RHEL 6 : kernel-rt (RHSA-2015:0751)

critical Nessus Plugin ID 82467

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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-2015:0751 advisory.

The kernel-rt packages contain the Linux kernel, the core of any Linux operating system.

* It was found that the Linux kernel's Infiniband subsystem did not properly sanitize input parameters while registering memory regions from user space via the (u)verbs API. A local user with access to a /dev/infiniband/uverbsX device could use this flaw to crash the system or, potentially, escalate their privileges on the system. (CVE-2014-8159, Important)

* A use-after-free flaw was found in the way the Linux kernel's SCTP implementation handled authentication key reference counting during INIT collisions. A remote attacker could use this flaw to crash the system or, potentially, escalate their privileges on the system. (CVE-2015-1421, Important)

Red Hat would like to thank Mellanox for reporting the CVE-2014-8159 issue.
The CVE-2015-1421 issue was discovered by Sun Baoliang of Red Hat.

The MRG-Realtime 3.10 kernel-rt sources have been updated to include the following bug fixes:

* The kdump service could become unresponsive due to a deadlock in the kernel call ioapic_lock.

* Attempt to make metadata changes such as creating a thin device or snapshot thin device did not error out cleanly.

(BZ#1201384)

This update also fixes the following bug:

* The MRG kernel scheduler code was missing checks for the PREEMPT_LAZY flag allowing tasks to be preempted more times than necessary causing latency spikes on the system. Additional checks for the PREEMPT_LAZY flag were added to the check_preempt_wakeup() and check_preempt_curr() functions in the scheduler code so that preempt wakeups were reduced and these latency spikes were removed. (BZ#1157949)

All kernel-rt users are advised to upgrade to these updated packages, which 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-2015:0751.

Plugin Details

Severity: Critical

ID: 82467

File Name: redhat-RHSA-2015-0751.nasl

Version: 1.12

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 3/31/2015

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: High

Score: 7.3

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2015-1421

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2014-8159

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 Ease: No known exploits are available

Patch Publication Date: 3/30/2015

Vulnerability Publication Date: 3/16/2015

Reference Information

CVE: CVE-2014-8159, CVE-2015-1421

CWE: 190, 416

RHSA: 2015:0751

Detections

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