Tagged Questions

security aspects specific to the Java programming language and libraries.

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1
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0answers
53 views

Should we allow JSPs to change on a running application server?

Should we allow JSPs to change on a running application server on a production system? My gut feeling is no. However, I can't seem to find any information to justify it. From a performance end, ...
1
vote
2answers
83 views

Symmetric encryption involving load balancers - can't randomize key?

I'm working on encrypting a web application's cookie. Using symmetric AES/CBC, I encrypt the cookie data before writing it out, and then decrypt it when reading it back in - the standard stuff. The ...
0
votes
1answer
99 views

Java is running even after it is disabled [closed]

To prevent adds and pop-up that seduce users to install or download viruses I have disabled Java. But I have noticed that even with Java disables Firefox is still running it. The pop-ups are coming ...
10
votes
3answers
2k views

Java SecureRandom doesn't block? How?

I know from experience that reading from /dev/random blocks when the Linux kernel entropy pool runs out of entropy. Also, I've seen many articles and blog entries stating that when running on Linux, ...
10
votes
7answers
813 views

Cheating or service disruption by altering client-side code

A reasonably white-hatted hacker has demonstrated the ability to insert text of his own choosing into the communication between a java applet and a web based server. Not a simple MITM attack, but ...
3
votes
2answers
3k views

Import Public Private key pair to a Keystore

I have created a public private key pair using the KeyPairGenerator class in Java. From this key pair I have generated the CSR request using the PKCS10 class which has been sent to a CA for ...
1
vote
0answers
31 views

Should we protect web application source code from being stolen by web hosts through obfuscation? [duplicate]

Is it worth to obfuscate a java web app source code so that the web host cannot make wrong use of the code & probably even steal your business. If, so how to deal with this or how to obfuscate ? ...
-2
votes
1answer
606 views

ESAPI: Input and output validation [closed]

I am new to IT Security and I have been tasked with coming up with input and output validation for ESAPI. So for input validation, so far I got: Data Type Name Email ...
1
vote
4answers
440 views

Custom programming language, and translator that translate it to Java to make more difficult to get source

I want to make my game extremely hard to decompile. So I've come up with the idea of a program which will contain my game's code, coded in a custom language, and which will translate that code into ...
1
vote
1answer
350 views

Is decryption using Java+JSF safer than using JavaScript?

First off, this is in addition to using SSL! I am building a web application that receives encrypted data from a server. The data is to be decrypted client-side. I've read enough posts here to see ...
1
vote
1answer
227 views

NTRU java attack implementation

I'm researching NTRU cryptosystem and started research based on source code from sourceforge and bouncy castle(java language). Currently I'm reseacrhing attacks on NTRU, based on CVP and SVP. But I'd ...
3
votes
2answers
247 views

How to intercept url to disallow Forced Browsing in simple Dynamic Web Project?

I found an issue related to Forced Browsing in my web-application.And I was able to verify that my static content(like text document...mainly help documents) can be accessed by simply hitting the URL ...
2
votes
1answer
251 views

Taking root ownership

Just gonna make this clear first, this is for class! I have an assignment that requires to 1) modify a web server written in Java to accept file uploads and to use this to deface the homepage (did ...
3
votes
3answers
370 views

Understanding JVM zero day in relationship with other runtimes

I am a .net and php developer and since java has been in the news recently thanks to the string of zero days, I decided to brush up on security. In regards to the java zero days, this question has ...
-4
votes
1answer
561 views

Protect java WEB application inside the server(against reverse engineering) [closed]

I have a web application running on Glassfish 3.1.2 servlet container and I need a way to protect the compiled java classes. I have tried to obfuscate the source code but it didn't work. The project ...
5
votes
1answer
422 views

POC of a Java exploit using leftover JREs

Summary: I would like to show a proof of concept of a Java exploit using an old JRE on an up-to-date machine to cut short discussions on the "but we are patched so why removing older versions" ...
0
votes
1answer
675 views

What triggers a firewall to block a TCP socket?

I was wondering what would cause a firewall to block a TCP Java socket from connecting. What would trigger that?
1
vote
1answer
138 views

AppEngine Sandbox

Does anyone know how the AppEngine sandbox is implemented? I heard they use a SecurityManager with Java but surely they are using another layer as well like LXC. I've looked at the whitelist and there ...
3
votes
2answers
2k views

security implications of Java's System.load vs System.loadLibrary

Jumping from http://stackoverflow.com/questions/7016391/difference-between-system-load-and-system-loadlibrary-in-java What are the security implications of both approach ? ...
4
votes
2answers
235 views

Security of viewing a website containing Java applets offline

I've been wondering whether viewing a website offline increases the security risk. The reason why I'm asking is that having been a short time java applet developer (for a small task) I've come to ...
2
votes
4answers
515 views

How to identify the Java program that is maliciously accessing my web site from many client addresses?

For many years, my personal web site receives numerous pairs of hits that look like this, every day: 202.xx.xx.xx - - [22/Apr/2013:12:02:26 +0000] "GET / HTTP/1.1" 200 5923 "-" "Java/1.4.1_04" ...
3
votes
1answer
144 views

Is there any public information on audited Java open source projects?

I'm sure that there must have been any number of audits on common Java open source projects, many of them for governments or publicly-funded bodies. Have any of the results been made public, so that ...
7
votes
3answers
287 views

How can I circumvent the lack of Java updates?

Just imagine you have a bunch of computers which need Java for some important software and you can't just switch to another vendor because all are using Java in this field of technology. If you start ...
1
vote
1answer
968 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: ...
1
vote
1answer
102 views

Java applet authenticity problem

I implemented an applet in java to authenticate users at my website by the usage of MIFARE cards and everything is working good. However I am concerned about the applet's authenticity, in other words, ...
2
votes
5answers
2k views

Website vulnerability scanner in Java && Open Source

I am working on a Web platform that must-need-should have a good level of security. Therefore, I am interested in a good quality tool to test my Web platform QA on security. My main programming ...
4
votes
2answers
930 views

JInitiator is obsolete and I should reject it on grounds of security, right?

I'm getting a lot of flack and resistance from developers for not allowing a large (200+ users) roll-out of Oracle's JInitiator (http://www.oracle.com/technetwork/testcontent/jinit-084453.html) as ...
5
votes
3answers
827 views

Security of JVM for Server

Using type- and memory-safe languages like Java and Scala for server applications gave me the confidence of having a basic level of security (e.g. compared to C). Now with the recent wave of Oracle ...
3
votes
1answer
1k views

Are any Java Card 3.0 smart cards available?

The Java Card 3.0 specification (draft?) came out in 2008. It is now 2013. Are there any existing smart cards that actually implement the specification? How about USB tokens? The best I've found is ...
3
votes
1answer
1k views

What is the best practice for storing a secret on the cloud?

This post on Securing Java Application Data for Cloud Computing offers a good introduction to using a Java KeyStore for securing encrypted data in the cloud. It neglects, however, to answer the ...
6
votes
3answers
603 views

Why must all classes' data members be set to private?

In OO programming courses, teachers always tells us to set class members to private unless there is a good reason because it is more "secured". How does setting members to private makes the program ...
3
votes
2answers
324 views

Securing Java web services called by web site in DMZ using web services for communication

Suppose you have an application running Java web services in Apache Axis 2. Specifically, these are JAX-WS (Java API for XML-Based Web Services). Currently these web services are on the same Windows ...
1
vote
4answers
177 views

Is there a need to define “language safety”?

Language safety is not clearly defined while there're warnings about for instance Java. So how can you say that language is not safe while language safety is not clearly defined? If Java is unsafe ...
8
votes
2answers
446 views

How to keep using Java 6 securely, despite its unpatch vulnerabilities

Given that Java 6 is now deprecated by Oracle and there recently has been notification of a 0day (that will exist forever now that Oracle is not patching JRE6), what can we do to prevent drive-by ...
-1
votes
1answer
213 views

What are correct steps to setup this exploit execution(jboss_invoke_deploy)?

I've found this vulnerability (http://www.metasploit.com/modules/exploit/multi/http/jboss_invoke_deploy) but can't seem to set proper values for exploit to work , payload shown on site gives me worn ...
0
votes
2answers
887 views

Java SecureRandom generate secure random number

How to generate a secure random number bit length is 256 bits using Java. What is the different between: SecureRandom random = new SecureRandom(); and SecureRandom prng = ...
1
vote
2answers
499 views

What is the safest way to store a password in a single file?

I've been reading about it. This article helped me a lot. But the more I read the more complicated it seems. For example: Is it better to use bcrypt, or PBKDF2, sha2 or something else for the salt? ...
0
votes
1answer
138 views

Did I get hit by the recent Java exploit?

Looks like the website iphonedevsdk was responsible for serving up the malware that's been causing some of the recent security exploits. According to my browser history, I visited that site back in ...
0
votes
1answer
68 views

How esignature verification process work?

I have a web application in which the users will be signing an html report. I know how the digital signature authentication works. But here the user will literally be signing the document (So, Should ...
2
votes
1answer
163 views

Can Jasper files be used as shells to attack java web apps?

JasperReports is an open source Java reporting tool that can write to a variety of targets, such as: screen, a printer, into PDF, HTML, Microsoft Excel, RTF, ODT, Comma-separated values or XML ...
2
votes
1answer
3k views

Where to store Java keystore password?

We are going to have a Java Key Store which will store certificates & public/private keys. This keystore will be protected with the password. However, access to the keystore is only from the ...
3
votes
2answers
321 views

How content-type:image can lead to infected JAR file?

Symantec published a news about a malvertising campaign targeting IE users with Java exploits (already known vulnerabilities). At some point they explain that the users are redirected on malicious ...
3
votes
1answer
473 views

How to debug/reverse engineer java applets?

I need to analyze a java application (a .jar file) for a war game. I know java can be decompiled, but the coder apparently did a lot of obfuscation to prevent the reverse engineers from understanding ...
11
votes
1answer
3k views

Android Runtime Code Injection

I'm doing research for a static analysis tool to help detect malware in Android applications. I'm wondering if it is possible to perform code injection on Android without using a class loader. I ...
4
votes
1answer
283 views

Saved passwords (use case)

I have a program in which a user enters a password, and the user data is stored encrypted using AES-128. The data and passwords must be stored together. Both the data and the password are encrypted ...
0
votes
1answer
428 views

Can Veracode detect vulnerabilities in jsp files?

We have chosen Veracode to perform security assessment of our JavaEE code. We have been performing white-box security testing using Veracode. As I am quite new to Veracode, I was surprised to find no ...
7
votes
3answers
4k views

Reverse engineering and Java

Is java class file or jar file is easy to reverse engineer? Because java generates a class file after compilation and not exe files. Is jar and class files are easy to decompile compare to c# and C++? ...
4
votes
3answers
237 views

jasypt message integrity

I've been looking into ways to encrypt an authentication token that I need to pass from one site to another. Things i have learned so far are use a high level library. don't use ECB use a HMAC to ...
1
vote
2answers
274 views

Do XBAP applications have the same vulnerabilities as Java Web Apps?

In response to the popular decision in disabling Java Web Apps, there has been very little mention of XBAP applications. XBAP applications are similar to Silverlight but it offers more options to ...
3
votes
3answers
657 views

Java 7u11 - Safer to switch to 6?

Java update 7u11 has made some news lately for a couple reasons. Firstly, it was an out-of-band patch to resolve vulnerabilities being exploited in the wild. Then it came back up because it is now ...