernel did not handle exceptions caused by an invalid floating point control (FPC) register, resulting in a kernel oops. This problem has been fixed by placing the label to handle these exceptions to the correct place in the code. (BZ#1138733)
* A previous change to the kernel for the PowerPC architecture changed implementation of the compat_sys_sendfile() function. Consequently, the 64-bit sendfile() system call stopped working for files larger than 2 GB on PowerPC. This update restores previous behavior of sendfile() on PowerPC, and it again process files bigger than 2 GB as expected.
(BZ#1139126)
* Previously, the kernel scheduler could schedule a CPU topology update even though the topology did not change. This could negatively affect the CPU load balancing, cause degradation of the system performance, and eventually result in a kernel oops. This problem has been fixed by skipping the CPU topology update if the topology has not actually changed.
(BZ#1140300)
* Previously, recovery of a double-degraded RAID6 array could, under certain circumstances, result in data corruption. This could happen because the md driver was using an optimization that is safe to use only for single-degraded arrays. This update ensures that this optimization is skipped during the recovery of double-degraded RAID6 arrays. (BZ#1143850)
All kernel users are advised to upgrade to these updated packages, which contain backported patches to 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 package based on the guidance in RHSA-2014:1724.See Also
http://www.nessus.org/u?26282ddb
https://access.redhat.com/errata/RHSA-2014:1724
https://access.redhat.com/security/updates/classification/#important
https://bugzilla.redhat.com/show_bug.cgi?id=1113409
https://bugzilla.redhat.com/show_bug.cgi?id=1122982
https://bugzilla.redhat.com/show_bug.cgi?id=1144825
Plugin Details
Severity: Medium
ID: 78722
File Name: redhat-RHSA-2014-1724.nasl
Version: 1.22
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 10/29/2014
Updated: 11/4/2024
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: 4.7
Vendor
Vendor Severity: Important
CVSS v2
Risk Factor: Medium
Base Score: 4.6
Temporal Score: 3.4
Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2014-4653
CVSS v3
Risk Factor: Medium
Base Score: 5.5
Temporal Score: 4.8
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS Score Source: CVE-2014-3646
Vulnerability Information
CPE: p-cpe:/a:redhat:enterprise_linux:kernel-tools, p-cpe:/a:redhat:enterprise_linux:kernel, p-cpe:/a:redhat:enterprise_linux:kernel-headers, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:kernel-tools-libs-devel, p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel, p-cpe:/a:redhat:enterprise_linux:kernel-kdump, p-cpe:/a:redhat:enterprise_linux:kernel-bootwrapper, p-cpe:/a:redhat:enterprise_linux:kernel-tools-libs, p-cpe:/a:redhat:enterprise_linux:python-perf, p-cpe:/a:redhat:enterprise_linux:kernel-kdump-devel, p-cpe:/a:redhat:enterprise_linux:kernel-devel, p-cpe:/a:redhat:enterprise_linux:kernel-debug, p-cpe:/a:redhat:enterprise_linux:perf
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: 10/28/2014
Vulnerability Publication Date: 7/3/2014
Reference Information
CVE: CVE-2014-3611, CVE-2014-3645, CVE-2014-3646, CVE-2014-4653, CVE-2014-5077