All Questions

9
votes
0answers
153 views

Malicious PDF Analysis

I have been analyzing a PDF I suspect to contain malicious content. For the most part, I've always trusted automated tools to determine if a PDF was safe to open. However, my eyes have been opened to ...
8
votes
0answers
90 views

Is Bluetooth's “advertising” mode more secure than “discoverable” mode?

I understand that there are many security issues associated with Bluetooth's "discoverable" mode, and have avoided it where I can. However new features of many systems (e.g. Apple's ...
7
votes
0answers
168 views

Yubikeys & SSH - which option is best for lockdown?

My company has a few dozen servers hosted on a cloud provider. All but one (OpenVPN host) is closed to the internet. We're using OpenVPN AS which uses certs + Google Authenticator for login. We are ...
6
votes
0answers
77 views

CTF competitions/challenges that are Windows based?

I've been messing about in CTF's for a while and I also do pen-testing professionally, what i've noticed is a distinct lack of CTF competitions using windows environments. This is in stark contrast ...
6
votes
0answers
118 views

Security Risks of BD+

I have recently been reading about the DRM measures on commercial bluray disks, in particular BD+. It seems that this technology involves Java software running in a virtual machine, with full access ...
5
votes
0answers
162 views

When does iOS check validity of enterprise certificates?

This article should give a little more context (and see my comment on it, same username, for additional info): http://www.engadget.com/2014/10/08/ios-update-will-block-emulators/ iOS developers are ...
5
votes
0answers
164 views

Decentralised password recovery

Are there good/established techniques for password/key recovery in situations without a centralised service? (Anything goes, but I'd prefer solutions that distribute the recovery information across ...
5
votes
0answers
702 views

Example of how the remaining shellshock bash bug CVE-2014-7169 (taviso bug) could be exploited?

I have a general idea about the Shellshock bash bug (CVE-2014-6271 reported Sep 24, 2014) of what the vulnerability is and how it could be exploited. Here you find examples on how to exploit the ...
5
votes
0answers
84 views

Maximum number of nodes with IPSec?

From my understanding, for incoming packets over IPSec, the Security Association (SA) is identified by the SPI field of the ESP header. Then let's say I have a bunch of nodes where each node wants to ...
5
votes
0answers
113 views

Google Authenticator Error on Reboot

I have set up an SSH server to accept only login using codes generated by Google Authenticator (I have disabled all other forms of authentication on that port). After having rebooted my remote ...
5
votes
0answers
101 views

Does any OpenID identity provider allow site-unique arbitrary email addresses?

Since OpenID officially furnishes email address to sites (with the user's permission) as a convenience rather than an attestation, is there any OpenID identity provider who'll allow you to ...
5
votes
0answers
151 views

Bootstrapping an EC2 Spot Instance

I'm considering using EC2 Spot Instances in an automated fashion (ie create a script that will request EC2 Spot Instances that will run unattended). For this specific use case, I'm happy to lock down ...
5
votes
0answers
562 views

MPPE-Send and Receive key derivation from MS-CHAPv2

I am trying to get the MS-MPPE-Send-key and MS-MPPE-Recv-key from the MS-CHAPv2 challenge material. I am able to follow the RFCs 2548 3078 and 3079 to the step of getting the GetNewKeyFromSHA() it is ...
5
votes
0answers
194 views

Use token for Windows Server 2008 AD RMS

I have a Windows Server 2008 configured for AD RMS (Active Directory Rights Management Service), another Windows Server 2008 machine that is the domain controller, and a third machine that is a member ...
4
votes
0answers
103 views

How can I explain to the client that rfc2385 TCP MD5 Checksums can't be turned on for linux webservers?

I've had a long running conversation with a client where they perform a Rapid7 security scan which then warns about TCP MD5 checksums missing on port 80. This is what I think I know: RFC 2385 was ...
4
votes
0answers
63 views

Connection Android - Baseband Processor - SIM Card

I currently examine the hidden components of a smartphone, inspired by the research of Weinmann All your baseband belong to us and Karsten Nohl Rooting Sim Cards. According to Weinmann, the ...
4
votes
0answers
87 views

Why doesn't the 802.11 standard implement TLS for wireless handshakes between clients and routers?

Why aren't wireless handshakes sent using TLS? It seems like it would be relatively simple to implement, perhaps having the vendor insert the private key into the routers. That way WPA/WPA2/WEP ...
4
votes
0answers
94 views

Does password-hashing “busy-work” need to be cryptographically secure

All modern password hashing schemes are deliberately designed to include a huge amount of "busy-work", to limit the speed with which an attacker would be able to conduct password hashing attempts. ...
4
votes
0answers
177 views

CERT FOE Fuzzing Framework documentation

So I read another post here about fuzzing local standalone applications. I have understood how to exploit basic buffer overflow vulnerabilities in standalone applications and am now looking on how to ...
3
votes
0answers
62 views

How does a browser manage secure sessions and store session keys?

I am interested in how a browser manages secure sessions. As I understand it this is the scenario when logging into a google account: 1) Browser (B) and google Server (S) perform a handshake to ...
3
votes
0answers
82 views

Is it possible to retrieve SSH v2 credentials in a username/password authentication scheme?

I'm currently analysing a compromised network(root access has been gained to a workstation and logs show that it has been used for port scanning and service brute forcing attacks on the remaining ...
3
votes
0answers
50 views

Linux, TRESOR and XTS

I want to switch from using LUKS for full disk encryption to TRESOR. TRESOR tries to prevent cold boot attacks by storing the encryption key in the CPU's registers. It uses the kernel's crypto API for ...
3
votes
0answers
43 views

Opening mail from IMAP with no risk for the user

I'm building a website for an association. Its aim is to, out of other thing, provide an easy mail manager to communicate with the member, stored in a database. This database is always up to date as ...
3
votes
0answers
46 views

Freezing creates unusual pattern in kern.log

My server freezed a few days ago. After restarting I immediately checked the logs and the only trace I saw were some dots in the kern.log. To my surprise, a day or two later these dots disappeared ...
3
votes
0answers
43 views

What are appropriate measures to only allow logins from a given trusted OpenID-Provider?

I have a bunch of applications, where users need to log in. Not everyone can be a user, each user has to be approved of by an admin. The authentication should be a SSO solution, where user accounts ...
3
votes
0answers
69 views

Are malware detection rulesets publicly discoverable?

I am uncertain about how public malware detection rulesets are? By a "ruleset" I mean the rules, usually written in Yara, that malware detection engines use to determine whether a file or memory ...
3
votes
0answers
58 views

Fastest public-key algorithm for testing purposes

As part of an automated test suite I need to run a lot of gpg --encrypt and gpg --decript processes. In order to make each invocation of gpg --encrypt and gpg --decrypt will be faster, I would like ...
3
votes
0answers
209 views

PGP-encrypted Email or SSL/TLS Webform for Responsible Disclosure Communication?

So it's a fairly simple question. When offering an avenue to security researchers for communication with us regarding disclosure of security vulnerabilities, what's the best way to do so? Assume we ...
2
votes
0answers
62 views

Which keys does a bank typically exchange with a card scheme?

I'm trying to understand the different EMV-related keys that are shared between a bank who issues EMV cards and a card scheme, such as Visa or MasterCard. I understand the bank would typically ...
2
votes
0answers
53 views

Burp Suite Active Scanning Wizard options

I have been making use of Burp Suite's active scanning functionality for some of my recent web application assessments and I had some questions about the active scanners ability to remove urls from ...
2
votes
0answers
44 views

Are there any ways to leverage NTLM V2 hashes during a penetration test?

I am on a penetration test at the moment, where LM/NTMLv1 hashes are disabled. I have captured a number of NTLMv2 hashes via NBNS spoofing, however was unable to crack them after running them through ...
2
votes
0answers
49 views

CRL check for TLS client certificate on Linux?

I run a web service. Clients authenticate using a TLS Client Certificate issued by a 3rd party CA. All certificates include the CRL distribution point, but do not support OCSP. How do I configure a ...
2
votes
0answers
94 views

cisco asa syn flood detection and response not working

I have a Cisco ASA 5510 (ASA Version 8.3(2)) that has been getting a syn flood attack on it (or more accurately through it - targeting a host behind it) a couple of times a day for the past few days. ...
2
votes
0answers
96 views

What unique device fingerprinting information can an iOS8 app collect?

As a follow-on to this question: What unique fingerprinting information can an iOS7 app collect? What remaining device fingerprinting privacy / security vulnerabilities still exist as of iOS 8? Can ...
2
votes
0answers
42 views

E-voting: receipt-free, verifiable, and anonymous

Background In response to a system design concept, a question was posed: How do you achieve electronic voting, anonymity, and verifiability at the same time? I was informed that most experts in ...
2
votes
0answers
169 views

Some http requests are not send encrypted by vpn! Why?

I subscribed to a VPN service recently, and installed wireshark to take a look at the traffic sent from my computer. Practically all of it goes through UDP protocol, encrypted. But there are two HTTP ...
2
votes
0answers
19 views

Email, Certificates and DANE

Does DANE offer the ability to provide certificates for services? Or is it just hosts? How does one specify a mail server with DANE? If my email is jd@foo.com but mail.bar.com is the email server, ...
2
votes
0answers
268 views

Content-Security-Policy & Facebook login

This question seems to be related to http://stackoverflow.com/questions/15913200/facebook-js-sdk-not-executed-in-my-chrome-extension , but I am not developing a chrome extension. I am developing a ...
2
votes
0answers
129 views

Can we create custom APDU for non-smart (memory type) contactless card?

I want to implement card-based authentication for the parking system in a university. Currently all students own a Java Card-based student ID card, if they have not broken or lost it. Can we create ...
2
votes
0answers
596 views

FIDO, U2F Compatibility

I've been following the FIDO standard (a consumer-friendly public-key system similar to SSH key pairs) and it appears that it's close to being complete: both Google and PayPal have been testing it ...
2
votes
0answers
75 views

Threats against website running without TLS but with PGP messages

Are there any threats against a web site that isn't running SSL but uses PGP to encrypt all information to the server (except session identifier) The information flow is as such: 1. Session ID set on ...
2
votes
0answers
135 views

What if anything is the security differences between team viewer 7 and team viewer 9?

Is anyone aware of any major overhauls or security fixes to Team Viewer 9 (since v7) or does the popular accuvant blog ...
2
votes
0answers
174 views

Intrusion prevention in windows azure?

When using the Windows Azure IAAS servers how does one setup IPS for all incoming traffic to these servers? How would a regular user who runs his whole environment within Azure make sure that he can ...
2
votes
0answers
240 views

What is going on with my download of the recent Apple security update?

The update in question is the Mavericks combined update which, among other things, claims to fix the recent SSL vulnerability/gaping hole. This issue really annoyed me, so I decided to procure ...
2
votes
0answers
311 views

copying roaming profile credential file of another computer

I am trying to recover login information of another computer. I have managed to copy the local/roaming profile credential files located in C:\users\%username%\APPDATA\local\Microsoft\Credentials\ and ...
2
votes
0answers
177 views

security clearance for programmers

I am programmer by day and night, I work within security at the moment working on some security products. I have noticed a few non software engineering based roles which require security clearance. I ...
2
votes
0answers
46 views

Arbitrary methods directly callable with Front Controller pattern

I'm working on converting an application that uses the traditional Page Controller pattern to start using the Front Controller pattern. One of the potential problems I'm thinking about is that with a ...
2
votes
0answers
187 views

How to verify a message?

I have a 192 bit data string and a 384 bit signature calculated with curve ANSIp192r1 as well as the public key. These readings originate from a SYM2 electricity meter and I would like to ...
2
votes
0answers
261 views

How do I convert from this weird John/Asleap format to lc (for HashCat)?

I'm trying to setup a system for pen-testing. I'm using the FreeRadius-WPE patch to collect Challenges/Requests from people who connect to my spoofed AP instead of the actual network. Here is the ...
2
votes
0answers
86 views

Main difference between Yahalom and Needham-Schroeder key exchange protocols

I am just wondering what is the main difference between the Yahalom and Needham-Schroeder key exchange protocols? Which protocol uses less computational power?

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