RHSA-2013:1536 - Security Advisory

Topic

Updated libguestfs packages that fix one security issue, several bugs, and
add various enhancements are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team 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.

Description

Libguestfs is a library and set of tools for accessing and modifying guest
disk images.

It was found that guestfish, which enables shell scripting and command line
access to libguestfs, insecurely created the temporary directory used to
store the network socket when started in server mode. A local attacker
could use this flaw to intercept and modify other user's guestfish command,
allowing them to perform arbitrary guestfish actions with the privileges of
a different user, or use this flaw to obtain authentication credentials.
(CVE-2013-4419)

This issue was discovered by Michael Scherer of the Red Hat Regional IT
team.

These updated libguestfs packages include numerous bug fixes and
enhancements. Space precludes documenting all of these changes in this
advisory. Users are directed to the Red Hat Enterprise Linux 6.5 Technical
Notes, linked to in the References, for information on the most significant
of these changes.

All libguestfs users are advised to upgrade to these updated packages,
which contain backported patches to correct 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/site/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64

Fixes

• BZ - 892291 - guestmount: link() incorrectly returns ENOENT, when it should be EXDEV
• BZ - 892834 - guestmount: rename() incorrectly follows symbolic links
• BZ - 908255 - error message didn't translate to user language
• BZ - 909666 - Unexpected non-tail recursion in recv_from_daemon results in stack overflow in very long-running API calls that send progress messages
• BZ - 958183 - Rebase libguestfs in RHEL 6.5
• BZ - 971207 - guestfish aug-init command fails: libguestfs: error: aug_init: Augeas initialization failed
• BZ - 971326 - ntfsresize-opts execute failed when omitted the 'size' option
• BZ - 971664 - Need add some removed commands back into guestfish in RHEL 6.5
• BZ - 972413 - txz-out command produces a bzip2-compressed file (should be xz-compressed)
• BZ - 973425 - lsscsi is not available in 6client
• BZ - 975377 - inspect-get-hostname return unknown for linux guest in rhel6
• BZ - 975572 - virt-sysprep is in the wrong subpackage
• BZ - 975753 - "virt-resize --expand" and "virt-resize --resize" outputs error message for Win2008 32bit OS
• BZ - 975760 - Specifying virtio interface ('iface' parameter) breaks the appliance attach-method - libguestfs hangs
• BZ - 980358 - filesystem-available should return false for xfs in rhel6
• BZ - 980372 - "hivex-commit" should fail with a relative path
• BZ - 980502 - libguestfs is not able to be built with yum cache from multiple repos
• BZ - 983690 - libguestfs double free when kernel link fails during launch
• BZ - 985269 - Can't set acl value for a specified user with 'acl-set-file'
• BZ - 988863 - virt-sysprep --firstboot option writes incorrect "99" (instead of "S99") sysv-init-style start up script
• BZ - 989352 - cap-get-file will return error if the file has not be set capabilities
• BZ - 996039 - guestfish does not work due to conflict of remote and interactive mode
• BZ - 997884 - 9p support should be disabled in libguestfs in RHEL 6
• BZ - 998108 - Let's enable kvmclock in RHEL 6
• BZ - 1000122 - 'sh' command before mount causes daemon to segfault
• BZ - 1016960 - CVE-2013-4419 libguestfs: insecure temporary directory handling for guestfish's network socket

CVEs

• CVE-2013-4419

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.5_Technical_Notes/libguestfs.html#RHSA-2013-1536