Security aspects specific to the Java programming language, libraries, and virtual machine.

learn more… | top users | synonyms

2
votes
2answers
2k 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 ...
1
vote
0answers
92 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 ...
4
votes
3answers
2k 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JInitiator is obsolete and I should reject it on grounds of security, right?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 ...
2
votes
1answer
156 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 ...
0
votes
1answer
199 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 ...
-1
votes
1answer
427 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 ...
2
votes
1answer
166 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?
1
vote
1answer
813 views

SSL communication between a C# Server and an Android Client App

I'm using a C# server and a C# tcp client example I extracted from the MSDN and I have created a self signed certificate using makecert.exe. I have got this to communicate with one another and it ...
6
votes
2answers
1k views

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) ...
2
votes
1answer
10k views

Encrypting string in JavaScript and decryption in Java [closed]

I would like to know if there is any library to do encryption in JavaScript and decryption in Java. I have already tried many APIs, but am not getting the same values in Java. I want public-private ...
2
votes
2answers
549 views

Why is “\000” added to the end of passwords prior to hashing with bcrypt?

I am implementing bcrypt for java as found here. Before the actual hash takes place, line 455 of this implementation takes the raw String password, and transforms it into a byte array like so: ...
20
votes
4answers
8k views

Deleting a Java Object securely

I know that in order to delete a Java object I should use character array instead of String, since I can safely erase (rewrite the character array with other data) its content. This seems not to be ...
2
votes
2answers
148 views

Best way to securely store passwords for local use?

I am writing a Java application who needs three username/password pairs. I would like to add a "remember me" feature, implying I would have to store passwords on the user's computer. Knowing this ...
1
vote
0answers
236 views

Problem in 'underscore.js' “new Function()” when CSP header is set.

In underscore.js, template rendering causes violation of the 'unsafe-eval' property, with CSP error at following line: "render = new Function(settings.variable || 'obj', '_', source);" The solution ...
-2
votes
1answer
163 views

Have java drive bys stopped working? [closed]

I don't hear or read about Java Drive Bys (DBD) these days. Up until last year we were always warned against java drive by threats. What happened? Have they become obsolete these days? Edit: To be ...
2
votes
1answer
60 views

How is composed “public host key and certificates (K_S)” in SSH_MSG_KEX_DH_GEX_REPLY message? (SSH2 key exchange)

I'm trying to implement SSH2 key exchange in Java, and having some difficulties. The RFC4419 states, that: The server responds with: byte SSH_MSG_KEX_DH_GEX_REPLY string server public host ...
0
votes
3answers
6k views

Can you write OS-related virus using high level languages like Python

It is a well known fact that OS-related viruses are commonly written in low level languages like C or C++ which require direct access to the kernel of the CPU , I am just wondering if its possible ...
3
votes
1answer
350 views

Can a Java servlet filter be used to pull out scripts that aren't whitelisted?

I might be asking a similar question to this: Whitelisting DOM elements to defeat XSS But I think my proposed solution is different and I was wondering if I could get the community to comment on ...
1
vote
1answer
830 views

Share and store RSA - public key in java server and vice versa

My requirements are: Requirement 1: Share public key to java server. Steps: Generate public-private keys in iOS app. Store the generated keys in keychain. Send generated public key to java server. ...
0
votes
1answer
279 views

Risks of legacy JRE versions?

Certain business applications or legacy software require running older versions of the Java Runtime Environment on client systems, e.g. JRE6 or 7 rather than or in addition to 8. Assuming that ...
0
votes
1answer
1k views

What is the risk of installing Facebook Video Calling jar file?

I'm trying to talk with somebody on Facebook, but after many Facebook privacy scandals, it's a big question. Secondly on OSX, it's giving me the error that “FacebookVideoCalling_v1.6.jar” can’t be ...
0
votes
1answer
2k views

RSA key sizes v/s public key sizes

I am new to cryptography. I have an api provided by a bank. The banks says that they are using RSA algorithm with 2048 bits. We used this api first to get the public key. Here is the sample public ...
2
votes
4answers
173 views

Is serialisation and HashMaps secure?

I've done some reading in this area and there is very little information about the security of a HashMap. The only article I could find was on IBM's Developer Works site. What hashing function is ...
0
votes
1answer
359 views

Java desktop app vs web service [closed]

I currently have a desktop app written in Java (Swing) which talks to a C-based backend over SSL. I am trying to understand the pros/con from a security perspective to move to a web service model. ...
1
vote
1answer
103 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
vote
1answer
232 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 ...
2
votes
0answers
2k 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). ...
0
votes
1answer
224 views

Signature Based Malware Detection

I am developing software for detecting malware based on signature, in Java. I have researched a lot for the approach to move ahead. I found that the basic idea is to store the existing malware ...
1
vote
3answers
168 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 ...
5
votes
4answers
7k views

Writing malware in java?

To me, it seemed like malware could never be written in java. Those who taught me java said it was "secure" and did not allow "low-level access" like c,c++. But, I discovered that it can be done - ...
1
vote
0answers
127 views

Through signing process with HSM Luna, What device perform the signing?

I'v succesfully configure and test character String signin usign Java and HSM Luna SA through PKCS11. My question is, In wich processor cryptographic operations are perform? In wich way HSM Luna ...
1
vote
1answer
247 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 ...
2
votes
1answer
1k views

Preventing License protection circumvention in Java software

A software (written in Java) by a vendor uses DSA signature to verify that the license information is correct. It achieves this by embedding the public key in the same Java software. Legit license ...
2
votes
1answer
122 views

How to prevent browser from rendering malacious content if request or response is hacked

We are currently working on OWASP security fixes and we identified one attack scenario for which we are trying to figure out a possible solution: User hits a valid HTTPRequest to our application. ...
1
vote
1answer
401 views

Rest WebService with signed requests in Java

I'm currently implementing a rest web service with Spring+Java+Tomcat and a cmd client to access it. The most important requirement is to restrict the usage to authenticated users - encryption isn't ...
4
votes
1answer
977 views

Session fixation in Java

In the process of developing a vulnerable jsp/servlet based application I made an attempt to introduce the session fixation vulnerability. Referring to the documentation I came up with the following ...
2
votes
1answer
269 views

Java org.xmlpull.v1.XmlPullParser and XML External Entity (XXE) Processing Attacks

I'm evaluating the security of an Android application and the application is using the XmlPullParser included with Android. I'm having some difficulty getting any common attacks to work, but I want ...
6
votes
3answers
495 views

How to rate Open Source Libraries?

Is there some kind of automated scanning tool which detects threats in Open Source Java Libraries? I think the OWASP Orizon project tried to build such a tool, but it seems to be inactive for years ...
1
vote
0answers
84 views

Sign java jars for security [closed]

We have an enterprise system that utilizes many in house jars, java applications, to run on a centos 7 linux system. How do I go about achieving the following in order of importance: Only signed ...
10
votes
1answer
2k views

Is Java vulnerable to glibc GHOST Vulnerability in Linux?

I see on our RedHat Linux platform that "java" process has dependency over glibc library: [root@hpproliant1 ~]# ldd /usr/bin/java linux-gate.so.1 => (0xffffe000) libpthread.so.0 => ...
1
vote
2answers
2k views

Understanding Java Security Providers

I'm hoping to use the below issue we came across recently to better understand Java's security providers, ciphers and encryption in general. We got the following error during an SSL Handshake (using ...
0
votes
1answer
128 views

What are the consequences of not upgrading to the latest version of java?

Suppose I need to convince someone to upgrade to the latest SDK version of Java? I have heard there are many security vulnerabilities with old versions of java but can't find anything that concretely ...
2
votes
1answer
400 views

Crackstation “Secure Salted Password” Java example - is it really secure?

I'm making an auth service so I've been looking for some good Java/Groovy implementations of password + salt hashing. I've found this article on crackstation along with a code example and decided to ...
1
vote
1answer
623 views

ShellShock vulnerability and Java Web Applications

I am running a java webapplication ( Spring 3.2 based) on linux hosts. The linux hosts are vulnerable to the ShellShock vulnerability. Can someone exploit this vulnerabiity on my website ?
0
votes
2answers
111 views

Is it possible to run an encrypted java environment?

I've seen that virtual machines in virtualbox or VMware can be encrypted so that no one on the outside can access the disk, ram or CPU cache since the entire hardware is emulated and encrypted too. ...
3
votes
1answer
285 views

How to run multiple session while scanning application through Burp?

While the scanning the application through Burp, I found that if I use multiple threads it is resulting to session errors like (The requested session id appears to be invalid.You may have more than ...
1
vote
2answers
273 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 ...
-1
votes
1answer
698 views

Use openssl key to decrypt file in android/java [closed]

I want to decrypt file encrypted in openssl in java. File is encrypted with private key using openssl and on java side i want to decrypt it using public key. The code: public void testRSA() throws ...
0
votes
1answer
166 views

Drive By Download Without User Interaction

Is Exist any kind of drive by download (in Java maybe) without any user interaction, because when you make a drive by download in java in general a popup appears to ask some permission to the user ...
2
votes
1answer
192 views

Smartcard - main differences between .NET and Java smartcard?

My question focuses on the differences regarding PKCS11 implementation between a .Net and a Java smartcard. More generally, do smartcard use a specific "OS" (or firmware) and only differ in the ...