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Red Hat Security Advisory 2012-0774-04

Red Hat Security Advisory 2012-0774-04
Posted Jun 20, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-0774-04 - libguestfs is a library for accessing and modifying guest disk images. It was found that editing files with virt-edit left said files in a world-readable state. If an administrator on the host used virt-edit to edit a file inside a guest, the file would be left with world-readable permissions. This could lead to unprivileged guest users accessing files they would otherwise be unable to. 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 6.3 Technical Notes for information on the most significant of these changes.

tags | advisory
systems | linux, redhat
advisories | CVE-2012-2690
SHA-256 | 3c03e868e79d870f5fd7c1ec1e25276d1ae7821980f54507b63d5e89bea9fc32

Red Hat Security Advisory 2012-0774-04

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=====================================================================
Red Hat Security Advisory

Synopsis: Low: libguestfs security, bug fix, and enhancement update
Advisory ID: RHSA-2012:0774-04
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0774.html
Issue date: 2012-06-20
CVE Names: CVE-2012-2690
=====================================================================

1. Summary:

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 low
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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - x86_64
Red Hat Enterprise Linux Workstation (v. 6) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - x86_64

3. Description:

libguestfs is a library for accessing and modifying guest disk images.

It was found that editing files with virt-edit left said files in a
world-readable state (and did not preserve the file owner or
Security-Enhanced Linux context). If an administrator on the host used
virt-edit to edit a file inside a guest, the file would be left with
world-readable permissions. This could lead to unprivileged guest users
accessing files they would otherwise be unable to. (CVE-2012-2690)

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 6.3 Technical
Notes for information on the most significant of these changes.

Users of libguestfs are advised to upgrade to these updated packages, which
fix these issues and add these enhancements.

4. 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/knowledge/articles/11258

5. Bugs fixed (http://bugzilla.redhat.com/):

647174 - RHEL6: virt-clone should remove old udev rules when changing MAC address
679737 - libguestfs: improve error message when zerofree is not available in the appliance
719879 - Rebase libguestfs in RHEL 6.3
729076 - libguestfs confuses Hp_recovery partition with Windows root filesystem
731742 - libguestfs should escape special/non-printing characters in debug output
741183 - [RFE] Write a tool to align the partition(s) in a Windows XP image to a multiple of 8 sectors
760221 - RFE: Support inspection of cciss devices
769359 - virt-resize on RHEL 6 kernel fails to re-read the partition table
785305 - ocaml (bytecode) bindings segfault in 'add_drive_opts'
785668 - aug-defnode: daemon crash
789960 - guestfsd crash when try to mount non-exist disk
790958 - multiprovider build error: RuntimeError: link: /tmp/.guestfs-0/kernel /tmp/.guestfs-0/kernel.10139: File exists
795322 - add_ro should return error if not running in a config state
796520 - [RFE] Prevent user from running some appliance configure commands after appliance boot up
797760 - virt-resize on Windows XP in sysprep state causes "UNMOUNTABLE_BOOT_VOLUME" BSOD
798197 - virt-resize confuses format and output_format variables; using --output-format sets the input format
798980 - Libguestfs live support should be disabled in RHEL 6 packages
799695 - guestfs.h fails to compile with c++ compiler
799798 - set_autosync: this function can only be called in the config state at /usr/share/perl5/vendor_perl/Sys/VirtConvert/GuestfsHandle.pm line 107
801273 - Document for set-pgroup need to be updated
801788 - libguestfs holds open file descriptors when handle is launched
803699 - libguestfs inspection fails on Windows XP: libguestfs: error: hivex: could not locate HKLM\SYSTEM\MountedDevices
807557 - virt-sysprep: wrong params are passed to virt-inspector
807905 - mkfs blocksize option breaks when creating btrfs
809401 - inspection doesn't recognize Fedora 17+ (because of grub2 and UsrMove)
811112 - [RFE][virt-sysprep] hostname can not be changed on rhel system
811117 - [RFE][virt-sysprep] net-hwaddr not removed from "ifcfg-*" files on rhel
811673 - guestfs_last_error not set when qemu fails early during launch
812092 - libguestfs cannot open disk images which are symlinks to files that contain ':' (colon) character
813329 - virt-p2v can not convert physical host on MD device
831117 - CVE-2012-2690 libguestfs: virt-edit creates a new file, when it is used leading to loss of file attributes (permissions, owner, SELinux context etc.)

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/libguestfs-1.16.19-1.el6.src.rpm

x86_64:
libguestfs-1.16.19-1.el6.x86_64.rpm
libguestfs-debuginfo-1.16.19-1.el6.x86_64.rpm
libguestfs-java-1.16.19-1.el6.x86_64.rpm
libguestfs-tools-1.16.19-1.el6.x86_64.rpm
libguestfs-tools-c-1.16.19-1.el6.x86_64.rpm
perl-Sys-Guestfs-1.16.19-1.el6.x86_64.rpm
python-libguestfs-1.16.19-1.el6.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/libguestfs-1.16.19-1.el6.src.rpm

x86_64:
libguestfs-debuginfo-1.16.19-1.el6.x86_64.rpm
libguestfs-devel-1.16.19-1.el6.x86_64.rpm
libguestfs-java-devel-1.16.19-1.el6.x86_64.rpm
libguestfs-javadoc-1.16.19-1.el6.x86_64.rpm
ocaml-libguestfs-1.16.19-1.el6.x86_64.rpm
ocaml-libguestfs-devel-1.16.19-1.el6.x86_64.rpm
ruby-libguestfs-1.16.19-1.el6.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/libguestfs-1.16.19-1.el6.src.rpm

x86_64:
libguestfs-1.16.19-1.el6.x86_64.rpm
libguestfs-debuginfo-1.16.19-1.el6.x86_64.rpm
libguestfs-java-1.16.19-1.el6.x86_64.rpm
libguestfs-tools-1.16.19-1.el6.x86_64.rpm
libguestfs-tools-c-1.16.19-1.el6.x86_64.rpm
perl-Sys-Guestfs-1.16.19-1.el6.x86_64.rpm
python-libguestfs-1.16.19-1.el6.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/libguestfs-1.16.19-1.el6.src.rpm

x86_64:
libguestfs-debuginfo-1.16.19-1.el6.x86_64.rpm
libguestfs-devel-1.16.19-1.el6.x86_64.rpm
libguestfs-java-devel-1.16.19-1.el6.x86_64.rpm
libguestfs-javadoc-1.16.19-1.el6.x86_64.rpm
ocaml-libguestfs-1.16.19-1.el6.x86_64.rpm
ocaml-libguestfs-devel-1.16.19-1.el6.x86_64.rpm
ruby-libguestfs-1.16.19-1.el6.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/libguestfs-1.16.19-1.el6.src.rpm

x86_64:
libguestfs-1.16.19-1.el6.x86_64.rpm
libguestfs-debuginfo-1.16.19-1.el6.x86_64.rpm
libguestfs-java-1.16.19-1.el6.x86_64.rpm
libguestfs-tools-1.16.19-1.el6.x86_64.rpm
libguestfs-tools-c-1.16.19-1.el6.x86_64.rpm
perl-Sys-Guestfs-1.16.19-1.el6.x86_64.rpm
python-libguestfs-1.16.19-1.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/libguestfs-1.16.19-1.el6.src.rpm

x86_64:
libguestfs-debuginfo-1.16.19-1.el6.x86_64.rpm
libguestfs-devel-1.16.19-1.el6.x86_64.rpm
libguestfs-java-devel-1.16.19-1.el6.x86_64.rpm
libguestfs-javadoc-1.16.19-1.el6.x86_64.rpm
ocaml-libguestfs-1.16.19-1.el6.x86_64.rpm
ocaml-libguestfs-devel-1.16.19-1.el6.x86_64.rpm
ruby-libguestfs-1.16.19-1.el6.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/libguestfs-1.16.19-1.el6.src.rpm

x86_64:
libguestfs-1.16.19-1.el6.x86_64.rpm
libguestfs-debuginfo-1.16.19-1.el6.x86_64.rpm
libguestfs-java-1.16.19-1.el6.x86_64.rpm
libguestfs-tools-1.16.19-1.el6.x86_64.rpm
libguestfs-tools-c-1.16.19-1.el6.x86_64.rpm
perl-Sys-Guestfs-1.16.19-1.el6.x86_64.rpm
python-libguestfs-1.16.19-1.el6.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/libguestfs-1.16.19-1.el6.src.rpm

x86_64:
libguestfs-debuginfo-1.16.19-1.el6.x86_64.rpm
libguestfs-devel-1.16.19-1.el6.x86_64.rpm
libguestfs-java-devel-1.16.19-1.el6.x86_64.rpm
libguestfs-javadoc-1.16.19-1.el6.x86_64.rpm
ocaml-libguestfs-1.16.19-1.el6.x86_64.rpm
ocaml-libguestfs-devel-1.16.19-1.el6.x86_64.rpm
ruby-libguestfs-1.16.19-1.el6.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2012-2690.html
https://access.redhat.com/security/updates/classification/#low
https://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/6.3_Technical_Notes/libguestfs.html#RHSA-2012-0774

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2012 Red Hat, Inc.
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