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AUSCERT External Security Bulletin Redistribution
Low: ecryptfs-utils security, bug fix, and enhancement update
3 September 2009
AusCERT Security Bulletin Summary
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 5
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Access Privileged Data -- Existing Account
CVE Names: CVE-2008-5188
Comment: This advisory references vulnerabilities in products which run on
platforms other than Red Hat. It is recommended that administrators
running ecryptfs-utils check for an updated version of the software
for their operating system.
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Red Hat Security Advisory
Synopsis: Low: ecryptfs-utils security, bug fix, and enhancement update
Advisory ID: RHSA-2009:1307-02
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2009-1307.html
Issue date: 2009-09-02
CVE Names: CVE-2008-5188
Updated ecryptfs-utils packages that fix a security issue, various bugs,
and add enhancements are now available for Red Hat Enterprise Linux 5.
This update has been rated as having low security impact by the Red Hat
Security Response Team.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
eCryptfs is a stacked, cryptographic file system. It is transparent to the
underlying file system and provides per-file granularity.
eCryptfs is released as a Technology Preview for Red Hat Enterprise Linux
5.4. These updated ecryptfs-utils packages have been upgraded to upstream
version 75, which provides a number of bug fixes and enhancements over the
previous version. In addition, these packages provide a graphical program
to help configure and use eCryptfs. To start this program, run the command:
Important: the syntax of certain eCryptfs mount options has changed. Users
who were previously using the initial Technology Preview release of
ecryptfs-utils are advised to refer to the ecryptfs(7) man page, and to
update any affected mount scripts and /etc/fstab entries for eCryptfs file
A disclosure flaw was found in the way the "ecryptfs-setup-private" script
passed passphrases to the "ecryptfs-wrap-passphrase" and
"ecryptfs-add-passphrase" commands as command line arguments. A local user
could obtain the passphrases of other users who were running the script
from the process listing. (CVE-2008-5188)
These updated packages provide various enhancements, including a mount
helper and supporting libraries to perform key management and mounting
Notable enhancements include:
* a new package, ecryptfs-utils-gui, has been added to this update. This
package depends on the pygtk2 and pygtk2-libglade packages and provides the
eCryptfs Mount Helper GUI program. To install the GUI, first install
ecryptfs-utils and then issue the following command:
yum install ecryptfs-utils-gui
* the "ecryptfs-rewrite-file" utility is now more intelligent when dealing
with non-existent files and with filtering special files such as the "."
directory. In addition, the progress output from "ecryptfs-rewrite-file"
has been improved and is now more explicit about the success status of each
* descriptions of the "verbose" flag and the "verbosity=[x]" option, where
[x] is either 0 or 1, were missing from a number of eCryptfs manual pages,
and have been added. Refer to the eCryptfs man pages for important
information regarding using the verbose and/or verbosity options.
These updated packages also fix the following bugs:
* mounting a directory using the eCryptfs mount helper with an RSA key that
was too small did not allow the eCryptfs mount helper to encrypt the entire
key. When this situation occurred, the mount helper did not display an
error message alerting the user to the fact that the key size was too
small, possibly leading to corrupted files. The eCryptfs mount helper now
refuses RSA keys which are to small to encrypt the eCryptfs key.
* when standard input was redirected from /dev/null or was unavailable,
attempting to mount a directory with the eCryptfs mount helper caused it to
become unresponsive and eventually crash, or an "invalid value" error
message, depending on if the "--verbosity=[value]" option was provided as
an argument, and, if so, its value. With these updated packages, attempting
to mount a directory using "mount.ecryptfs" under the same conditions
results in either the mount helper attempting to use default values (if
"verbosity=0" is supplied), or an "invalid value" error message (instead of
the mount helper hanging) if standard input is redirected and
"--verbosity=1" is supplied, or that option is omitted entirely.
* attempting to use the eCryptfs mount helper with an OpenSSL key when the
keyring did not contain enough space for the key resulted in an unhelpful
error message. The user is now alerted when this situation occurs.
* the eCryptfs mount helper no longer fails upon receiving an incorrect or
empty answer to "yes/no" questions. (BZ#466210)
Users are advised to upgrade to these updated ecryptfs-utils packages,
which resolve these issues and add these enhancements.
Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.
This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
5. Bugs fixed (http://bugzilla.redhat.com/):
460496 - ecryptfs complains about a missing module, fails and then loads it
472524 - CVE-2008-5188 ecryptfs-utils: potential provided password disclosure in the process table
475969 - difference between the name of the binary and the name in its usage message
482834 - RHEL5: update ecryptfs-utils to latest
499128 - `man ecryptfs' is wrong on what to write to openssl_passwd_file=XXX
499367 - mount.ecrytfs hangs when used with wrong/missing stdin
500352 - mount helper asks different set questions when the mount options are OK and when are not
500361 - [ecryptfs-add-passphrase] adding key, which is in keyring already, results in error msg
500566 - When kernel does not support filename encryption `ecryptfs-add-passphrase --fnek' should exit with exit code != 0
500623 - Access-Your-Private-Data.desktop file should have an icon associated
500804 - Typo in ecryptfs-rewrite-file(1)
500810 - ecryptfs-insert-wrapped-passphrase-into-keyring fails to add passphrase to keyring if the passphrase is in the keyring already
500813 - ecryptfs-rewrite-file should be more wise when dealing with non-existing/bogus files
500817 - ecryptfs-dot-private is not expected to be executed, remove the "x" permission
500820 - ecryptfs-setup-swap: vol_id: command not found
500824 - Possible missing runtime dependencies for `ecryptfs-setup-swap'
500829 - `ecryptfs-setup-swap' tries to restart service ``cryptdisks'' which is not present in RHEL/Fedora
500850 - [RFE] ecryptfs-manager should ask for password confirmation when creating openssl key
500997 - ecryptfs-utils-gui must require pygtk2-libglade
501275 - Select key bytes: item "default" is bogus
501460 - Error msg from ecryptfs-utils does not reflect reality when adding key to "full" keyring
6. Package List:
Red Hat Enterprise Linux Desktop (v. 5 client):
RHEL Desktop Workstation (v. 5 client):
Red Hat Enterprise Linux (v. 5 server):
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <email@example.com>. More contact
details at https://www.redhat.com/security/team/contact/
Copyright 2009 Red Hat, Inc.
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