RHEL 6 : kernel (RHSA-2012:1064)

medium Nessus Plugin ID 59947

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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 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2012:1064 advisory.

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

This update fixes the following security issues:

* A NULL pointer dereference flaw was found in the nf_ct_frag6_reasm() function in the Linux kernel's netfilter IPv6 connection tracking implementation. A remote attacker could use this flaw to send specially-crafted packets to a target system that is using IPv6 and also has the nf_conntrack_ipv6 kernel module loaded, causing it to crash.
(CVE-2012-2744, Important)

* A flaw was found in the way the Linux kernel's key management facility handled replacement session keyrings on process forks. A local, unprivileged user could use this flaw to cause a denial of service.
(CVE-2012-2745, Moderate)

Red Hat would like to thank an anonymous contributor working with the Beyond Security SecuriTeam Secure Disclosure program for reporting CVE-2012-2744.

This update also fixes the following bugs:

* Previously introduced firmware files required for new Realtek chipsets contained an invalid prefix (rtl_nic_) in the file names, for example /lib/firmware/rtl_nic/rtl_nic_rtl8168d-1.fw. This update corrects these file names. For example, the aforementioned file is now correctly named /lib/firmware/rtl_nic/rtl8168d-1.fw. (BZ#832359)

* This update blacklists the ADMA428M revision of the 2GB ATA Flash Disk device. This is due to data corruption occurring on the said device when the Ultra-DMA 66 transfer mode is used. When the libata.force=5:pio0,6:pio0 kernel parameter is set, the aforementioned device works as expected. (BZ#832363)

* On Red Hat Enterprise Linux 6, mounting an NFS export from a Windows 2012 server failed due to the fact that the Windows server contains support for the minor version 1 (v4.1) of the NFS version 4 protocol only, along with support for versions 2 and 3. The lack of the minor version 0 (v4.0) support caused Red Hat Enterprise Linux 6 clients to fail instead of rolling back to version 3 as expected. This update fixes this bug and mounting an NFS export works as expected. (BZ#832365)

* On ext4 file systems, when fallocate() failed to allocate blocks due to the ENOSPC condition (no space left on device) for a file larger than 4 GB, the size of the file became corrupted and, consequently, caused file system corruption. This was due to a missing cast operator in the ext4_fallocate() function. With this update, the underlying source code has been modified to address this issue, and file system corruption no longer occurs. (BZ#833034)

Users should 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-2012:1064.

Plugin Details

Severity: Medium

ID: 59947

File Name: redhat-RHSA-2012-1064.nasl

Version: 1.25

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 7/11/2012

Updated: 4/15/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2012-2744

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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:U/RL:O/RC:C

CVSS Score Source: CVE-2012-2745

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:kernel, p-cpe:/a:redhat:enterprise_linux:kernel-headers, p-cpe:/a:redhat:enterprise_linux:kernel-firmware, cpe:/o:redhat:enterprise_linux:6, 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: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: 7/10/2012

Vulnerability Publication Date: 8/9/2012

Reference Information

CVE: CVE-2012-2744, CVE-2012-2745

CWE: 476

RHSA: 2012:1064

Detections

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