Scientific Linux Security Update : kexec-tools on SL6.x i386/x86_64

Medium Nessus Plugin ID 61189


The remote Scientific Linux host is missing one or more security updates.


Kexec allows for booting a Linux kernel from the context of an already running kernel.

Kdump used the SSH (Secure Shell) 'StrictHostKeyChecking=no' option when dumping to SSH targets, causing the target kdump server's SSH host key not to be checked. This could make it easier for a man-in-the-middle attacker on the local network to impersonate the kdump SSH target server and possibly gain access to sensitive information in the vmcore dumps. (CVE-2011-3588)

mkdumprd created initrd files with world-readable permissions. A local user could possibly use this flaw to gain access to sensitive information, such as the private SSH key used to authenticate to a remote server when kdump was configured to dump to an SSH target.

mkdumprd included unneeded sensitive files (such as all files from the '/root/.ssh/' directory and the host's private SSH keys) in the resulting initrd. This could lead to an information leak when initrd files were previously created with world-readable permissions. Note:
With this update, only the SSH client configuration, known hosts files, and the SSH key configured via the newly introduced sshkey option in '/etc/kdump.conf' are included in the initrd. The default is the key generated when running the 'service kdump propagate' command, '/root/.ssh/kdump_id_rsa'. (CVE-2011-3590)

This update also fixes several bugs and adds various enhancements.

All kexec-tools users should upgrade to this updated package, which contains backported patches to resolve these issues and add these enhancements.


Update the affected kexec-tools and / or kexec-tools-debuginfo packages.

See Also

Plugin Details

Severity: Medium

ID: 61189

File Name: sl_20111206_kexec_tools_on_SL6_x.nasl

Version: $Revision: 1.3 $

Type: local

Agent: unix

Published: 2012/08/01

Modified: 2014/02/19

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 5.7

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

Vulnerability Information

CPE: x-cpe:/o:fermilab:scientific_linux

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list

Patch Publication Date: 2011/12/06

Reference Information

CVE: CVE-2011-3588