Detections
Analytics
CentOS 5 : kernel (CESA-2012:0107)
high Nessus Plugin ID 57922
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Synopsis
The remote CentOS host is missing one or more security updates.Description
Updated kernel packages that fix multiple security issues and two bugs are now available for Red Hat Enterprise Linux 5.The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
The kernel packages contain the Linux kernel, the core of any Linux operating system.
This update fixes the following security issues :
* Using the SG_IO ioctl to issue SCSI requests to partitions or LVM volumes resulted in the requests being passed to the underlying block device. If a privileged user only had access to a single partition or LVM volume, they could use this flaw to bypass those restrictions and gain read and write access (and be able to issue other SCSI commands) to the entire block device. Refer to Red Hat Knowledgebase article DOC-67874, linked to in the References, for further details about this issue. (CVE-2011-4127, Important)
* A flaw was found in the way the Linux kernel handled robust list pointers of user-space held futexes across exec() calls. A local, unprivileged user could use this flaw to cause a denial of service or, eventually, escalate their privileges. (CVE-2012-0028, Important)
* A flaw was found in the Linux kernel in the way splitting two extents in ext4_ext_convert_to_initialized() worked. A local, unprivileged user with the ability to mount and unmount ext4 file systems could use this flaw to cause a denial of service.
(CVE-2011-3638, Moderate)
* A flaw was found in the way the Linux kernel's journal_unmap_buffer() function handled buffer head states. On systems that have an ext4 file system with a journal mounted, a local, unprivileged user could use this flaw to cause a denial of service.
(CVE-2011-4086, Moderate)
* A divide-by-zero flaw was found in the Linux kernel's igmp_heard_query() function. An attacker able to send certain IGMP (Internet Group Management Protocol) packets to a target system could use this flaw to cause a denial of service. (CVE-2012-0207, Moderate)
Red Hat would like to thank Zheng Liu for reporting CVE-2011-3638, and Simon McVittie for reporting CVE-2012-0207.
This update also fixes the following bugs :
* When a host was in recovery mode and a SCSI scan operation was initiated, the scan operation failed and provided no error output.
This bug has been fixed and the SCSI layer now waits for recovery of the host to complete scan operations for devices. (BZ#772162)
* SG_IO ioctls were not implemented correctly in the Red Hat Enterprise Linux 5 virtio-blk driver. Sending an SG_IO ioctl request to a virtio-blk disk caused the sending thread to enter an uninterruptible sleep state ('D' state). With this update, SG_IO ioctls are rejected by the virtio-blk driver: the ioctl system call will simply return an ENOTTY ('Inappropriate ioctl for device') error and the thread will continue normally. (BZ#773322)
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.
Solution
Update the affected kernel packages.See Also
Plugin Details
Severity: High
ID: 57922
File Name: centos_RHSA-2012-0107.nasl
Version: 1.12
Type: local
Agent: unix
Family: CentOS Local Security Checks
Published: 2/14/2012
Updated: 1/4/2021
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 6.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2012-0207
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:centos:centos:kernel-pae, p-cpe:/a:centos:centos:kernel-headers, p-cpe:/a:centos:centos:kernel-debug, p-cpe:/a:centos:centos:kernel-xen, p-cpe:/a:centos:centos:kernel, p-cpe:/a:centos:centos:kernel-doc, p-cpe:/a:centos:centos:kernel-debug-devel, cpe:/o:centos:centos:5, p-cpe:/a:centos:centos:kernel-devel, p-cpe:/a:centos:centos:kernel-pae-devel, p-cpe:/a:centos:centos:kernel-xen-devel
Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 2/9/2012
Vulnerability Publication Date: 5/17/2012
Exploitable With
Core Impact
Reference Information
CVE: CVE-2011-3638, CVE-2011-4086, CVE-2011-4127, CVE-2012-0028, CVE-2012-0207
RHSA: 2012:0107