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Security Advisory Moderate: kexec-tools security, bug fix, and enhancement update

Advisory: RHSA-2011:1532-3
Type: Security Advisory
Severity: Moderate
Issued on: 2011-12-06
Last updated on: 2011-12-06
Affected Products: Red Hat Enterprise Linux Desktop (v. 6)
Red Hat Enterprise Linux HPC Node (v. 6)
Red Hat Enterprise Linux Server (v. 6)
Red Hat Enterprise Linux Workstation (v. 6)
CVEs (cve.mitre.org): CVE-2011-3588
CVE-2011-3589
CVE-2011-3590

Details

An updated kexec-tools package that fixes three security issues, various
bugs, and adds enhancements is now available for Red Hat
Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate
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.

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)

Red Hat would like to thank Kevan Carstensen for reporting these issues.

This update also fixes several bugs and adds various enhancements.
Space precludes documenting all of these changes in this advisory.
Documentation for these bug fixes and enhancements will be available
shortly from the Technical Notes document, linked to in the References
section.

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


Solution

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

Updated packages

Red Hat Enterprise Linux Desktop (v. 6)

SRPMS:
kexec-tools-2.0.0-209.el6.src.rpm
File outdated by:  RHBA-2013:1576
    MD5: 1a6a081077c37dd9fe83662913df2870
SHA-256: 86d3f133c7807daa8e9a68179159021015c80fa387f1b02d2d03706eff96d018
 
IA-32:
kexec-tools-2.0.0-209.el6.i686.rpm
File outdated by:  RHBA-2013:1576
    MD5: a7f86336c0df6d7b1e44a3ab471f4010
SHA-256: bed29b72c7f26d995e364d85c3e4bf474f96414b1562687b754cadc0ab98b130
kexec-tools-debuginfo-2.0.0-209.el6.i686.rpm
File outdated by:  RHBA-2013:1576
    MD5: 0b4d353d469c3cbf6c19ae1150f13a11
SHA-256: 193847a49b4ff9b5013026e785bf0716deb3e1296832d98044a85d6cfcc970ab
 
x86_64:
kexec-tools-2.0.0-209.el6.x86_64.rpm
File outdated by:  RHBA-2013:1576
    MD5: 5892f86082ccaa7bf2f4e22e78e5b42e
SHA-256: 2296b32460d654185f80f45399fa2f01fc7f2e94cef547b670969f43a447005e
kexec-tools-debuginfo-2.0.0-209.el6.x86_64.rpm
File outdated by:  RHBA-2013:1576
    MD5: e54ea8b9b38a87dbbbf2007381cfe9b5
SHA-256: 3fd8e2c22154e33533361bf64db809938382e4b690be14bbdfc2d760f18d4812
 
Red Hat Enterprise Linux HPC Node (v. 6)

SRPMS:
kexec-tools-2.0.0-209.el6.src.rpm
File outdated by:  RHBA-2013:1576
    MD5: 1a6a081077c37dd9fe83662913df2870
SHA-256: 86d3f133c7807daa8e9a68179159021015c80fa387f1b02d2d03706eff96d018
 
x86_64:
kexec-tools-2.0.0-209.el6.x86_64.rpm
File outdated by:  RHBA-2013:1576
    MD5: 5892f86082ccaa7bf2f4e22e78e5b42e
SHA-256: 2296b32460d654185f80f45399fa2f01fc7f2e94cef547b670969f43a447005e
kexec-tools-debuginfo-2.0.0-209.el6.x86_64.rpm
File outdated by:  RHBA-2013:1576
    MD5: e54ea8b9b38a87dbbbf2007381cfe9b5
SHA-256: 3fd8e2c22154e33533361bf64db809938382e4b690be14bbdfc2d760f18d4812
 
Red Hat Enterprise Linux Server (v. 6)

SRPMS:
kexec-tools-2.0.0-209.el6.src.rpm
File outdated by:  RHBA-2013:1576
    MD5: 1a6a081077c37dd9fe83662913df2870
SHA-256: 86d3f133c7807daa8e9a68179159021015c80fa387f1b02d2d03706eff96d018
 
IA-32:
kexec-tools-2.0.0-209.el6.i686.rpm
File outdated by:  RHBA-2013:1576
    MD5: a7f86336c0df6d7b1e44a3ab471f4010
SHA-256: bed29b72c7f26d995e364d85c3e4bf474f96414b1562687b754cadc0ab98b130
kexec-tools-debuginfo-2.0.0-209.el6.i686.rpm
File outdated by:  RHBA-2013:1576
    MD5: 0b4d353d469c3cbf6c19ae1150f13a11
SHA-256: 193847a49b4ff9b5013026e785bf0716deb3e1296832d98044a85d6cfcc970ab
 
PPC:
kexec-tools-2.0.0-209.el6.ppc64.rpm
File outdated by:  RHBA-2013:1576
    MD5: 80681398a7885f7f80f9d3e7ce0080e1
SHA-256: f2b7991722791df530c71fe7ab920ac2dfb574ef09de8af287febe7348c36688
kexec-tools-debuginfo-2.0.0-209.el6.ppc64.rpm
File outdated by:  RHBA-2013:1576
    MD5: 693b697887f15fccfaab714a59f22ee3
SHA-256: 4b4fc87e38b8c5b37fa9bae78e68e4d01abaed08150446e12d255ffbabb9d44b
 
s390x:
kexec-tools-2.0.0-209.el6.s390x.rpm
File outdated by:  RHBA-2013:1576
    MD5: 8a45006adfed55b2219137e90d4618ed
SHA-256: 577200938dd55f7e1bf680e8cfd41f84cda2cfdda3106f9bb22a2ba87bd663e9
kexec-tools-debuginfo-2.0.0-209.el6.s390x.rpm
File outdated by:  RHBA-2013:1576
    MD5: f24da0057192a38f8aa85dab6be9e1f4
SHA-256: 66efc563f7cd2b3cd63a1c97d894e496a672ee3ffd7d8f51db6364c0d67a8c01
 
x86_64:
kexec-tools-2.0.0-209.el6.x86_64.rpm
File outdated by:  RHBA-2013:1576
    MD5: 5892f86082ccaa7bf2f4e22e78e5b42e
SHA-256: 2296b32460d654185f80f45399fa2f01fc7f2e94cef547b670969f43a447005e
kexec-tools-debuginfo-2.0.0-209.el6.x86_64.rpm
File outdated by:  RHBA-2013:1576
    MD5: e54ea8b9b38a87dbbbf2007381cfe9b5
SHA-256: 3fd8e2c22154e33533361bf64db809938382e4b690be14bbdfc2d760f18d4812
 
Red Hat Enterprise Linux Workstation (v. 6)

SRPMS:
kexec-tools-2.0.0-209.el6.src.rpm
File outdated by:  RHBA-2013:1576
    MD5: 1a6a081077c37dd9fe83662913df2870
SHA-256: 86d3f133c7807daa8e9a68179159021015c80fa387f1b02d2d03706eff96d018
 
IA-32:
kexec-tools-2.0.0-209.el6.i686.rpm
File outdated by:  RHBA-2013:1576
    MD5: a7f86336c0df6d7b1e44a3ab471f4010
SHA-256: bed29b72c7f26d995e364d85c3e4bf474f96414b1562687b754cadc0ab98b130
kexec-tools-debuginfo-2.0.0-209.el6.i686.rpm
File outdated by:  RHBA-2013:1576
    MD5: 0b4d353d469c3cbf6c19ae1150f13a11
SHA-256: 193847a49b4ff9b5013026e785bf0716deb3e1296832d98044a85d6cfcc970ab
 
x86_64:
kexec-tools-2.0.0-209.el6.x86_64.rpm
File outdated by:  RHBA-2013:1576
    MD5: 5892f86082ccaa7bf2f4e22e78e5b42e
SHA-256: 2296b32460d654185f80f45399fa2f01fc7f2e94cef547b670969f43a447005e
kexec-tools-debuginfo-2.0.0-209.el6.x86_64.rpm
File outdated by:  RHBA-2013:1576
    MD5: e54ea8b9b38a87dbbbf2007381cfe9b5
SHA-256: 3fd8e2c22154e33533361bf64db809938382e4b690be14bbdfc2d760f18d4812
 
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

681796 - Pass "noefi acpi_rsdp=X" to the second kernel
708503 - fails to build without downstream patches
716439 - CVE-2011-3588 CVE-2011-3589 CVE-2011-3590 kexec-tools: Multiple security flaws by management of kdump core files and ramdisk images
719105 - mkdumprd hang in depsolve_modlist when running kernel is not target kernel
725484 - kexec-tools: x86: Start using nr_cpus=1 instead of maxcpus=1
727892 - kexec-tools: Warn a user to use maxcpus=1 instead of nr_cpus=1 for older kernels
731394 - [kexec-tools] Remove warning when kdump service starts
734528 - kexec-tools: Add memory usage debugging capability in second kernel
739050 - non-fatal <unknown> scriptlet failure in rpm package fence-agents


References



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https://www.redhat.com/security/team/key/#package

The Red Hat security contact is secalert@redhat.com. More contact details at http://www.redhat.com/security/team/contact/