SSL (Secure Sockets Layer) and/or TLS (Transport Layer Security)

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1answer
12 views

Why the Websense blocks same site when used with http & not when used https?

I have been working in a IT firm. I have access to some social sites. When I try to open site Links in mail (that are having http://), the websense prompts me that the access is blocked. However, when ...
0
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0answers
16 views

Security considerations for RESTlike HTTP API of an embedded system

I'm designing a HTTP service for an embedded device and wondering if the following security concept is good enough: SSL(Up to Version 3) is enabled by default, TLS is not by limitations of the ...
0
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0answers
9 views

Is it possible to use certutil to export multiple certificates from a local client machine store, to a .p7b file? [migrated]

Is it possible to use certutil to export multiple certificates from a local client machine store, to a .p7b file? Scenario: We have a few legacy certificates based on some legacy templates (2012 R2). ...
1
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1answer
31 views

How often should the DHE p and g factors be recycled?

I've been asked to enable DHE in our SMTP product. I'm stuck on this question: How often should the product regenerate its DHE p and g parameters? I've seen some implementations that use a cron job ...
13
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3answers
1k views

Trying to understand why signatures in root certs “are not used”?

Taken from here: Don't worry if the root certificate uses SHA1; signatures on roots are not used (and Chrome won't warn about them. Why are the signatures not used? Are not root certificates ...
3
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2answers
64 views

What role do hashes play in TLS/SSL certificate validation?

After coming across this question in the Hot Network Questions section and reading the related blog post by Google, I'm starting to become curious as to what role these hash functions play in TLS/SSL ...
0
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0answers
8 views

How should a captive portal handle SSL requests, that are expired, or not authenticated?

What is the best course of action for a user that uses HTTPS anywhere, or tries to access a secure URL (from an phone based App, or from a browser)? Ideally, I'd like to get the phone to "prompt" via ...
0
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0answers
17 views

Can I terminate an SSL Tunnel at the Load Balancer in Amazon VPC? [migrated]

In other words, can the Amazon VPC load balancer be configured as an SSL Host? As a proof of concept, we've created this setup: Heroku Appserver <---> VPC Load Balancer <---> Ubuntu SSL ...
0
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0answers
40 views

HTTPWebRequest over SSL gives intermittent error “The request was aborted: Could not create SSL/TLS secure channel”

I am using HTTPWebRequest to connect to Java rest services hosted in Tomcat Apache server. The endpoints are configured for HTTP as well as HTTPS. There are no issues connecting to HTTP endpoints, but ...
16
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3answers
2k views

Is SHA1 weak for SSL?

I noticed that today after I scanned a site on the Qualys SSL Labs site that SSL ciphersuites which use SHA1 are now highlighted as being "Weak". It seems this has just happened; I scan sites pretty ...
0
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1answer
32 views

Does the SSL/TLS client certificate “hash over all previous messages” step hash the entire TCP packets or just data?

We have which uses TLS client certificates as it's authentication mechanism between client and server. There is an IT department which wants to run this app through a firewall/proxy device of some ...
1
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0answers
32 views

Android support for TLS 1.1

Do anybody know from what version of Android did TLS 1.1 started to be supported directly by the OpenSSL version preinstalled in the system?
1
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1answer
104 views

Apply SSL for domain that I do not own

As part of a project that my company is doing, we need to setup a development server. Let's say our company's main domain is example.com We need to be able to access the dev server through ...
1
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1answer
72 views

Authentication between two internal servers

I have two internal servers that are going to communicate with each other; they speak HTTP/TLS. Is there a best practice for authenticating communications between internal servers? Short of a best ...
2
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1answer
67 views

Does mixing different types of encryption make the connection more secure?

Like when I browse a website using SSL from my laptop that is connected to my router using WPA2. My router talks to my ISP using IPSec. Is that more secure or these types of encryption have nothing ...
1
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0answers
33 views

Is it fair to say that lack of client-authentication in TLS implies no requirement of non-repudiation?

In an https context, if a server does not send a CertificateRequest message, is there any other way it can require non-repudiation from the client?
5
votes
1answer
94 views

Are certificate authorities required to obey to the signature algorithm (hashing) specified in the CSR?

I was playing a little bit with signature algorithms, trying to determine which CAs among the ones I use are currently issuing SHA2 certificates. I generated a CSR specifying the SHA256 hash (either ...
1
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0answers
64 views

How do I force Firefox or any other browser to check for CRLs [migrated]

I am trying to see if I can watch the traffic that is sent and received when a browser checks for CRLs. All I can see with the latest version of Firefox is setting for OCSP. I dont see anything where ...
0
votes
1answer
162 views

Why is stackoverflow not using HTTPS for all it's page?

Most webpage from stackoverflow use http even if you are logged in. Isn't it a security issue? Could an eavesdropper steal my session and authentication cookie then impersonate me since it's sent ...
1
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1answer
42 views

Dump SSL traffic from a Java applet

I have a smartcard that can be read by websites using a Java applet (see http://www.springcard.com/online/applet_pcsc/). I would like to monitor and is to replay packets going from this java applet to ...
0
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1answer
47 views

HTTPS enable for proxy server or web server

Say I have 2 separated servers which are one web server (apache) and one proxy server (nginx), I want to use HTTPS for the website running on the Apache. Do I enable SSL on apache or nginx or both? ...
2
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1answer
35 views

Is distinguished subject name at normal SSL Certificate issuance must same as generated Certificate Signing Request (CSR)?

For example: from Issued SSL Certificate: CN = abc.com.my, OU = Room, O = House, c= MY from generated CSR: CN = abc.com.my, OU = Room , O = House, L = KL, ST = KL , C = MY Questions: 1. Is it ...
1
vote
1answer
121 views

What is stopping me from replaying an SSL certificate?

Say I have the SSL certificate for google.com. I intercept it, edit the certificate with my own domain name and public key and use it to intercept all traffic to google.com. What mechanisms exist in ...
1
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3answers
87 views

Not replacing SSL cert on a rebuilt, formerly rooted Unix Server

If a server was rooted, to the point that we know a Perl script which creates a remote shell was placed on the filesystem remotely, and the server was rebuilt entirely, patching the original Apache ...
2
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2answers
71 views

Will using a self-signed SSL certificate on a mail server hinder communication?

According to this ArsTechnica article, using a self-signed certificate on a mail server is a bad idea: When we set up a Web server in our previous series, getting SSL/TLS working was a ...
1
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2answers
52 views

If TLS compression is not supported is a site still vulnerable to attacks such as BREACH?

I have read that BREACH was a side channel compression attack against TLS however focuses on HTTP response compression. If a site has disabled support for TLS compression does that still mean it can ...
1
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1answer
46 views

BREACH attack and content length

I've been researching BREACH, and while I can understand how it might work if you have access to the the browser (to send crafted requests) and the wire (to capture compressed response length), I ...
20
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1answer
851 views

What is 'TLS version intolerance'

I'm trying to fully understand the report of the SSL Labs server test. Can someone explain the term 'TLS version intolerance'? I cannot find any documentation of this term, even not on the forums of ...
0
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1answer
47 views

Secure way to pass client certificate to the client2

Our product is comprised of two servers. We would like to authenticate one server to the main server by means of client certificate. I assume that we should ask the customers (who purchase the ...
0
votes
1answer
46 views

Secure communication End-to-end with android and Server

I´m building a enterprise application and I need to create a secure communication between android and a server. What is the most secure way to do End-to-End communication? Should I use HTTPS or VPN? ...
2
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2answers
127 views

How to avoid session fixation (Login CSRF) by MitM attack without HSTS?

I'm writing a web app that already uses TLS encrypted connections (HTTPS), Secure; HttpOnly session cookie, HMAC-SHA1 CSRF token, requires correct Referer header to avoid Login CSRF and changes ...
-1
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0answers
48 views

Secure way to pass client certificate to the client [duplicate]

Our product is comprised of two servers. We would like to authenticate one server to the main server by means of client certificate. I assume that we should ask the customers (who purchase the ...
-2
votes
1answer
54 views

client side and server side hash password [duplicate]

Another question about client or server side password hashing, I know. After reading many other post about this topic I'm still a little confused and not completely sure what is the best, because I ...
26
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3answers
2k views

Is there a security issue in using the same certificate for all a company's services?

We are a small startup. One of our products is a B2B web service, accessible through its https://service.example.com canonical URL. For testing purposes, that service also runs on different ...
0
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0answers
9 views

How to create .pfx file containing only one of private/public key [migrated]

As far as I know .pfx files are not required to contain both public and private key. However, I could not find a way how to create a file that contains only one of them. I need this because I am ...
0
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1answer
38 views

SSL question TLS response in TCP

After some careful looking at one .pcap of my network i would like to undestand why a request appears on the communication like IP [TLS Application Data] Application Data Protocol: http Version ...
0
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1answer
37 views

Is it possible to inject information into a clients TLS session cache?

Hypothetically speaking, could an attacker run a targeted attack on a network that would inject information into a victim's cache of recent TLS connections? Specifically, the master-key and sessionID ...
23
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3answers
3k views

For an HTTPS web application, is it worthwhile to encrypt the password before POSTing it, to keep a MITM attacker from harversting it?

Our application has recently gone through penetration testing. The test found one critical security breach, which is essentially: The problem: Attacker sets up a WiFi spot. User enters our site ...
1
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2answers
45 views

How secure are SSL client certificate authentications? [duplicate]

As far as I understand it's possible to issue SSL certificates, which could be used by clients for authentication. So in theory only users with valid certificates would be able to access a certain web ...
0
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2answers
89 views

Problem with OpenSSL rejecting CA possibly due to 12 digit Serial No

I work as a tester at a VoIP software company. We've been running into a problem with using TLS to communicate with certain phones. The phones are from different manufacturers but both exhibit the ...
1
vote
2answers
43 views

How to Secure Exchange 2010 cookie?

We have received the below finding from an IT audit. Missing Secure Attribute in Encrypted Session(SSL) Cookie: It is best business practice that any cookies that sent over (Set-cookie) an ...
4
votes
1answer
154 views

How safe can connecting to VPN really be?

I would like to make this story as short as possible since my question is not that long, I have worked with journalists previously in war zone where we investigated the involvement of EU IT companies ...
0
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0answers
40 views

CA Flag in SSL certificate [migrated]

I have an web portal running as a POC purpose, and then i have a mobile apps to access this web portal. Since it's a POC, I just generate a self-signed SSL cert and load it inside the Web and my ...
1
vote
1answer
47 views

Early ChangeCipherSpec Attack

For the early ChangeCipherSpec attack, the attack would affect client with all version of OpenSSL and server with OpenSSL version 1.0.1 and above. My question: If two mail servers are communicating ...
3
votes
2answers
203 views

Why do the banks all use weaker TLS suites? [closed]

I've been checking out various TLS certificates lately and noticed that most of the banks seem to have the following two issues: 1) They do not offer perfect forward secrecy 2) They are still using ...
23
votes
9answers
4k views

Can an HTTPS site be malicious or unsafe?

I know it's possible for a computer to be infected just by visiting a website. I also know that HTTPS websites are secure. To my understanding, "secure" here refers to "immune to MITM attacks", but ...
1
vote
1answer
54 views

How to convert SSL Certificate for mobile app?

I am in the current process of renewing my SSL cert for my website. I also have a mobile app for my site. I want to use the same cert from my website in my mobile app. How can I do this? Thanks - I ...
9
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4answers
908 views

Can ISP block HTTPS selectively? [duplicate]

Can ISP block HTTPS selectively i.e. certain websites cannot be accessed using HTTPS while others can be ?
0
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0answers
18 views

SSL Mismatched Address Certificate Error on IIS 7 [migrated]

We have a local application server (trisha0002), and on this server we have an application (FlexibleBenefits). When we install SSL for this application, it gives Mismatched Address. What can be the ...
0
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1answer
34 views

Forward Secrecy not supported with referenced browsers?

I am running a scan against one of our servers from the Qualys SSL tester site and it says that my server "does not support forward secrecy with the referenced browsers". What exactly does that mean? ...