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RHEL 6 : kernel (RHSA-2011:0928)
medium Nessus Plugin ID 55584
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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-2011:0928 advisory.The kernel packages contain the Linux kernel, the core of any Linux operating system.
This update fixes the following security issues:
* It was found that the receive hook in the ipip_init() function in the ipip module, and in the ipgre_init() function in the ip_gre module, could be called before network namespaces setup is complete. If packets were received at the time the ipip or ip_gre module was still being loaded into the kernel, it could cause a denial of service. (CVE-2011-1767, CVE-2011-1768, Moderate)
* It was found that an mmap() call with the MAP_PRIVATE flag on /dev/zero would create transparent hugepages and trigger a certain robustness check.
A local, unprivileged user could use this flaw to cause a denial of service. (CVE-2011-2479, Moderate)
This update also fixes various bugs. Documentation for these bug fixes will be available shortly from the Technical Notes document linked to in the References section.
Users should upgrade to these updated packages, which contain backported patches to resolve these issues, and fix the bugs noted in the Technical Notes. 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-2011:0928.See Also
https://access.redhat.com/security/updates/classification/#moderate
https://bugzilla.redhat.com/show_bug.cgi?id=702303
https://bugzilla.redhat.com/show_bug.cgi?id=711546
https://bugzilla.redhat.com/show_bug.cgi?id=712413
https://bugzilla.redhat.com/show_bug.cgi?id=712414
https://bugzilla.redhat.com/show_bug.cgi?id=713135
https://bugzilla.redhat.com/show_bug.cgi?id=713458
https://bugzilla.redhat.com/show_bug.cgi?id=714190
https://bugzilla.redhat.com/show_bug.cgi?id=714761
http://www.nessus.org/u?d3cda1b4
Plugin Details
Severity: Medium
ID: 55584
File Name: redhat-RHSA-2011-0928.nasl
Version: 1.19
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 7/13/2011
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: 4.4
Vendor
Vendor Severity: Moderate
CVSS v2
Risk Factor: Medium
Base Score: 5.4
Temporal Score: 4.2
Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2011-1768
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-2011-2479
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: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: 7/12/2011
Vulnerability Publication Date: 6/13/2012
Reference Information
CVE: CVE-2011-1767, CVE-2011-1768, CVE-2011-2479
RHSA: 2011:0928