the process of tightening security on a system.

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19
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3answers
4k views

Why doesn't Linux randomize the address of the executable code segment?

I've recently been learning about how ASLR (address space randomization) works on Linux. At least on Fedora and Red Hat Enterprise Linux, there are two kinds of executable programs: Position ...
1
vote
1answer
1k views

Firewall Benchmark, Checklist, Guideline?

I'm doing some research on checklist, benchmark, hardening guidelines. And I couldn't find specific documents for security checklist for firewall. CIS had this document, but it was only for Cisco ...
3
votes
2answers
455 views

Python security hardening

I’m working for a large organization which is using some Windows products that require python to work. Python is used to execute built in utility scripts and the user never recognizes that python is ...
2
votes
0answers
766 views

Using “Security Compliance Manager” to audit a Windows system

I found a few posts which suggest using Microsoft SCM (Security Compliance Manager) to audit the security of Microsoft software solutions: Windows security policy analysis tool How do I apply a ...
5
votes
2answers
1k views

How to securely encrypt data with a public-private key encryption scheme, but also allow decryption if the private key is lost?

This question is a followup question to Storing plaintext passwords for cameras - Security concerns?. In that question, I posed what I thought was a simple question, which actually turned out to ...
10
votes
5answers
2k views

Storing plaintext passwords for cameras - Security concerns?

This question has a follow-up question here: How to securely encrypt data with a public-private key encryption scheme, but also allow decryption if the private key is lost? TL;DR: Can I use ...
5
votes
1answer
259 views

What can be done to bridge the Air Gap, except autorun?

What can be done to bridge the Air Gap, except autorun? Is there any hardware butterflies that can attack physically isolated Unix/Linux machine in common usb drives, like VSC (Vendor Specific ...
2
votes
2answers
1k views

Hardening a perimeter router

What are some of the steps that could be taken to harden a perimeter (internet facing) router from attacks by potentially malicious users?
2
votes
1answer
170 views

Basic Website Protection (XSS,SQL-inject,hashing)

I have a very simple app that does allow unauthenticated users to leave comments (maybe later I will incorporate a capatcha). The app then stores the comments in a mysql db. I do my best to filter out ...
8
votes
5answers
2k views

Fastest way to “lockdown” CentOS and have network intrusion detection, firewall, etc up and running?

Are there any proven concepts or "installers" to get up and running based on the best practices securing and locking down a CentOS installation? I'm hoping for an automated tool that would scan the ...
0
votes
3answers
221 views

Testing Malware in one Virtual Machine which is running side by side along with other Virtual Machines

I want to harden the security of my host system and side by side running virtual machines while testing some files for malware in one of the virtual machines. Here comes a list of questions that I ...
0
votes
1answer
241 views

Joomla Linux Permissions

I installed Joomla 3 to /var/www/html directory in Cent OS 6 server. Currently /var/www/html is owned by apache:apache. What is the recommended permissions for Joomla installation on Linux in ...
4
votes
2answers
544 views

Read-Only Hard Drives

Has anyone come across a 2.5 SSD or HDD that has a physical read-only switch similar to this? Or an enclosure that can render a hard drive read only?
1
vote
2answers
181 views

Segregating Offline Server and Internet Connection in one pc

What I want to do: Setup a PC with two routers. One router is directly connected to the internet, the other is connected to an offline workspace server. My client will be connected to both via a ...
2
votes
3answers
257 views

Is opening a new mysql connection for each query potentially unsafe?

I am doing some unit testing and noticed that if I click (or have multiple people clicking) the same filter very very fast (very precise I know;) eventually I get a "The connection is already open." ...
2
votes
2answers
86 views

Question regarding browser windows when integrating with 3rd party payment software

I've been told that when integrating with a 3rd party payment gateway, the other website's window should not be opened in an iFrame or a separate window - that the current application window itself ...
1
vote
2answers
274 views

Web-based intrusion detection integrating visibility into web app and database

Consider the problem of hardening an existing, database-backed web application, to detect attacks and stop them where possible. It seems like one plausible approach might be to build an intrusion ...
15
votes
5answers
2k views

Securing a laptop against attacks (article)

I came across this article when looking for ways of hardening my laptop, and this guide seemed extremely thorough. It is perhaps overly paranoid, but it will be good to have a guide I can trust should ...
30
votes
20answers
5k views

How can I prevent my kids from bypassing my computer restrictions?

My son has a downloaded copy of Ubuntu that he uses to "break" into my computer, bypassing Vista. I have two questions: Can this damage my computer or corrupt my files? (I have lots of pictures) Is ...
2
votes
2answers
229 views

What's there to harden for a home Unix-box behind Comcast cable modem?

I'm learning that much of the security advice I come across under the "hardening" heading simply does not apply to a single-user home desktop box sitting in a private wireless IPv4 LAN behind a ...
2
votes
1answer
705 views

How to harden a “dedicated” Firefox?

I want to set up an instance of Firefox to be used to access a strictly limited "white list" of websites (my bank's, my credit cards', etc.). How can I harden such an instance of Firefox to reduce ...
2
votes
3answers
280 views

How to setup a dedicated home machine (Linux) for secure transactions?

I would like to set up a computer at home (preferably running Debian, or some other flavor of Linux) to be used only for secure financial transactions. The idea is that, by strictly limiting what is ...
10
votes
3answers
285 views

What is a good source for hardened base configurations

I attended B-Sides in Orlando FL where one of the speakers had mentioned a site which contains hardened configs for popular services such as apache and postfix. The author of these configs is ...
4
votes
2answers
464 views

Heap canaries, to protect function pointers in heap objects

I'm wondering if anyone has previously proposed, evaluated, or deployed the following measure to harden systems against heap-based buffer overruns: basically, stack canaries, but applied before ...
0
votes
1answer
133 views

libraries alternative to gcc stack-protector / fortity source feature on linux

is there external library/approach/whatever to add canary protection (stack-protector equivalent) extra buffer boundary check (fortity source equivalent) on a C software without using glibc / ...
6
votes
2answers
562 views

How often is ASLR randomness refreshed, in Linux?

Most Linux distributions now use ASLR for many programs, to randomize the layout of memory. How often is the randomness used for this changed? If I re-run the same program multiple times, will it ...
3
votes
1answer
429 views

Defend against Blind ROP

At IEEE Security & Privacy, the blind return-oriented programming attack (blind ROP) was just introduced. In some sense, this is just another variation on ROP attacks -- but the blind ROP attack ...
29
votes
6answers
4k views

Best practices for securing an android device

Does anyone have any suggestions on securing an Android device? I'm not particularly interested in enterprise level software - I'm looking to secure my own ZTE Blade phone which has a lot of personal ...
3
votes
3answers
361 views

System Hardening: Outsource to Security Expert or have Sys Admin do it? [closed]

Can any of you security experts help me make a decision on how to deal with staffing for an initial hardening for an Apache server running MySQL and PHP? We are working on a new site have to do ...
11
votes
5answers
2k views

Best practices for securing an iPhone

As this question on voicemail protection got answers veering more to protecting the mobile phone, I thought I should add a specific question on this topic. There is already a question on protecting ...
34
votes
6answers
6k views

Secure Linux Desktop

I'm looking for hints about secure linux desktops. Securing servers is no problem. Most recent Software Updates, run only the services required etc. But what about desktops? I'm thinking about details ...
0
votes
2answers
155 views

Anonymizing data for applications

I try to design a system which reads events comming from devices, stores them and exposes API to various applications. Originally I wanted to introduce a module Id translator, so I would store only ...
4
votes
2answers
360 views

Mainframe security [closed]

I am new to mainframe security testing practice. So far I have read a few articles on that even security of mainframe can be compromised. I would like to know if there are any such checklists that ...
1
vote
2answers
214 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 ...
0
votes
2answers
223 views

Debian missing security features?

Debian (stable) is a well respected server Linux distro. I was surprised to see that in their hardening walkthrough (https://wiki.debian.org/HardeningWalkthrough) they do not support position ...
1
vote
0answers
295 views

Disable HNAP on D-Link router [closed]

I'm concerned that Home Network Administration Protocol (HNAP) is a serious vulnerability that exposes consumer network routers to remote management by malicious entities such as government ...
12
votes
2answers
5k views

Available Resources for Securing RHEL 6

Some in our infrastructure group want to upgrade to start taking advantage of the new features in RHEL 6. In the past, I have relied on the NSA Guide to secure RHEL 5 and CentOS 5 installations. I ...
23
votes
7answers
1k views

How can I protect a WordPress installation?

How do you go about protecting a default WordPress installation? What checklist do you use, best practices, tips and tricks, etc? Any recommendations on plugins, third-party tools are welcome.
5
votes
2answers
410 views

Oracle Internet Directory (OID) hardening

What are best practices, recommendations, required reading for securing/hardening an Oracle internet directory? note: OID is compatible with LDAP version 3.
1
vote
1answer
664 views

Virtual Box security [duplicate]

I am using virtual box to run a secure machine. I am not fully confident in the hosts security. My assumptions are that of course the host can read the VM when the VM is running and that if the ...
1
vote
1answer
503 views

Bounds checking using Intel's MPX

Intel has recently added new instructions to their instruction set to support bounds checking. Intel calls them the Memory Protection Extensions (MPX), and they are described in Chapter 9 of this ...
10
votes
3answers
453 views

Finding out what headers are visible

I would like to find an easy way to find out what headers are visible on my websites. For example PHP version, server etc. I've looked around and can't seem to find a good explanation on the subject ...
1
vote
0answers
91 views

DLL preloading attack - are IAT libraries affected too?

I'm about to distribute a dll library (there's also a linux version) to my users but I'm afraid of dll preloading attacks (i.e. someone substituting its malicious dll to get called by mine and gain ...
6
votes
3answers
921 views

How to effectively (and reasonably) secure Windows in corporate environment.

A member on my staff recently had their work computer compromised while on their home network. The following is the information regarding their computer Windows XP SP3 - fully patched at the time of ...
3
votes
1answer
266 views

How Secure Rooted or Jailbroken Devices are?

I am just wondering, but how can I harden the security of jailbroken or rooted devices? I understand that SD Card can be still accessible, but how could potential adversaries compromise for example ...
1
vote
0answers
190 views

Securing MS Exchange [closed]

I have read quite a bit on the subject of securing MS Exchange - most notably the Client Access role. With the retirement of Microsoft's Threat Management Gateway many people seem to be looking for an ...
1
vote
1answer
162 views

Hardening Services, Ports on OSX

People boast about OSX Security, yet I find it very hard to find a comprehensive manual in regards to any equivalent Services and the ports they use. I am aware of lanchd and launchctl and Lingon is ...
1
vote
2answers
191 views

How secure is a Windows PC that is routed through a Linux PC?

I have a Dual PC setup. Two PC's are networked together via crossover cable. The Windows PC is running Windows 7 SP1 64-bit and the Linux PC is running Slackware 14 64-bit with iptables. My firewall ...
8
votes
5answers
1k views

Securing Debian Apache PHP Server

I have Debian Apache PHP server. I want to secure him after the classic installation process. My usual steps are : List item update all packages remove all unnecessary services like named, portmap, ...
2
votes
1answer
3k views

TCP syn attack prevention

I am new to implementing information security. However i am trying to harden a windows server.I am using regedit to create parameters like SynAttackProtect,TcpMaxHalfOpen and TcpMaxHalfOpenRetried and ...