1
vote
1answer
147 views

Detect port scans on Linux (centos) [closed]

I have OSSEC installed on my hosts. I want to detect port scans and generate an alert in OSSEC. So, how can I detect these port scans? Is it possible reading iptables logs? Do you recommend some ...
1
vote
0answers
178 views

MQTT (Mosquitto) certificate SSL23_GET_CLIENT_HELLO:unknown protocol [closed]

I'm been desperately trying to get my MQTT clients to connect to my MQTT broker which is set up with a certificate from a CA. To be able to get the CA certificate, I've used the letsencrypt python ...
1
vote
1answer
85 views

Fast data integrity protection

I have a small device with a 16-bit (embedded) architecture, which transmits 1500 bytes every 3 milliseconds. This device has no built-in integrity protection, and it is possible to manipulate the ...
1
vote
1answer
81 views

Is reseeding OpenSSL CSPRNG necessary if using RAND_bytes?

I read that cryprographic secure PRNG (CSPRNG) need a random seed to provide random output. Looking at OpenSSL that seems to be archived by RAND_poll() and random data is fetched with RAND_bytes(buf, ...
1
vote
0answers
20 views

IX509Extension XCN encoding?

I understand from reading MSDN that the X509 v3 extensions must be handcrafted. This involves the CRL, AIA, name and policy constraints, policy mapping, private key usage period, and subject ...
1
vote
1answer
78 views

School website exposes root FS, where to report?

I was googling for some PCI device code and stumbled upon an indexed /sys file on a web server. Poking around a bit, it seems that the complete root filesystem is exposed trough /uploads/ls. So I can ...
1
vote
2answers
73 views

After encoding process with msfvenom, my tool is not working. Why?

I tried to encode my tool, which was developed by me with Ruby, by using msfvenom of Metasploit Framework and I succeed. My source code was encoded completely. But, when I tried to use my encoded tool,...
1
vote
0answers
29 views

Moving Target Defense implementation in context of SDN

I need to demonstrate MTD for a project in context of SDN by writing logic for the SDN controller. The logic could be as simple as creating a new Virtual IP every n seconds. However, i would like some ...
1
vote
1answer
50 views

How do you remotely BOF without knowing source code? [closed]

I have two questions. Note that I have very basic understanding of how BOF works, but don't know the exact mechanism or anything beyond what an ordinary computer user knows. My understanding of BOF ...
1
vote
1answer
54 views

Why does the result of ssh-keyscan -H contain a header line with the un-hashed server ID?

I'm attempting to build a global known_hosts file for my AWS VPC, and was looking at using ssh-keyscan to acquire the fingerprints of new servers as they are created. The -H option seems sensible, as ...
1
vote
0answers
20 views

PCI-DSS Helping customers with a third-party booking service

My clients are able to pay for services through a website EXAMPLE.COM. Sometimes, a client will call on the phone looking to pay for services over the phone. I would like to use a device to visit ...
1
vote
0answers
58 views

Correct metasploit search usage (or bug?)

I just noticed that the metasploit search keyword does not produce results as I'd expect it. If I search e.g. with search platform:linux I get proper results limited to Linux. But if I add ...
1
vote
0answers
39 views

Bad security vs no security [duplicate]

In our company we currently have a disagreement about imperfect security. Our current main project is an embedded device with a web server running on it. One of our customers wants HTTPS for that web ...
1
vote
1answer
91 views

CSRF in API calls from Javascript on the browser

I noticed tokens used in form submissions to prevent CSRF attacks, though in 2016 a lot of people are moving to JS frontend & restful API backends. I'm puzzled, with this approach is there no need ...
1
vote
0answers
36 views

SAQ D PCI Compliance for Custom Shopping Cart

We use a custom developed open-source e-commerce software. We are SAQ D and I am trying to figure out which of these requirements applies to our cart if: We aren't storing credit card information We ...
1
vote
2answers
208 views

Pin delivery: SMS, mail, or pin mailer?

Imagine a scenario where a 4-digit pincode needs to be delivered securely to an end-user. Several possibilities exists: Pin mailer (this seems to be standard according to ISO 9564-1) SMS Email Email ...
1
vote
0answers
78 views

Force Browser to not URL encode specific chars [duplicate]

I try to get a XSS to work but the problem is, that the XSS is only working within BURP because there I can send for example '>' as an not URL encoded String. As soon as I try it in the browser, it is ...
1
vote
2answers
120 views

How can someone know technically if antivirus provider tracks him? [closed]

Is there a technical way to make sure that your antivirus provider doesn't send any information from your computer? Is there a reliable list of antivirus providers that this issue was checked and it ...
1
vote
0answers
54 views

Recommended End-User Authentication for OpenID Connect / OAuth 2 [closed]

I am learning about OAuth 2 and OpenID Connect. Reading the documentations I feel that the specification of OpenID Connect leaves some blank space regarding the End-User Authentication. The spec ...
1
vote
1answer
77 views

How easily could this method of cryptography be cracked? [closed]

Background A couple of years back, in my naivety I dreamt up a method of encrypting information, the result can be seen on my website, I evidentially thought it was pretty neat and I decided to mix ...
1
vote
0answers
158 views

Attackers on sc.imp.live.com [closed]

"Deceptive site ahead Attackers on sc.imp.live.com may trick you into doing something dangerous like installing software or revealing your personal information (for example, passwords, phone ...
1
vote
2answers
93 views

Deep Packet Inspection: Any real world examples of threat mitigation via DPI? [closed]

So I understand conceptually how DPI works, but I'm a little skeptical regarding the actual benefits of this technology. Considering the possible risks associated with deploying DPI, i.e., decrypting ...
1
vote
2answers
55 views

Using mutual authentication, should I still worry about message integrity and replay attack?

I'm trying to secure a REST API, our situation is that every client connecting to this API will also have a certificate signed by our own CA. Because of this, I think we can use the client certificate ...
1
vote
0answers
61 views

How Do I Create a Production Client Authentication Certificate for Azure Key Vault?

I am learning about Azure Key Vault, and one of the scenarios it supports is certificate authentication, which you can read about here. The samples do a great job of explaining how to make a self-...
1
vote
0answers
57 views

Open source tool to test a WAF against OWASP Top 10? [closed]

Are there any open source tools to test a WAF against OWASP Top 10? Especially I am looking for a tool that tests a WAF against different types of attacks & reports test results.
1
vote
0answers
116 views

How to keep my VPS server up on Hulk.py attack

This question in not duplicated, I tried everything that was published on stackexchange websites, but could not fix my problem. I have a web server. OS: Ubuntu 15.10 Configured on Apache2 Ram: 1.5 GB ...
1
vote
0answers
178 views

Securing a JavaScript Single Page App with SAML

I would like to secure a JavaScript Single Page App with SAML. My server is powered using Node.js and serves a RESTful API. What are my options? Details: I have worked with OAuth2 in the past, but I ...
1
vote
0answers
53 views

What personal information, if any, can be gleaned from a Microsoft APPCRASH problem signature?

I am trying to debug an "APPCRASH" problem event for a program running on Microsoft Windows 7. When this happens a problem signature is presented, like this example from SuperUser: Problem Event ...
1
vote
0answers
72 views

What are the appropriate steps to take after installing a questionable Android app?

Situation: User installed an Android app from the Google Play Store. User's device is rooted, but that app does not have root privileges. XPrivacy reveals that the app is trying to make IPC (inter-...
1
vote
1answer
83 views

VPN to protect traffic from one server to a remote site

I need to install a server at a customer's site (Site A) that needs to communicate securely to a network at another site (Site B). The communication between Site A and Site B is over the internet. ...
1
vote
1answer
176 views

securities concerns about calling REST API from multiple servers

There is a master web application that needs to call REST APIs from servers of other applications. I can think of two ways to achieve it: a). call APIs on the front-end of the master application(...
1
vote
1answer
110 views

Can Passpoint X.509 certificates be used to MITM SSL connections on Passpoint networks?

Passpoint/Hotspot 2.0 public networks like LinkNYC require users to install X.509 certificates, for EAP authentication. Can these certificates be used by the provider to execute man-in-the middle ...
1
vote
1answer
309 views

difference between need to know, least privilege and confidential

I'm studying for CISSP. Is least privilege, need to know and confidentiality all the same thing? In my book it says "confidentiality is sometimes referred to as the principle of least privilege" and ...
1
vote
0answers
35 views

Is there an easier way to test suricata has enough resources to run without losing packets?

I'd like to see the effect of changing my Suricata hardware and software, and in particular make sure I can determine the rate above which I'll start to lose data. I'm running ESXi with 20 cores and ...
1
vote
1answer
63 views

Key rotation benefits of a multi-key hierarchy

I think I have a decent grasp of the problems associated with key rotation, and as I'm working through them determining an approach for key management on an application I keep stumbling up against ...
1
vote
0answers
64 views

How to react to the glibc vulnerability as an OSX user? [duplicate]

Apologies if this question isn't really fit for this SE site. Wasn't sure whether to post it here, or on apple.SE. What's the currently best way for a user of OSX to react to: https://...
1
vote
2answers
113 views

Why did I get a wrong IP and certificate for www.facebook.com just now? [closed]

I just navigated to www.facebook.com and my browser alerted me that an invalid certificate has been received. I checked the cert in question, and I was surprised to see that the Common Name on it was ...
1
vote
0answers
68 views

Where can I find example or template security testing contracts? [closed]

I'm a lawyer interested in information security, and am collecting templates and examples of security testing agreements to compare. What are some publicly available examples, or nuggets of wisdom ...
1
vote
0answers
118 views

Can password hashing both client side and on the back end improve security if we don't necessarily trust the server? [duplicate]

I want to know if it ever makes sense to hash a password client side and rehash it again on the back end. I've not seen this done before which makes me suspicious as to whether it really does add ...
1
vote
2answers
77 views

Access MySQL via MySQL credentials, assuming no remote MySQL, FTP, or SSH access?

LAMP stack, dedicated server. I set up some MySQL users, gave them full access rights to the necessary databases, and provided the user credentials to some freelance developers. Now that the project ...
1
vote
0answers
29 views

Informational security model models and life-cycle

NSM model from sans.org is vendor neutral,that's good, but I need more detail and complexity model. Don't want to invent a bicycle and looking for complete solution in this field.Looking not for blog ...
1
vote
0answers
57 views

Encoding payloads for GWT version 7

I'm auditing a website built with Google Web Toolkit. It uses serialization version 7, so the tools from GDS Security won't work (they only work till version 5). Using this technique I got all classes,...
1
vote
0answers
104 views

Is control theory of any use in the Infosec disciplines? [closed]

I'm currently studying Engineering in a European university (not CEng, though), and I've always been fascinated by the network security/information security field. As far as I know, crypto is the ...
1
vote
0answers
67 views

Is that a way break Linux user password by bypassing grub protected?

The best way to delve into others Linux machine is by editing the grub. Many will start by, editing the line ro quite splash as rw init=/bin/bash during the startup (usually by pressing button e on ...
1
vote
0answers
17 views

Where can i find information about Ipsec Xfrm framework?

I have searched online and found very little information about the ipsec xfrm framework, including the book Networking implementation and Theory.. Where can i get more information about xfrm ...
1
vote
0answers
99 views

Pros and cons of this password reset scheme?

I handle the process of password resets at the institution where I work. Currently, we require users to make up questions and answers (three minimum and five maximum); the questions cannot repeat, nor ...
1
vote
0answers
42 views

Followup to one-liner to create cert request with SAN

I've been trying to use the OpenSSL line from this older thread to create a CSR with subject alternative name: Provide subjectAltName to openssl directly on command line If I run the line from that ...
1
vote
0answers
116 views

Should javascript and css “.map” source maps be included on production servers?

Source maps are a convenient way to work with directly with code that has been obfuscated and/or minified, yet trace errors back to the original "pretty" code. My understanding is that obfuscating ...
1
vote
2answers
165 views

Security concerns of running auto-login script on server-side?

I would like to fetch data from a website to do data analysis on a server. Username and password are required for login to the website. Therefore I will need to run an auto-login script on the server. ...
1
vote
0answers
61 views

How to authorize users for rest service

me and my friend are doing a project for a company. It involves getting some information from the database and display it on a smartglass device (epson, sony, ...). Now we want to build a RESTful ...

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