security aspects specific to the Java programming language and libraries.

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2
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1answer
49 views

signature and padding

I use JcaContentSignerBuilder to sign a self-signed certificate but I don't know what the default padding is. My requirement is that I must NOT use PKCS#1.5 padding. The code I use is below - can ...
2
votes
2answers
117 views

Where should a keystore (.jks) be stored in a repository

I've got a question about the best practice in storing a Keystore file (.jks) in source control. This Keystore is called by a stand-alone Java component that retrieves a private key for the purpose of ...
2
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0answers
99 views

Code execution through JSP RFI?

I'm working on improving my understanding of RFI (Remote File Inclusion), especially in JSP apps. I've created a vulnerable application that imports a JSP page from another server to replicate the ...
2
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0answers
74 views

Does the Java version matter when compiling an Android, Amazon, or Blackberry app? (for security reasons)

I need to compile an app that will run on an Android, or Android compatible system (Android, Amazon Fire, or Blackberry). The developer documentation says that JDK 7 is needed, however there are ...
2
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0answers
194 views

How CERT.rsa is interrelated with PackageInfo signatures

I am a newbie in security and cryptography, but I am developing Android applications and now wanna to dive deeper into the Android security mechanisms. I am trying to understand how CERT.rsa (as I ...
2
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1answer
641 views

Extract the content of PKCS7 file in Java

I have a PKCS#7 signature that have the content‐type signed data and it embeds an XML document, and I have to extract the xml document from this PKCS7 file. Anyone know how to do that in java ??
2
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1answer
112 views

REST API - XSS prevention - When and how?

I am currently developing a REST API with Java EE and MySQL, it will feed Data to a Android App. The Data comes from an AngularJS Frontend. So my questions are, when: When do I escape the data? Before ...
2
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0answers
1k views

Java Updates Restrict Unsafe SSL Renegotiation With Active Directory Servers

We have two active directory (AD) hosts, ead01.domain.com and ead02.domain.com; we also have a corresponding service domain, at eadauth.domain.com which round-robins between these AD hosts (via DNS). ...
2
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3answers
388 views

Are there commercially available hardware encryption devices over USB? [closed]

I'm designing a system where some combination of hardware and software (lets call it an appliance...) sends asynchronous secure archival to the cloud. By secure, I mean, AES-256 encrypted, with AES ...
2
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0answers
125 views

Grant permission to read java home from untrusted java code

I'm loading untrusted code at runtime and for this reason I'm also writing a custom SecurityManager. This untrusted code however lazy-loads some JRE classes that I do not want to block. Would it be ...
2
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0answers
137 views

Need a little help with Metasploit and Java? [closed]

I'm a junior programmer and i was asked in my job to test java using metasploit... I followed this detailed environment: ...
2
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1answer
518 views

Security at writing in a folder

I would like to run with Runtime.exec() programs in Java (the programs' code are in C and Java ) - the users are uploading the Java/C code, and my app runs them. The code is saved in a separate folder ...
2
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1answer
94 views

What is the point of signature file in signed JAR/ZIP files

The way JAR signatures (or ZIP for Android) are designed is that they have a manifest file, containing digest for each file in the archive. Then there is a "signature file" that contains digest of ...
1
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4answers
212 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 ...
1
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2answers
660 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? ...
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4answers
609 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 ...
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3answers
1k views

Java vulnerability applicability

On a server running Java, can a JRE vulnerability be exploited even in cases where the named subcomponent is not used by the application? See CVE-2011-3545, for which the vulnerable subcomponent is ...
1
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1answer
178 views

Client vs Server security for business critical application (crossplatform)

We have the option to develop a software either based on Java (but then it is only available for desktop clients using Java SE and can run maybe also as tomcat app can be multithreaded, stable, ...
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3answers
452 views

Java class type parameter vulnerability

In a Java programming book there is a section that details the JVM and memory addresses and location as it pertains to parameters of a class type. As you can see from the console output the initial ...
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4answers
420 views

Protecting Password in Code

I am writing a program in Processing (which is basically java), that (amongst other things) downloads files from a FTP Server. To connect to the Server the program needs the correct FTP-password, ...
1
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1answer
811 views

Best Practices for Storing Digital Certificate

I'm building an application where certain sensitive files need to be digitally signed before being stored in the file system using ASN.1 encoding, so they can be verified against a digital certificate ...
1
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2answers
100 views

Where is my missunderstanding in how digital signatures are used with licence files to allow program to run?

I'm trying to learn how digitally signing a licence file helps prevent piracy. For example say an application only runs if it verifies the date as specified in a licence file has not past. Obviously ...
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2answers
2k views

What algorithm should I use to avoid the error “ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY”?

I got a CA cert by submitting my CSR from GoDaddy, after applying a certificate to my Tomcat web server. When I access my website using Chrome or Mozilla I face the error: ...
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1answer
153 views

DoS and Serialization

I got the following message from Fortify static code analyser. Incorrect serialization and de-serialization can lead to unpredictable behavior and cause denial of service attacks. Can anyone ...
1
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1answer
182 views

keytool -genseckey -alias TDES -keyalg DESede -keysize 128 works within jre/bin folder but not when the keytool.exe is on another location

I would like to create a TDES key with size 128bits and 2KTDES key with 192bits for authentication in a Desfire smart card. Hence I have used the keytool to generate the jceks with the following ...
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1answer
104 views

Any standard tests to prevent hacking? [closed]

I am very new in programming world so my question may sound weird. I am useing selenium to test an application, yesterday one of my colleagues found this issue that if someone enters this: <script ...
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2answers
1k views

Doesn't the same string encrypted with the same key generate the same encrypted value?

This is my page and class to encrypt the string entered and saved in database. Each time, the Key__c is the same, as I take it from custom settings. But when I enter abc and save two times, the ...
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4answers
223 views

How to store passphrase in this situation?

How to store a passphrase with a Java application that periodically needs access to its plaintext form? It is a strange situation, but I am wedged in it. If providing a decent security mechanism is ...
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2answers
1k views

Learning to script tools in Python and general Pen Testing

I want to learn Pen Testing and already know Java and have been learning Python and am fairly comfortable with Python syntax. I also have some knowledge on Linux and TCP/IP. My questions are: How can ...
1
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1answer
119 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, ...
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3answers
109 views

How to store & use sensitive data in Java

I have a several Spring Boot applications that use BCryptPasswordEncoder to encrypt data I'll never need to directly use again - passwords, for example. However, I have quite a bit of sensitive data ...
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2answers
91 views

How to rate or review one Java web Application's security

Is there a way to rate or review the security for a Java web application? Except for web scanner or code audit, does it exist a metric/procedure to evaluate the application's security? Also I have ...
1
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1answer
64 views

Some tags I'm worried about when parsing html doc for xxs

I'm building a web app where users can make post which consist of an html doc. An user can change the document via the dev tool for example. So the document consists of literally any user input. I'm ...
1
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1answer
101 views

Securely hide a directory from the OS using java?

I have a project to do for my master's degree and I need to do a Java app which loads a file (read some attributes and copy the file to a working directory), basically any file, and make the working ...
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2answers
996 views

What makes an Android application vulnerable to SQL Injection?

Definition of SQL Injection SQL injection is a code injection technique, used to attack data-driven applications, in which malicious SQL statements are inserted into an entry field for execution ...
1
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1answer
94 views

Why are unsigned Java applications blocked?

Anyone can purchase a code signing certificate. They are cheap and do not involve much validation. Yet Oracle must have determined that disabling execution of unsigned applications increases security. ...
1
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1answer
169 views

Session Fixation - Is that even an issue here?

Someone stepped up to me calling me out on not assigning a new session-ID on successfull login. Basically i was told: The fact that i use the same cookie (with the same SID) in the login-page as well ...
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3answers
122 views

IDS over HTTPS connection

I am designing an anomaly-based intrusion detection system in java. It basically consists of a sniffer that identifies HTTP header fields and then analyze them according to a previous configured XML ...
1
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1answer
187 views

Simple way to secure a webservice used by mobile clients

I am currently working on a RESTful webservice with Java that is used by mobile devices, namely Android and iOS, using a framework that allows me to abstract from both. I'm adding this information ...
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2answers
249 views

Overkill or appropriate?

I have come across a web application that a company has asked me to rebuild. After all the implementation is said and done I will deploy on a private server, and the database will be on its own ...
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2answers
3k views

What's the best way to authenticate an user using a websocket?

I'm creating a multiplayer game(based in websockets) which runs directly from the browser and which has multiplayer functionality. Each player needs to have his own account(Username and password). ...
1
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1answer
187 views

Reflected file download Scenario

I'm making a Java-based web application that is intentionally vulnerable to Reflected File Download (RDF). White paper is here I read the requirements of reflected file download vulnerability as ...
1
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1answer
138 views

Developer Security Training .NET / JAVA [closed]

Hello my team is tasked to perform security focused training for developers (.NET and JAVA). I have used WebGoat to demonstrate OWASP Top 10 type security vulnerabilities and am looking for a similar ...
1
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1answer
601 views

How does Java connect via SSL to a server without me providing any private/public key for the communication? [duplicate]

I am talking about server side auth only. Does Java create an internal self-signed cert for this communication? AFAIK from TLS protocol, we both need to create a shared secret, which is based on what ...
1
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2answers
179 views

How to avoid log4j output external modification

I had a request to find a solution for making a log file secure from editing from the user (not root user) running the JBoss instance of an application (Linux environment) First idea I had is to use ...
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2answers
830 views

How can I determine the Java version running on a remote server?

Short version How can I determine the Java version a remote server is running if I only have access to the server through port 443? Long version I am validating a pentest run by another group. ...
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3answers
1k views

Client Authentication by certificates in Google APP Engine java

I am writing an application in Google APP Engine java which authenticate the user by its certificate. I have created a self signed certificate using keytool at client side. I also enable the HTTPS ...
1
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1answer
615 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 ...
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2answers
1k 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 = ...
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2answers
496 views

How do I import a PKSC#12 private key into Java 5 (which may require PKCS#7)

I have a newer private key I have to import into an older server. How do I take a newer PKCS12 cert and import it into an older version of java that uses a different format?