Unanswered Questions
4,180 questions with no upvoted or accepted answers
17
votes
1answer
983 views
Emacs and EasyPG not performing public key encryption
I have a file which I edit and encrypt following this guide.
I'm a noob as far as security goes and thought that the point of including the line which specifies the cryptographic key to use
-*- mode:...
12
votes
0answers
2k views
DMA attacks despite IOMMU isolation
If you're already familiar with PCI behavior and Linux's handling of DMA buffers, skip to the third section for my actual question. Otherwise read on for a small summary of how PCI devices perform ...
11
votes
1answer
441 views
Fully transparent proxy
By default mitmproxy will use its own local IP address for its server-side connections. What I want instead is mitmproxy to use the client’s IP address for server-side connections.
The following ...
10
votes
0answers
517 views
OpenSSL EVP aes_256_cbc Initialization Vector Size
I'm looking at the crypto library examples (programmed in c) provided for OpenSSL EVP on OpenSSL Wiki.
Their example for a 128 bit Initialization Vector is as follows:
/* A 128 bit IV */
...
9
votes
1answer
1k views
Openid connect nonce replay attack
The openid connect specification adds a nonce parameter to the authorize endpoint, which must be echoed back as a claim in the id_token. It claims that the purpose of this parameter is to prevent ...
9
votes
1answer
339 views
Pin required for accessing (smartcard) Card Authentication Slot
So let me set the stage:
I have created an Intermediate Signing Certificate by way of the Yubico walkthrough: https://developers.yubico.com/PIV/Guides/Certificate_authority.html
I made a couple ...
9
votes
2answers
2k views
dnsspoof not spoofing (requests and forwards real DNS packet)
I was trying to use dnsspoof but it did not work as expected. These are the steps I followed:
Set IP forward in kernel to 1
arpspoof -i eth0 -t 192.168.1.39 -r 192.168.1.1 and arpspoof -i eth0 -t 192....
9
votes
3answers
5k views
SQL Injection Escaping Challenge Security Shepherd
I am using Security Shepherd as a training tool and I am now in challenge SQL Injection Escaping Challenge. The challenge is as it can be seen below:
When I makae a query just like the one above (...
9
votes
2answers
3k views
importing OpenVAS xml in metasploit
I am practising in my lab with some metasploitable machines, and I just realised that the vulns declared by OpenVAS 6.01 in the scan report aren’t imported in Metasploit 4.11.5 by the db_import report-...
8
votes
1answer
163 views
Security implications of download attribute
The download attribute in an a element tells the browser to force the download of a file that otherwise would be interpreted by the browser. This is very convenient, since often users want to download ...
8
votes
4answers
780 views
Prevent against OTP abuse in app sign up flow
This may sound like an open ended question, but I would like to take my chances and understand if there is any way the rest of the community is handling this issue.
Let's say there is an app that ...
7
votes
1answer
128 views
risk from USB-C port on locked laptop
If an attacker has access to the USB-C port on my laptop which is in powered on but at the lock screen, what is the risk that they are able to carry out an evil maid attack? Say I'm in the room but ...
7
votes
0answers
131 views
Protection against Android Reverse Engineering
I have been particularly trying to find the most effective measures to protect an apk from Reverse engineering and abusive use.
While continuing my research I came across various top rated apps and ...
7
votes
1answer
341 views
PSD2 compliant two factor authentication
According to PSD2 the elements of the multi-factor authentication must be independent so the compromise of one element does not compromise the other.
Here is the article from the directive:
*...
7
votes
0answers
268 views
Can SRP be implemented using libsodium
I am using libsodium for cryptography and I want to use SRP for key exchange. The wikipedia page lists a python example, but I am not sure if and how I could convert this to libsodium function calls.
...
