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Test ID:1.3.6.1.4.1.25623.1.0.871370
Category:Red Hat Local Security Checks
Title:RedHat Update for kexec-tools RHSA-2015:0986-01
Summary:The remote host is missing an update for the 'kexec-tools'; package(s) announced via the referenced advisory.
Description:Summary:
The remote host is missing an update for the 'kexec-tools'
package(s) announced via the referenced advisory.

Vulnerability Insight:
The kexec-tools packages contain the /sbin/kexec binary and utilities that
together form the user-space component of the kernel's kexec feature.
The /sbin/kexec binary facilitates a new kernel to boot using the kernel's
kexec feature either on a normal or a panic reboot. The kexec fastboot
mechanism allows booting a Linux kernel from the context of an already
running kernel.

It was found that the module-setup.sh script provided by kexec-tools
created temporary files in an insecure way. A malicious, local user could
use this flaw to conduct a symbolic link attack, allowing them to overwrite
the contents of arbitrary files. (CVE-2015-0267)

This issue was discovered by Harald Hoyer of Red Hat.

This update also fixes the following bug:

* On Red Hat Enterprise Linux Atomic Host systems, the kdump tool
previously saved kernel crash dumps in the /sysroot/crash file instead of
the /var/crash file. The parsing error that caused this problem has been
fixed, and the kernel crash dumps are now correctly saved in /var/crash.
(BZ#1206464)

In addition, this update adds the following enhancement:

* The makedumpfile command now supports the new sadump format that can
represent more than 16 TB of physical memory space. This allows users of
makedumpfile to read dump files over 16 TB, generated by sadump on certain
upcoming server models. (BZ#1208753)

All kexec-tools users are advised to upgrade to these updated packages,
which contain backported patches to correct these issues and add this
enhancement.

Affected Software/OS:
kexec-tools on Red Hat Enterprise Linux Server (v. 7)

Solution:
Please Install the Updated Packages.

CVSS Score:
3.6

CVSS Vector:
AV:L/AC:L/Au:N/C:N/I:P/A:P

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2015-0267
BugTraq ID: 74622
http://www.securityfocus.com/bid/74622
RedHat Security Advisories: RHSA-2015:0986
http://rhn.redhat.com/errata/RHSA-2015-0986.html
CopyrightCopyright (C) 2015 Greenbone Networks GmbH

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