SecurityFocus Linux Newsletter #123

SecurityFocus Linux Newsletter #123
-----------------------------------

I. FRONT AND CENTER
     1. Open Source Honeypots, Part Two: Deploying Honeyd in the Wild
     2. IP Spoofing: An Introduction
     3. Iraqi Cyberwar: an Ageless Joke
     4. SecurityFocus DPP Program
II. LINUX VULNERABILITY SUMMARY
     1. SimpleBBS Users.php Insecure File Permissions Vulnerability
     2. Ethereal SOCKS Dissector Format String Vulnerability
     3. Ethereal NTLMSSP Dissector Heap Corruption Vulnerability
     4. MySQL mysqld Privilege Escalation Vulnerability
     5. PHP-Nuke Multiple SQL Injection Vulnerabilities
     6. MySQL Control Center Insecure Default File Permission...
     7. DeleGate HTTP Proxy Robot.TXT User-Agent: Buffer Overflow...
     8. Multiple PHP-Nuke Forums/Private_Messages SQL Injection...
     9. SaveMyModem Statusbar_Set_Text Buffer Overflow Vulnerability
     10. Multiple Vendor 802.11b Authentication-Failed DOS...
     11. GreyMatter WebLog Remote Command Execution Vulnerability
     12. Man Program Unsafe Return Value Command Execution Vulnerability
     13. Opera Long Filename Download Buffer Overrun Vulnerability
     14. Qpopper Remote Memory Corruption Vulnerability
III. LINUX FOCUS LIST SUMMARY
     1. Port 113 security (Thread)
     2. Traffic Shaping. (Thread)
     3. SecurityFocus Article Announcement (Thread)
IV. NEW PRODUCTS FOR LINUX PLATFORMS
     1. EverLink SRAC Gateway
     2. iChain
     3. NetOp Remote Control
V.  NEW TOOLS FOR LINUX PLATFORMS
     1. eXtended Allow - Deny list for PAM v0.4
     2. C-Kermit v8.0.208
     3. trafcalc v1.0


I. FRONT AND CENTER
-------------------
1. Open Source Honeypots, Part Two: Deploying Honeyd in the Wild
By Lance Spitzner

This is the second part of a three-part series looking at Honeyd, the
open source honeypot. In this paper we we will deploy Honeyd on the
Internet for one week and watch what happens. The intent is to test
Honeyd by letting real bad guys interact with and attack it. We will then
analyze how the honeypot performed and what it discovered

http://www.securityfocus.com/infocus/1675

2. IP Spoofing: An Introduction
by Matthew Tanase

Criminals have long employed the tactic of masking their true identity,
from disguises to aliases to caller-id blocking. It should come as no
surprise then, that criminals who conduct their nefarious activities on
networks and computers should employ such techniques. IP spoofing is one
of the most common forms of on-line camouflage. In IP spoofing, an
attacker gains unauthorized access to a computer or a network by making
it appear that a malicious message has come from a trusted machine by
spoofing” the IP address of that machine. In this article, we will
examine the concepts of IP spoofing: why it is possible, how it works,
what it is used for and how to defend against it.

http://www.securityfocus.com/infocus/1674

3. Iraqi Cyberwar: an Ageless Joke
By George Smith

Did U.S. infowar commandos smuggle a deadly computer virus into Iraq
inside a printer? Of course not. So why does it keep getting reported?

http://www.securityfocus.com/columnists/147

4. SecurityFocus DPP Program

Attention Universities!! Sign-up now for preferred pricing on the only
global early-warning system for cyber attacks - SecurityFocus DeepSight
Threat Management System.

Click here for more information:
http://www.securityfocus.com/corporate/products/dpsection.shtml


II. BUGTRAQ SUMMARY
-------------------
1. SimpleBBS Users.php Insecure File Permissions Vulnerability
BugTraq ID: 7045
Remote: Yes
Date Published: Mar 07 2003 12:00AM
Relevant URL:
http://www.securityfocus.com/bid/7045
Summary:

SimpleBBS is a freely available, open source PHP Bulletin Board. It is
available for the Unix and Linux operating systems.

SimpleBBS reportedly creates the user database 'users.php' with
world-readable permissions in the SimpleBBS web root. User credentials
are stored in plain text format. As a result anyone who may have access
to the SimpleBBS website may view stored user information contained in
the SimpleBBS user database.

This vulnerability was reported for SimpleBBS 1.0.6. It is not known if
earlier versions are affected by this vulnerability.

2. Ethereal SOCKS Dissector Format String Vulnerability
BugTraq ID: 7049
Remote: Yes
Date Published: Mar 08 2003 12:00AM
Relevant URL:
http://www.securityfocus.com/bid/7049
Summary:

Ethereal is a freely available, open source network traffic analysis
tool. It is maintained by the Ethereal Project and is available for most
Unix and Linux variants as well as Microsoft Windows operating systems.

The Ethereal SOCKS dissector is a mechanism for decoding the SOCKS
protocol. A format string vulnerability has been reported in some
versions of this dissector. The vulnerability exists in the
packet-socks.c source file.

An attacker can exploit this vulnerability by connecting to a vulnerable
SOCKS server and sending malicious format string specifiers to the SOCKS
server. If Ethereal is being used as a security tool to monitor network
packets, it is possible that sensitive memory may be corrupted.

This has been confirmed to result in a denial of service condition.
Additionally, it may be possible to cause Ethereal to execute malicious
attacker-supplied code.

This vulnerability affects Ethereal 0.9.9 and earlier.

3. Ethereal NTLMSSP Dissector Heap Corruption Vulnerability
BugTraq ID: 7050
Remote: Yes
Date Published: Mar 08 2003 12:00AM
Relevant URL:
http://www.securityfocus.com/bid/7050
Summary:

Ethereal is a freely available, open source network traffic analysis
tool. It is maintained by the Ethereal Project and is available for most
Unix and Linux variants as well as Microsoft Windows operating systems.

The NTLMSSP (NTLM Security Support Provider) dissector is a mechanism for
evaluating packets that use the NTLM protocol. A heap corruption
vulnerability has been reported for some versions of the dissector.

The precise technical details of this vulnerability are currently
unknown. This BID will be updated as further information is available.

An attacker may be able to exploit this vulnerability by crafting a
specially formed packet and sending it to a system using the NTLMSSP
dissector or by convincing a victim user to use Ethereal to read a
malformed packet trace file.

Due to the nature of this vulnerability it may be possible for an
attacker to create a situation in which sensitive memory could be
overwritten. If successful this may allow for the execution of arbitrary
code with the privileges of the Ethereal process.

This vulnerability affects Ethereal 0.9.9 and earlier.

4. MySQL mysqld Privilege Escalation Vulnerability
BugTraq ID: 7052
Remote: Yes
Date Published: Mar 08 2003 12:00AM
Relevant URL:
http://www.securityfocus.com/bid/7052
Summary:

MySQL is an open source relational database project. It is available for
the Microsoft Windows, Linux, and Unix operating systems.

A vulnerability has been discovered for MySQL that may allow the mysqld
service to start with elevated privileges.

MySQL uses a series of configuration files to set the privileges of the
service. The configuration files are typically stored in /etc/my.cnf,
DATADIR/my.cnf and ~/.my.cnf. When executed, the mysqld service reads
configuration information from /etc/my.cnf first, then DATADIR/my.cnf and
finally ~/.my.cnf.

An attacker can exploit this vulnerability by creating a DATADIR/my.cnf
that includes the line 'user=root' under the '[mysqld]' option section.
Furthermore, the ~/.my.cnf file must not exist.

When the mysqld service is executed, it will run as the root user instead
of the default user.

This may allow an attacker to obtain elevated privileges on a compromised
system.

This vulnerability was reported for MySQL 3.23.55.

5. PHP-Nuke Multiple SQL Injection Vulnerabilities
BugTraq ID: 7031
Remote: Yes
Date Published: Mar 06 2003 12:00AM
Relevant URL:
http://www.securityfocus.com/bid/7031
Summary:

PHP-Nuke is a web-based portal system. Implemented in PHP, it is
available for a range of systems, including Unix, Linux, and Microsoft
Windows.

Multiple SQL injection vulnerabilities were reported in the
'Members_List' and 'Your_Account' modules of PHP-Nuke.  This is due to
insufficient sanitization of externally supplied data which is used to
construct SQL queries.  This data may be supplied via URI parameters in
requests for certain module functions.  A remote attacker may take
advantage of these issues to inject malicious data into SQL queries,
possibly resulting in modification of query logic.

The consequences may vary depending on the particular database
implementation and the nature of the specific queries.  At the very
least, it is possible to compromise the PHP-Nuke web portal.  SQL
injection also makes it possible, under some circumstances, to exploit
vulnerabilities that may exist in the database implementation.

This BID will be divided into separate BIDs for each distinct issue and
retired when further analysis of these vulnerabilities is complete.

6. MySQL Control Center Insecure Default File Permission Vulnerability
BugTraq ID: 7041
Remote: No
Date Published: Mar 07 2003 12:00AM
Relevant URL:
http://www.securityfocus.com/bid/7041
Summary:

MySQL Control Center (MySQLCC) is a visual administration interface for
MySQL database servers and is available for multiple platforms.

A vulnerability has been discovered in MySQLCC. The problem lies in the
permissions set on various files used by MySQLCC. Specifically,
configuration and connection files used by the application are set
world-readable. This may allow a malicious local user to obtain access to
sensitive information regarding various MySQL configuration settings.

Access to these files may allow an attacker to obtain information
required to carry out further attacks against a target system.

This issue has been addressed in MySQLCC 0.8.9.

7. DeleGate HTTP Proxy Robot.TXT User-Agent: Buffer Overflow Vulnerability
BugTraq ID: 7054
Remote: Yes
Date Published: Mar 10 2003 12:00AM
Relevant URL:
http://www.securityfocus.com/bid/7054
Summary:

DeleGate is an open source proxy server developed by Yutaka Sato.
DeleGate allows for proxying of several application protocols, including
HTTP.  It is available for multiple platforms, including Microsoft
Windows and Unix and Linux variants.

The DeleGate HTTP Proxy component is prone to a remotely exploitable
buffer overflow vulnerability.  This is due to insufficient bounds
checking of User-Agent: fields in remote 'robot.txt' files.  It is
reported that it is possible to trigger this issue by specifying multiple
lines of User-Agent: data in the file, which will cause an internal array
of pointers to be overflowed with attacker-supplied data.  This will
occur when a malicious 'robot.txt' file is retrieved via the proxy.

Successful exploitation may result in execution of malicious code in the
security context of the DeleGate proxy server.

This issue was reported in DeleGate versions 8.3.4 and 8.4.0.  Other
versions may also be affected.

8. Multiple PHP-Nuke Forums/Private_Messages SQL Injection Vulnerabilities
BugTraq ID: 7060
Remote: Yes
Date Published: Mar 10 2003 12:00AM
Relevant URL:
http://www.securityfocus.com/bid/7060
Summary:

PHP-Nuke is a web-based portal system. Implemented in PHP, it is
available for a range of systems, including Unix, Linux, and Microsoft
Windows.

Multiple SQL injection vulnerabilities were reported in the Forums
scripts and 'Private_Messages' module of PHP-Nuke.  This is due to
insufficient sanitization of externally supplied data which is used to
construct SQL queries.  This data may be supplied via URI parameters in
requests for certain functions.  A remote attacker may take advantage of
these issues to inject malicious data into SQL queries, possibly
resulting in modification of query logic.

The consequences may vary depending on the particular database
implementation and the nature of the specific queries.  At the very
least, it is possible to compromise the PHP-Nuke web portal.  SQL
injection also makes it possible, under some circumstances, to exploit
vulnerabilities that may exist in the database implementation.

This BID will be divided into separate BIDs for each distinct issue and
retired when further analysis of these vulnerabilities is complete.

9. SaveMyModem Statusbar_Set_Text Buffer Overflow Vulnerability
BugTraq ID: 7068
Remote: Yes
Date Published: Mar 10 2003 12:00AM
Relevant URL:
http://www.securityfocus.com/bid/7068
Summary:

SaveMyModem is mail filtering software.  It is available for Microsoft
Windows and Unix and Linux platforms.

SaveMyModem is prone to a buffer overflow in the 'statusbar_set_text'
function.  In some instances, this function will be called with
externally supplied data, such as when messages are processed.  The
vulnerable function includes a call to vsnprintf(), specifying a source
buffer that is much larger than the destination buffer.

When the vulnerable function is called with externally supplied data, it
may be possible to corrupt sensitive regions of data.  This may
potentially occur if a message is processed with an excessively long
subject.

Successful exploitation will result in code execution in the context of
the SaveMyModem process.

10. Multiple Vendor 802.11b Authentication-Failed Denial Of Service Vulnerability
BugTraq ID: 7069
Remote: Yes
Date Published: Mar 11 2003 12:00AM
Relevant URL:
http://www.securityfocus.com/bid/7069
Summary:

A vulnerability has been reported in some operating systems that are
capable of handling 802.11b traffic.  This issue has been reported as
affecting Linux and Microsoft Windows operating systems.

Some operating systems do not handle specific types of 802.11b traffic
properly.  Upon receiving maliciously crafted packets, the client driver
may drop all active sessions and fail.  A reboot may be required to
resume normal functionality.

The problem is in the handling of Authentication-Failed packets.  By
sending a Authentication-Failed packet to a host with a reason code of
failed authentication that has previously occurred, a host may react
unpredictably, dropping all sessions, and the client software potentially
failing.  It should be noted that the source and destination MAC
addresses of the Authentication-Failed packets are spoofed to appear as
though their origin is the Wireless Access Point.

The attack is typically performed by sending the packets directly to a
802.11b client.  Therefore, this type of attack will evade network
intrusion detection, and may additionally circumvent WEP.

11. GreyMatter WebLog Remote Command Execution Vulnerability
BugTraq ID: 7055
Remote: Yes
Date Published: Mar 10 2003 12:00AM
Relevant URL:
http://www.securityfocus.com/bid/7055
Summary:

GreyMatter WebLog is an open source weblog software package available for
the Unix and Linux operating systems.

A problem in the software may allow unauthorized access to systems using
the vulnerable software.

It has been reported that a problem in GreyMatter weblog may allow
unauthorized access to systems.  Due to improper sanitization of
untrusted input, it may be possible for a remote user to execute commands
on the local system.

The problem is in the handling of user comments by the weblog software.
Due to improper sanitization of the input passed through the weblog
comments fields, an attacker could potentially insert specially crafted
commands such as <?php system(echo($cmd)) ?>.  This would in turn result
in the execution of these commands with the privileges of the web server
process.

12. Man Program Unsafe Return Value Command Execution Vulnerability
BugTraq ID: 7066
Remote: No
Date Published: Mar 11 2003 12:00AM
Relevant URL:
http://www.securityfocus.com/bid/7066
Summary:

Man is a freely available, open source manual page program.  It is
available mainly for Linux operating systems, though it can be used on
other UNIX operating system variants.

A problem with the program may make it possible to launch local attacks
on users through malicious man pages.

It has been reported that the man program does not properly handle some
types of input.  When a man page is processed that could pose a potential
security risk, the program reacts in a way that may open a window of
opportunity for an attacker to execute arbitrary commands.

The problem is in the value returned by the man program when a
potentially dangerous man page is processed.  The man program returns the
string 'unsafe' which is in turn passed to a system() call.  If a program
located in the user's path was named 'unsafe' the program would be
executed with the privileges of the man program user.

13. Opera Long Filename Download Buffer Overrun Vulnerability
BugTraq ID: 7056
Remote: Yes
Date Published: Mar 10 2003 12:00AM
Relevant URL:
http://www.securityfocus.com/bid/7056
Summary:

Opera is a web browser available for a number of platforms, including
Microsoft Windows, Linux and Unix variants and Apple MacOS.

A vulnerability has been discovered in various versions of Opera on the
Microsoft Windows platform.

When specific types of files are downloaded by Opera, the transfer is
displayed within a 'Download Dialog'. Due to insufficient bounds checking
when processing the requested filename, it may be possible for memory to
be corrupted.

Specifically, when a filename is to be displayed within the 'Download
Dialog' the type of file must be verified. When this occurs, the filename
in question is copied into a static buffer on the stack.

By hosting a downloadable file containing a name of excessive length, it
may be possible for an attacker to overwrite sensitive memory locations
within Opera. Successful exploitation of this issue would result in the
execution of arbitrary attacker-supplied commands.

It should be noted that this issue affects Opera versions 6 and 7 on the
Microsoft Windows platform.

14. Qpopper Remote Memory Corruption Vulnerability
BugTraq ID: 7058
Remote: Yes
Date Published: Mar 10 2003 12:00AM
Relevant URL:
http://www.securityfocus.com/bid/7058
Summary:

Qpopper is a POP3 mail server available for Linux and Unix based systems.
A vulnerability has been discovered when calling the 'mdef' command. The
issue presents itself due to the incorrect assumption of the Qvsnprintf()
function. The function is meant to be a replacement for the C function
vsnprintf() but, unlike the latter function, Qvsnprintf() fails to NULL
terminate buffers.

A memory corruption vulnerability has been discovered in Qpopper when
processing a malicious 'mdef' command, as a result of the lack of NULL
termination by Qvsnprintf(). The vulnerability specifically occurs in the
pop_msg() function when filling the 'message' buffer with a user-supplied
macro name. The pop_msg() function incorrectly assumes that the 'message'
buffer will be null terminated after being filled via the Qvsnprintf()
function. A CRLF sequence and null terminator (CRLF+N) is later appended
to the data which may overwrite memory at a location adjacent to the
buffer.

By exploiting this to overwrite the LSB of a saved frame pointer, it is
possible to influence the program in such a way that attacker-supplied
instructions can be executed.

This vulnerability affects Qpopper versions 4.0.4 and earlier. It should
be noted that the exploitability of this issue is highly dependant on the
memory layout, which will likely be influenced by compiler optimization.


III. LINUX FOCUS LIST SUMMARY
----------------------------
1. Port 113 security (Thread)
Relevant URL:

http://online.securityfocus.com/archive/91/314827

2. Traffic Shaping. (Thread)
Relevant URL:

http://online.securityfocus.com/archive/91/314730

3. SecurityFocus Article Announcement (Thread)
Relevant URL:

http://online.securityfocus.com/archive/91/314566


IV. NEW PRODUCTS FOR LINUX PLATFORMS
------------------------------------
1. EverLink SRAC Gateway
by Anyware Technology
Platforms: N/A
Relevant URL:
http://www.anywareusa.com/products/srac_gateway.htm
Summary:

EverLink SRAC Gateway is a high performance network appliance that
integrates many security technologies into a simple network device.
Operating at the application layer, the Gateway allows enterprises to
build fully secured Virtual Private Network as easy as PLUG AND PLAY. By
incorporating all authentication methods, including PKI and dynamic
password, the Gateway provides the most thorough check of a user's
identity. For those who have installed VPNs, the Gateway provides
enterprises with significant added functionalities and security features
to instantly accommodate mobile users anywhere in the world.

2. iChain
by Novell
Platforms: N/A
Relevant URL:
http://www.novell.com/products/ichain/
Summary:

iChain provides identity-based web security services that control access
to application and network resources across technical and organizational
boundaries, as one Net.

3. NetOp Remote Control
by CrossTec Corporation
Platforms: DOS, Linux, OS/2, Windows 2000, Windows 95/98, Windows CE,
Windows NT, Windows XP
Relevant URL:
http://www.crossteccorp.com/netopremote/index.html
Summary:

With New NetOp Remote Control v7.5 you can easily reach any Windows,
Linux, Sun Solaris or legacy OS/2 and DOS PC from your desktop or even
via any Internet connected PC via our new IE browser Guest. View the
remote PC's screen, control its keyboard and mouse, synchronize files,
inventory its hardware and software, launch applications or chat with
someone at the remote PC -- just as if you were seated at that computer.


V.  NEW TOOLS FOR LINUX PLATFORMS
---------------------------------
eXtended Allow - Deny list for PAM v0.4
by Adrian Ber [email protected]
Relevant URL:
http://www.geocities.com/beradrian/soft/xad/index.html
Platforms: Linux, POSIX
Summary:

XAD is a very easy to configure PAM module. Through a very easy language
you can allow/deny access to users.

2. C-Kermit v8.0.208
by Frank da Cruz
Relevant URL:
http://www.columbia.edu/kermit/ckermit.html
Platforms: AIX, FreeBSD, HP-UX, Linux, MacOS, NetBSD, OpenBSD, SCO,
Solaris, SunOS
Summary:

C-Kermit is a combined serial and network communication software package
offering a consistent, medium-independent, cross-platform approach to
connection establishment, terminal sessions, file transfer, character-set
translation, numeric and alphanumeric paging, and automation of
communication tasks. Recent versions include FTP and HTTP clients as well
as an SSH interface, all of which can be scripted and aware of
character-sets. It supports built-in security methods, including Kerberos
IV, Kerberos V, SSL/TLS, and SRP, FTP protocol features such as MLSD, and
source-code parity with Kermit 95 2.1 for Windows and OS/2.

3. trafcalc v1.0
by cyberny
Relevant URL:
http://trafcalc.sourceforge.net/
Platforms: Linux, POSIX
Summary:

Trafcalc calculates the size of the TCP-payload on a system via packet
capturing and connection tracking at the user level instead of the IP
level.