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Test ID:1.3.6.1.4.1.25623.1.0.61301
Category:Red Hat Local Security Checks
Title:RedHat Security Advisory RHSA-2008:0680
Summary:NOSUMMARY
Description:Description:

The remote host is missing updates announced in
advisory RHSA-2008:0680.

vsftpd (Very Secure File Transfer Protocol (FTP) daemon) is a secure FTP
server for Linux and Unix-like systems.

The version of vsftpd as shipped in Red Hat Enterprise Linux 4 when used in
combination with Pluggable Authentication Modules (PAM) had a memory leak
on an invalid authentication attempt. Since vsftpd prior to version 2.0.5
allows any number of invalid attempts on the same connection this memory
leak could lead to an eventual DoS. (CVE-2008-2375)

This update mitigates this security issue by including a backported patch
which terminates a session after a given number of failed log in attempts.
The default number of attempts is 3 and this can be configured using the
max_login_fails directive.

This package also addresses the following bugs:

* when uploading unique files, a bug in vsftpd caused the file to be saved
with a suffix '.1' even when no previous file with that name existed. This
issues is resolved in this package.

* when vsftpd was run through the init script, it was possible for the init
script to print an 'OK' message, even though the vsftpd may not have
started. The init script no longer produces a false verification with this
update.

* vsftpd only supported usernames with a maximum length of 32 characters.
The updated package now supports usernames up to 128 characters long.

* a system flaw meant vsftpd output could become dependent on the timing or
sequence of other events, even when the lock_upload_files option was set.
If a file, filename.ext, was being uploaded and a second transfer of the
file, filename.ext, was started before the first transfer was finished, the
resultant uploaded file was a corrupt concatenation of the latter upload
and the tail of the earlier upload. With this updated package, vsftpd
allows the earlier upload to complete before overwriting with the latter
upload, fixing the issue.

* the 'lock_upload_files' option was not documented in the manual page. A
new manual page describing this option is included in this package.

* vsftpd did not support usernames that started with an underscore or a
period character. These special characters are now allowed at the beginning
of a username.

* when storing a unique file, vsftpd could cause an error for some clients.
This is rectified in this package.

* vsftpd init script was found to not be Linux Standards Base compliant.
This update corrects their exit codes to conform to the standard.

All vsftpd users are advised to upgrade to this updated package, which
resolves these issues.

Solution:
Please note that this update is available via
Red Hat Network. To use Red Hat Network, launch the Red
Hat Update Agent with the following command: up2date

http://rhn.redhat.com/errata/RHSA-2008-0680.html
http://www.redhat.com/security/updates/classification/#moderate

Risk factor : High

CVSS Score:
7.1

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2008-2375
BugTraq ID: 30364
http://www.securityfocus.com/bid/30364
Bugtraq: 20080708 rPSA-2008-0217-1 vsftpd (Google Search)
http://www.securityfocus.com/archive/1/494081/100/0/threaded
http://www.openwall.com/lists/oss-security/2008/06/30/2
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10138
http://www.redhat.com/support/errata/RHSA-2008-0579.html
http://www.redhat.com/support/errata/RHSA-2008-0680.html
http://www.securitytracker.com/id?1020546
http://secunia.com/advisories/31007
http://secunia.com/advisories/31223
http://secunia.com/advisories/32263
http://www.vupen.com/english/advisories/2008/2820
CopyrightCopyright (c) 2008 E-Soft Inc. http://www.securityspace.com

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