Discover Government News

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200411-22
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            https://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: Normal
     Title: Davfs2, lvm-user: Insecure tempfile handling
      Date: November 11, 2004
      Bugs: #68406, #69149
        ID: 200411-22

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
=======
Davfs2 and the lvmcreate_initrd script (included in the lvm-user
package) are both vulnerable to symlink attacks, potentially allowing
a local user to overwrite arbitrary files with the rights of the user
running them.

Background
=========
Davfs2 is a file system driver that allows you to mount a WebDAV server
as a local disk drive. lvm-user is a package providing userland
utilities for LVM (Logical Volume Management) 1.x features.

Affected packages
================
    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  net-fs/davfs2       < 0.2.2-r1                        >= 0.2.2-r1
  2  sys-fs/lvm-user     < 1.0.7-r2                        >= 1.0.7-r2
    -------------------------------------------------------------------
     2 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

Description
==========
Florian Schilhabel from the Gentoo Linux Security Audit Team found that
Davfs2 insecurely created .pid files in /tmp. Furthermore, Trustix
Secure Linux found that the lvmcreate_initrd script, included in the
lvm-user Gentoo package, also creates temporary files in
world-writeable directories with predictable names.

Impact
=====
A local attacker could create symbolic links in the temporary files
directory, pointing to a valid file somewhere on the filesystem. When
Davfs2 or lvmcreate_initrd is called, this would result in the file
being overwritten with the rights of the user running the software,
which could be the root user.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All Davfs2 users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-fs/davfs2-0.2.2-r1"

All lvm-user users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-fs/lvm-user-1.0.7-r2"

References
=========
  [ 1 ] CAN-2004-0972
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0972

Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  https://security.gentoo.org/glsa/200411-22

Concerns?
========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org/.

License
======
Copyright 2004 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.0/

Gentoo: GLSA-200411-22: Davfs2, lvm-user: Insecure tempfile handling

Davfs2 and the lvmcreate_initrd script (included in the lvm-user package) are both vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files wit...

Summary

Gentoo Linux Security Advisory GLSA 200411-22 https://security.gentoo.org/ Severity: Normal Title: Davfs2, lvm-user: Insecure tempfile handling Date: November 11, 2004 Bugs: #68406, #69149 ID: 200411-22

Synopsis ======= Davfs2 and the lvmcreate_initrd script (included in the lvm-user package) are both vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files with the rights of the user running them.
Background ========= Davfs2 is a file system driver that allows you to mount a WebDAV server as a local disk drive. lvm-user is a package providing userland utilities for LVM (Logical Volume Management) 1.x features.
Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-fs/davfs2 < 0.2.2-r1 >= 0.2.2-r1 2 sys-fs/lvm-user < 1.0.7-r2 >= 1.0.7-r2 ------------------------------------------------------------------- 2 affected packages on all of their supported architectures. -------------------------------------------------------------------
========== Florian Schilhabel from the Gentoo Linux Security Audit Team found that Davfs2 insecurely created .pid files in /tmp. Furthermore, Trustix Secure Linux found that the lvmcreate_initrd script, included in the lvm-user Gentoo package, also creates temporary files in world-writeable directories with predictable names.
Impact ===== A local attacker could create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When Davfs2 or lvmcreate_initrd is called, this would result in the file being overwritten with the rights of the user running the software, which could be the root user.
Workaround ========= There is no known workaround at this time.
Resolution ========= All Davfs2 users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-fs/davfs2-0.2.2-r1"
All lvm-user users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=sys-fs/lvm-user-1.0.7-r2"
References ========= [ 1 ] CAN-2004-0972 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0972
Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
https://security.gentoo.org/glsa/200411-22
Concerns? ======== Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org/.
License ====== Copyright 2004 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
https://creativecommons.org/licenses/by-sa/2.0/

Resolution

References

Availability

Concerns

Severity

Synopsis

Background

Affected Packages

Impact

Workaround

Related News