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RHEL 7 : kexec-tools (RHSA-2015:0986)

low Nessus Plugin ID 83407

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Synopsis

The remote Red Hat host is missing one or more security updates.

Description

Updated kexec-tools packages that fix one security issue, one bug, and add one enhancement are now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

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.

Solution

Update the affected packages.

See Also

https://access.redhat.com/errata/RHSA-2015:0986

https://access.redhat.com/security/cve/cve-2015-0267

Plugin Details

Severity: Low

ID: 83407

File Name: redhat-RHSA-2015-0986.nasl

Version: 1.14

Type: local

Agent: unix

Published: 5/13/2015

Updated: 2/5/2021

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 3.6

Temporal Score: 3.1

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:kexec-tools, p-cpe:/a:redhat:enterprise_linux:kexec-tools-anaconda-addon, p-cpe:/a:redhat:enterprise_linux:kexec-tools-debuginfo, p-cpe:/a:redhat:enterprise_linux:kexec-tools-eppic, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:7.1, cpe:/o:redhat:enterprise_linux:7.2, cpe:/o:redhat:enterprise_linux:7.3, cpe:/o:redhat:enterprise_linux:7.4, cpe:/o:redhat:enterprise_linux:7.5, cpe:/o:redhat:enterprise_linux:7.6, cpe:/o:redhat:enterprise_linux:7.7

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: 5/12/2015

Vulnerability Publication Date: 5/19/2015

Reference Information

CVE: CVE-2015-0267

BID: 74622

RHSA: 2015:0986