0
votes
3answers
312 views

How to organize a CTF?

In the context of an IT event, my team would organize a CTF (Capture The Flag). About the challenges (we’re working on them). I want to have some references on the types and levels of difficulty that ...
0
votes
1answer
96 views

Are firefox bugs cross platform? [duplicate]

I use Ubuntu and last firefox version. I opened an image with firefox, and a crash occurred. Let's assume it's a crafted jpg to run an exploit, and execute arbitrary code. To sum up: (1) Firefox ...
-1
votes
1answer
52 views

Solving the code delivery problem via hashing the source GET'd [closed]

TLS gives you the confidence you're talking to the servers you trust, right? Yet, why should I give confidence to a page (likely to be a application today) that I've never read the source code, ...
9
votes
1answer
960 views

Checksums do not match when I download file over http

Just for the test I did the following: Downloaded a page from wikipedia via wget on remote server and named the file test.dat. Then I executed md5sum. I download the file via http and check it back ...
0
votes
2answers
396 views

Hashing request - What type of hash this?

I have a text which is hashed using several layers of hashing. The final hash looks like 2E55A1DD65AB839E62362DEF86D329D7. What type of hashing can it be? How can I find out what kind of hash sum I do ...
0
votes
1answer
59 views

How to save a web page with its certificate?

I've made a payment to an online store and they're claiming there's no order with the number that appeared in my screen, therefore they're refusing to send me the product. I still have the page opened ...
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 ...
0
votes
1answer
67 views

When, during authentication, should I ask for an OTP token?

I was working on implementing an OTP strategy in our login process of a web application when I was asking myself: Should I ask for the OTP token before or after asking for the username/password? What ...
0
votes
2answers
72 views

Current standard of authentification

What is the current standard of authentification? I thought it is server and client authentification. But I typed for e.g. https://www.google.com/ and checked the packages in wireshark. And there ...
4
votes
2answers
325 views

What do I do about a forgotten, ancient PGP key?

So I just created a new PGP key because I want to start using PGP to encrypt my emails. Lo and behold, this is apparently not my first attempt to use PGP. Five years ago, I created another PGP key ...
2
votes
0answers
161 views

How can I determine whether or not a POS terminal violates requirements in the PCI DSS?

The business I work for uses an Equinox Optimum T4220 (hardware number 060001) in dial-out mode. I see two search results1 for "T4220" listed on the PCI SSC's website under Approved PIN Transaction ...
1
vote
1answer
572 views

FTP over SSL vs HTTPS implemention

Consider two implementations of SSL on a HTTP server and on an FTP server. With the same cipher suites used and the exact same protocols used. Is one more secure than the other. I have heard that it ...
1
vote
1answer
131 views

Digital signatures and weak hash functions

There was this question in last year's exam. The teacher claims that answer b) (in boldface below) is correct. Attacks are constantly being performed on digital signatures which use weak hash ...
1
vote
3answers
149 views

How to compare passwords with duplicate password

On Steam, the gaming client, I have this habit of creating multiple "smurf" accounts. I have a randomly-generated, unique password, and I decided to use the same password for all of my multiple ...
3
votes
1answer
1k views

My sendmail started sending spam; what is causing it to do so? [closed]

Today my sendmail service started sending e-mail to various addresses. /var/spool/mail: From MAILER-DAEMON@noxcommunity.com Fri Jan 30 22:15:30 2015 Return-Path: ...
6
votes
2answers
4k views

Security of LXC compared to OpenVZ

For years, I'm now using OpenVZ on my server, but support discontinued for Debian and Ubuntu, current releases seem to focus on LXC now, which is not a bad idea from the point of comfort. But what ...
1
vote
2answers
223 views

Does “Magic Numbers” weaken encryption?

I was wandering at superuser and I found this question: Compress and then encrypt, or vice-versa? Nearly all files have a Magic Number at a certain position in them. So, I wonder if I can attack (to ...
1
vote
2answers
155 views

Is the convertomp3.com website hacked? :) [closed]

I wanted to convert a youtube video to mp3, but the website gaved me an EXE? ...
1
vote
2answers
2k views

How should I deal with adware in chrome on ubuntu?

I use chrome (but also have firefox) on ubuntu 14.04 32-bit. Recently I started getting popups from 'softwareupdaterlp.com'. I had the sense to realize it was not legitimate and I didn't click install ...
2
votes
1answer
284 views

Learning ethical SQL injection with php login form

I'm learning ethical hacking and now I'm on sql injection topic. I'm also new to SQL and php. Ok, so I have local damn vulnerable website with back-end Linux, MySQL and Apache and now trying to use ...
1
vote
1answer
41 views

How can user credetials be leveraged when doing a penetration test for a Windows network? [closed]

Assume the following scenario: NTLMv2 only Only Vista machines or higher Remote desktop disabled throughout network No open shares psexec needs administrative level access. Without any shares ...
5
votes
4answers
278 views

How can I determine the domain controller when it's not in DNS?

On a penetration test going in blind for an organization, meaning no knowledge of network topology of design, no idea what the domain(s) might be, and domain controller is not apparent in DNS...how ...
2
votes
3answers
2k views

promiscuous vs monitor mode in 802.11

I've been reading up on promiscuous mode and monitor mode as they relate to 802.11 networks. I understand the difference, which is explained here: What is the difference between Promiscuous and ...
2
votes
3answers
11k views

Wife was conned into allowing her computer to be hacked, what do I do? [closed]

My wife had a popup on her old Windows Vista laptop (which I've been threatening to switch to Ubuntu Linux). It appeared to come from our ISP, and informed her that she was hacked, and to call a ...
1
vote
2answers
113 views

Can an executable be scanned for calls to the vulnerable glibc ghost functions?

The ghost vulnerability has the potential to be vulnerable to many many pieces of software that call the gethostbyname() and gethostbyname2() functions. Is there an easy way to scan an executable to ...
1
vote
1answer
233 views

DNSSEC: Does the algorithm of the ZSK need to match the algorithm of the KSK?

I am in the process of setting up DNSSEC for my domains. Initially I was going to go with algorithm 13 (ECDSA-P256-SHA256), but it seems that dyn.com doesn't allow me to add a DS record with an ...
10
votes
2answers
2k views

How do the Stack Exchange sites protect themselves from XSS? [duplicate]

It seems to me that because Users can post questions and comments in them with HTML markup (possibly <script> tags), Stack Exchange sites would be very exposed to XSS attacks. How do they ...
1
vote
0answers
222 views

Snort rule for outgoing attacks [closed]

I have a pcap file captured from a user PC. I need to analyze whether it has initialized a DOS attack to any server. alert tcp any any -> any 8080 (msg:"DOS flood denial of service attempt"; ...
0
votes
2answers
102 views

SQLmap over uni wifi [closed]

I don't know if this is the right place to ask this question but I'll give it a shot! I was playing around with Kali and SQLmap. I was just scanning some sites nothing serious. When I was doing this I ...
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
votes
1answer
65 views

Undelete-secure AES software and software for carrying out “full undeletion” free-partition-space zeroing/reformatting on Windows?

It is fairly well known that on Windows, when you delete a file (or folder which may contain any number of files and subfolders possibly containing other files and subfolders and so on), Windows just ...
1
vote
0answers
84 views

Is it dangerous to append search query to the base URL?

I'm testing drupal website and I've noticed that search query gets appended to the base URL in the response, like so: query: "hey ho: there" http://www.baseurl.com/search/node/hey ho%3A there query: ...
3
votes
2answers
173 views

Is it possible to “fingerprint” the “patches” applied to a Windows system?

Two situations with a similar goal: 1) You have access to a target network, and you a Windows host. Is it possible to remotely finger print which (operating system security) patches are applied to ...
5
votes
1answer
302 views

How to determine risk ratings for third party mobile apps

Having rolled out corporate mobile phones and tablets, we have MDM in place enabling us to centrally deploy apps to all our users, and can perform remote wipe in the event of a lost device etc, ...
3
votes
2answers
461 views

Website infected with unwanted “redirections”, apparently via javascript code

I'm working on a clients website, and I realize they've been compromised. Early today there was a major problem with a php eval(base64_decode issue. That was cleaned up via Andy Stratton clean.php ...
0
votes
0answers
108 views

XSS encode / decode strange char interpretation

Can anyone tell me why i cant get this XSS to reflect ? or why is this Filtered or not rendering ? The Post sent is : ... Content-Length: 91 add=1&reference=A</><img src=a ...
3
votes
3answers
759 views

Should anti-virus detect metasploit payloads?

As part of a workstation pen test, I copy a simple metasploit payload onto the workstation, and try to run it. Usually this is blocked by anti-virus software. However, sometimes it isn't (I won't name ...
3
votes
1answer
303 views

What constitutes an exploit? I was able to compromise my common household router

Was setting up Wifi at home today (just using the default router Time Warner Cable provides) and was appalled at the minimal security that the web server provides. Default user name/password is ...
5
votes
2answers
213 views

Could a fake tip that my server is compromised be a social engineering attack?

A little while ago I got the following email from an unknown party (using an @alum.cs.[redacted].edu email address): I'm seeing attack traffic from your Linode. Just a friendly heads up that its ...
3
votes
1answer
541 views

How can I intercept XMPP traffic on Android? [closed]

I have been learning about security testing on Android apps, and to intercept traffic I was using Burp Suite. I know it works perfectly for HTTP/HTTPS traffic, but most of the messenger apps are using ...
1
vote
0answers
148 views

Correct approach to secure the back end service - oAuth

I'm developing a OAUTH service (I'm thinking so. It might not be exactly the same.) to open one of our back end API to a Merchants. basically users can purchase goods from Merchant's E-Commerce ...
3
votes
1answer
164 views

How is this web resource hidden from the user? [closed]

Motivation: I've been interested in how various agencies hide data, either through incompetence or willful intent, that is required to be "open". Specifically I've seen oil companies use images to ...
1
vote
1answer
160 views

DES-CBC: Two ciphertext blocks c2 and c5 are equal. Why would this leak information?

Here, suppose that we were able to observe the ciphertext that we know had been encrypted in CBC mode, then how knowing of c2 and c5 ciphertext blocks would leak information ? My professor asked us ...
2
votes
1answer
410 views

HTTP Host Header redirect traffic

Recently, I've seen periodic floods of traffic to my web servers with various Host headers that do not belong to us. The traffic appears to come primarily from China and a decent number seem to think ...
0
votes
2answers
207 views

Encrypt database records to be accessed by multiple users

I want to encrypt serialised customer details and store in a database to protect against attacks where the attacker has access to the raw database records. The records then need to be accessible by ...
2
votes
1answer
689 views

RESTful web application security and authentication scheme

I am building a web application where the front-end is a single-page-app and the back-end serves it through a RESTful API. I want to make sure I implement user authentication with the best security ...
1
vote
2answers
168 views

Any way to revoke old key pair?

There is a many-year-old 1024 DSA key in the public keyservers under my name. There is a 2048 ELG-E subkey for it. I didn't create these keys, they were created for me by a former employer without my ...
0
votes
2answers
66 views

Unpublished server

Is it possible to setup my web server such that only certain sources can access and the public from internet has no access? i am thinking that we could just not publish our web server URL/IP to our ...
5
votes
2answers
945 views

How to check if my usb drives are vulnerable by BAD USB

Mark pointed out that only one chip type is vulnerable to BAD USB, id like to check if mine are, am using only Kingston flash drives here so can you tell me if they are, or if there exists a list ...
0
votes
1answer
2k views

Sign PKCS#7 and verify PKCS#7 signature with OpenSSL

If someone have to transfer X.509 certificates in a single bundle, usually, it is recommended to pack them into PKCS#7. And content of PKCS#7 can be signed. OpenSSL allows to pack certificates into ...

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