Scientific Linux Security Update : vsftpd on SL5.x i386/x86_64

This script is Copyright (C) 2012 Tenable Network Security, Inc.


Synopsis :

The remote Scientific Linux host is missing a security update.

Description :

A memory leak was discovered in the vsftpd daemon. An attacker who is
able to connect to an FTP service, either as an authenticated or
anonymous user, could cause vsftpd to allocate all available memory if
the 'deny_file' option was enabled in vsftpd.conf. (CVE-2007-5962)

As well, this updated package fixes following bugs :

- a race condition could occur even when the
'lock_upload_files' option is set. When uploading two
files simultaneously, the result was a combination of
the two files. This resulted in uploaded files becoming
corrupted. In these updated packages, uploading two
files simultaneously will result in a file that is
identical to the last uploaded file.

- when the 'userlist_enable' option is used, failed log in
attempts as a result of the user not being in the list
of allowed users, or being in the list of denied users,
will not be logged. In these updated packages, a new
'userlist_log=YES' option can be configured in
vsftpd.conf, which will log failed log in attempts in
these situations.

- vsftpd did not support usernames that started with an
underscore or a period character. Usernames starting
with an underscore or a period are supported in these
updated packages.

- using wildcards in conjunction with the 'ls' command did
not return all the file names it should. For example, if
you FTPed into a directory containing three files -- A1,
A21 and A11 -- and ran the 'ls *1' command, only the
file names A1 and A21 were returned. These updated
packages use greedier code that continues to
speculatively scan for items even after matches have
been found.

- when the 'user_config_dir' option is enabled in
vsftpd.conf, and the user-specific configuration file
did not exist, the following error occurred after a user
entered their password during the log in process :

500 OOPS: reading non-root config file

This has been resolved in this updated package.

See also :

http://www.nessus.org/u?ecc7b517

Solution :

Update the affected vsftpd package.

Risk factor :

High / CVSS Base Score : 7.1
(CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 60409 ()

Bugtraq ID:

CVE ID: CVE-2007-5962