blob: 87bd3a95217fa16e9e83159108ab3d0f1e34682c [file] [log] [blame]
<?xml version="1.0" encoding="utf-8"?>
<glsa id="200411-22">
<title>Davfs2, lvm-user: Insecure tempfile handling</title>
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.
<product type="ebuild">davfs2</product>
<announced>November 11, 2004</announced>
<revised>November 11, 2004: 01</revised>
<package name="net-fs/davfs2" auto="yes" arch="*">
<unaffected range="ge">0.2.2-r1</unaffected>
<vulnerable range="lt">0.2.2-r1</vulnerable>
<package name="sys-fs/lvm-user" auto="yes" arch="*">
<unaffected range="ge">1.0.7-r2</unaffected>
<vulnerable range="lt">1.0.7-r2</vulnerable>
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.
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 type="normal">
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.
There is no known workaround at this time.
All Davfs2 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-fs/davfs2-0.2.2-r1"</code>
All lvm-user users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-fs/lvm-user-1.0.7-r2"</code>
<uri link="">CAN-2004-0972</uri>
<metadata tag="submitter" timestamp="Wed, 10 Nov 2004 09:15:59 +0000">
<metadata tag="bugReady" timestamp="Thu, 11 Nov 2004 20:29:52 +0000">