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

This script is Copyright (C) 2012-2014 Tenable Network Security, Inc.


Synopsis :

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

Description :

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.
(CVE-2011-3589)

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.

See also :

http://www.nessus.org/u?9bc3c3e8

Solution :

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

Risk factor :

Medium / CVSS Base Score : 5.7
(CVSS2#AV:A/AC:M/Au:N/C:C/I:N/A:N)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 61189 ()

Bugtraq ID:

CVE ID: CVE-2011-3588