security aspects specific to the Java programming language and libraries.

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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 ...
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169 views

Best way to store a password in a text file

We have a WebLogic server (WLS_APP) with a lot of web applications, we also have an Oracle Service Bus (WLS_OSB) with a lot of services deployed on it. We have these services aggregated in proxy ...
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52 views

Theory behind certificate for job account

I made it work a job account protected by a certificate in a java spring application but is not that clear to me the minimal steps.(Could you believe that :) I need some theory. Here my steps: ...
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1answer
65 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 ...
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1answer
77 views

Code signing certificate validation by Java

Despite several web search, I can’t find an accurate explanation on code signing certificate validation by Java. Indeed, I am wondering if the code signing certificate (the “final cert”) must already ...
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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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1answer
169 views

AES encryption between Java and Ruby: what is the default mode and padding for AES in Java?

I'm writing a ruby app that needs to create some encryption that our java app needs to be able to decrypt. For this I have done some research, and I have this Java code now: Cipher cipher = ...
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1k views

Apache vs Jetty with regard to Security

I am trying to design the architecture of an app that will run on an AWS Linux AMI, inside of a Docker container. The app will deal with sensitive financial data, so security is top priority. The app ...
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2answers
118 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 ...
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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 ...
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2answers
86 views

JAVA (Web Application) Public Data Assigned to Private Array-Typed Field

Referring to this CWE-496, it mentions that because of the application assigning public data to a private array it is equivalent to giving public access to the array. This is not clear to me because ...
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3k views

Is Java secure for the desktop? [duplicate]

The Java plugin for web browsers is known to have many security issues, at least in the past. Google Chrome is not even supporting it any more, describing it as decrepit technology, and Firefox having ...
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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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3answers
941 views

Java SE 8, Update 51 Added “Native Sandbox” Protection for Windows PCs. Wait, what?

So I was doing a little research about differences (if any) between the sandboxing models for Windows 8/8.1 applications and windows 10 applications when I stumbled across something rather ...
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1answer
103 views

MitM Android Java Application

I'm trying to MitM an Android Application for research purposes (it's designed to be broken). I'm using Burp as an attack proxy and already exported the Burp CA certificate and imported it into the ...
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48 views

Apache SSL proxy or Jetty with SSL via keystore to app?

Our team is debating two deployment methods for a RESTful web application. Run the app under http with an embedded Jetty server, but fronted by Apache - Apache would handle the SSL/TLS. Install our ...
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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 ...
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3answers
1k views

Difference between OpenSSL and keytool

I was wondering about differences between using OpenSSl or Keytool and generating certificates by them. I think Keytool is used by Java community but for someone who is not remotely connected to Java ...
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2answers
92 views

Is a precompiled Java program affected by Java vulnerabilities?

We know that Oracle publishes Java updates due to vulnerabilities / security issues and therefore we should make sure that we have installed the latest version of Java. Now there exist programs like ...
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1answer
175 views

Vulnerability of Java software

The JAVA software provided by Oracle is a security mess. But what exactly, in that software package is the most vulnerable. If someone install it and disables the Java plugin in the browser, will he ...
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1answer
241 views

breaking down RSA/ECB/OAEPWITHSHA-256ANDMGF1PADDING

So Java has a mode called RSA/ECB/OAEPWITHSHA-256ANDMGF1PADDING. What does that even mean? RFC3447, Public-Key Cryptography Standards (PKCS) #1: RSA Cryptography Specifications Version 2.1, section ...
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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 ...
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1answer
169 views

Managing/Deploying a code signature certificate - Java Applet

I wonder how to manage/deploy a code signature certificate used by the JVM in a corporate context. Suppose you signed a Java applet (executed in browser by corporate users), how do you deal with the ...
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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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47 views

Java: tokens in memory and garbage collection

I was thinking today about whether this piece of code is secure: String token = <<**token received from REST API call**>> String encryptedToken = Base64.encodeToString(token.getBytes(), ...
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99 views

How to add a certificate chain to a JKS

I want to setup a KeyStore which contains certificate-chains only. This is required by a PKE system which uses the PublicKey of the desired certificate for encryption an then sends the cipher to the ...
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3answers
259 views

Security RESTful web application in Java

We are developing two web applications: Application A : Restful web-services running on a GlassFish Server . Application B : Dynamic web application running on a Tomcat Server . I am accessing ...
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1answer
79 views

Malicious RCE functions in CGI and Java

I know there are some functions in CGI and Java that can be abused to perform remote code execution attack. For example we can see abuse of "eval" function in Movable Type CMS: sub ...
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1answer
173 views

Are there any type safe languages with deterministic compilers?

This article about BIND9 concludes with the statement: The point I'm trying to make here is that BIND9 should not be exposed to the public. It has code problems that should be unacceptable in ...
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458 views

Multiple user type management - token based authentication

I am currently working on an e-commerce application. The application has different users: Customers Merchants Logistics Admin The current db structure has a different table for each of these user ...
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3answers
409 views

Decrypt Java Payload

I found some destructive activity on my JBoss server and after a lot of google searching I found this exploit https://www.exploit-db.com/exploits/36575/ . I know the attacker uses this exploit to ...
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93 views

Verifying Client with Server

I'm currently designing a basic Java program that uses sockets to communicate from a server to multiple clients. I want the clients to be unmodified, however, to prevent against users trying to use ...
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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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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
165 views

Is writing to /dev/null secure?

I am working on a web-service based crypto project in JAVA. The basic idea is for the client to send a SOAP request to a servlet to encrypt data. For data transmission I am using MIME/data-handlers ...
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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 ...
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1answer
643 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 ??
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2answers
1k views

Understanding salted password hashing using Java

Context: I am using this tutorial and trying to understand and implement salted password hashing using Java. After spending some time on this topic, I figured out that the basic idea is to: Convert ...
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87 views

encryption protection against lost password

Here is a plan I am thinking about. I haven't seen this proposed, so I thought I would ask about it. Threat we are guarding against: A lost or stolen laptop leading to exposure of sensitive ...
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80 views

How can I use session salt for encrypting data using AES in CTR mode?

I have to implement a crypto-plugin in Java. The approach followed is conceptually similar to that used for SRTP. The algorithm used for data confidentiality is AES in CTR mode (I'm following a ...
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1answer
1k views

Is it safe to enable SSLv2 ClientHello support?

In the wake of the POODLE attack, many web sites have dropped support for SSLv3. But some clients still in relatively common use as of May 2015 still initiate the handshake with an SSLv2 ClientHello ...
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1answer
166 views

How does Memory Corruption apply to Android?

I have researched several DoS attacks within Android e.g.: CVE-2015-1474 CVE-2013-5933 CVE-2013-4710 CVE-2012-6301 etc. And although I found DoS attacks within Android difficult to understand at ...
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1answer
167 views

What factors make Android app code vulnerable to Cross-Site Request Forgery attacks?

According to techtarget.com Cross-Site Request Forgery is: a method of attacking a Web site in which an intruder masquerades as a legitimate and trusted user. An XSRF attack can be used to ...
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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 ...
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1answer
347 views

What makes an Android application vulnerable to Directory Traversal?

Definition of Directory Traversal Directory traversal is a form of HTTP exploit in which a hacker uses the software on a Web server to access data in a directory other than the server's root ...
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1answer
734 views

What makes an Android application vulnerable to Cross-site scripting (XSS)?

Definition of XSS If you search the web, there are many different ways to define a cross site scripting attack. Simply put, XSS vulnerabilities occur when a malicious attacker is permitted to inject ...
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997 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 ...
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1answer
161 views

How 'Logjam' attack affects openID since it uses Diffie-Hellman key exchange method?

According to the Diffie-Hellman key exchange get affected by logjam, and openID uses this to establish an association. So how this going to affect OpenID?
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How can the Android GraphicBuffer::unflatten() vulnerability (CVE-2015-1474) be exploited remotely?

I've been reading up-on DoS (denial-of-service) attacks within android and although I understand attacks like the below, which make use of regular programming functions etc. (Android Web Browser) ...