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

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1answer
11 views

Downloading list of pinned certificates

I'm thinking about implementing certificate pinning in a mobile app. The app will need to connect to several secure sites. Rather than having to update the app every time one of their certificates ...
0
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1answer
17 views

Is it bad to put a certificate as CA in Firefox?

I know I can add a self-signed certificate from a website to Firefox, but only in the CA list of it. Question: does this mean I have to ultimately trust that self-signed certificate? Can someone ...
0
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6answers
64 views

How can I allow only authorized browsers to access a website?

I have a website and I want it to be accessible only by authorized clients/browsers (ex. with a certficate). The idea is that the users can only access the webpage in their office's computers ...
2
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2answers
86 views

What prevents me from using ARP poisoning to force a client to use HTTP?

So I was just thinking about how ARP poisoning can be used to intercept a clients request, forge an SSL cert, and send it back, with the caveat of not meeting certificate validation, but what if I ...
0
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1answer
107 views

Nmap SSL service detection: How to check all open ports only for SSL service?

I am running nmap to probe services that use SSL.¹ In order to detect vulnerability in non-standard ports, I am using the -sV option to perform service discovery. But it is very slow since it runs ...
0
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0answers
17 views

error in net excess [on hold]

Incorrect certificate for host. The server presented a certificate that doesn't match built-in expectations. These expectations are included for certain, high-security websites in order to protect ...
1
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2answers
56 views

How to prevent attacks before HSTS is established for the first time? [on hold]

What is the best way to accomplish this and prevent attacks like SSL Strip?
2
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1answer
124 views

Why is the SSL handshake not shown in Wireshark?

I am trying to figure out if some Android applications with login functions are vulnerable to man in the middle attacks or not. I have set up a MITM proxy (as an attacker) on my lubuntu machine and ...
1
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1answer
60 views

Are there any “offline” open source software with I can check my HTTPS site? [on hold]

There are many sites that can rank the HTTPS quality of a website. But are there any that is open-source and can be used "offline"? So example in an intranet environment. The tool needs to check for ...
1
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2answers
15 views

Using the Synchronizer Token pattern, should you ensure the CSRF token is only communicated via HTTPS?

Put simply, CSRF tokens can be sniffed out of responses from the server unless the request/response are transmitted using encryption. Is this enough of a concern to worry about, or is it reasonable ...
0
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0answers
54 views

Squid upgrade HTTP to HTTPS [migrated]

I want to use Squid to upgrade HTTP request to HTTPS using my own certificate, in order to make clients handshake with a server (a reverse proxy) that requires mutual authentication. How can I ...
0
votes
1answer
39 views

CNN Money Portfolio and Heartbleed [duplicate]

Is/was CNN Money Portfolio ever vulnerable to heartbleed? It states 256 bit SSL bank level encryption on the website..
1
vote
1answer
44 views

IE11 on windows 8.1 and ssl fallback

I'm having problems with SSL certs and my SSL accelerator. I have a Sonicwall SSL-R and it only supports SSLv2, SSLv3, and TLS1.0. I have it configured to decode SSL with SSLv3 as the TLS1.0 ...
7
votes
1answer
75 views

How can I verify if a website revoked its old SSL certificate keys? [duplicate]

Through reading from multiple sources and watching Security Now's How the Heartbleeds, I have come to the understanding that the following procedure is recommended to be safe from the Heartbleed ...
2
votes
1answer
44 views

TestSSLServer Results

I ran TestSSLServer.exe (from http://www.bolet.org/TestSSLServer/) against a web server in my organization. The results seemed self explanatory save for one section I'm not sure how to interpret. ...
0
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0answers
31 views

How do I renew an SSL certificate correctly? [on hold]

I have an SSL certificate which is about to expire under GoDaddy. So what I did after I renewed was Generate a Keystore and CSR in Tomcat Install SSL in Tomcat The above is based on the steps ...
0
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0answers
24 views

nginx - How to prevent processing requests with undefined server names with HTTPS

How do I avoid nginx processing a request with an undefined server name using the https protocol. The following configuration makes this work for http requests: server { listen 80; ...
1
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0answers
45 views

Is Google Chrome Extension access to SSL certificate validation output possible?

I want to develop an extension which will stop an user from proceeding to any banking site (configurable by user) if a proxy like paros is seating in between sending fake certificate to user. My ...
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0answers
63 views

Heartbleed and Client Certificates [on hold]

I would like to know if there is the possibility that a server that REQUIRES some client certificate is able to respond to any type of heartbeat request. Would it would be: Hello server ...
1
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2answers
70 views

SSL cert minimize downtime key rotation strategy

As you already know, due to the heartbleed bug, we need to perform re-keying on our web servers (>10), before I do that, I want to check if my proposed strategy is a proper way or not a. Generate a ...
1
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1answer
45 views

Client authentication flaw in old Netscape SSL protocol

Below is a screenshot from the paper "Prudent Engineering Practice for Cryptographic Protocols" by Martin Abadi and Roger Needham. I can't see what's wrong with the protocol and what the fix achieves. ...
1
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4answers
222 views

Advantages of one time pad

I always hear that one time pad'ing something is so great because you won't know if you've successfully decrypted the data. I understand the idea that you can XOR any bits just the same as any other ...
0
votes
1answer
46 views

TLS sequence number

Watching at TLS 1.2 traffic using Wireshark, I figured out that in the Application Data record, the 64-bit sequence number in some connessions is sent and in others not. Does it depend on the Cipher ...
1
vote
1answer
321 views

Heartbleed detection [duplicate]

It is fairly easy to detect the heartbleed exploit if it all happens over cleartext, which it seems most things are doing for the time being. However, I believe that there are some heartbleed ...
1
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0answers
57 views

Ability to decrypt intercepted encrypted SSL traffic when having private key [duplicate]

I was reading some blog posts about the Heartbleed vulnerability (who's not nowadays) and was thinking about the following. Situation A If I would use a regular SSL/TLS connection the handshake will ...
52
votes
3answers
5k views

Heartbleed: Why does the client supply the length of the message at all?

"The fix for this bug is simple: check that the length of the message actually matches the length of the incoming request." Why do we even have the client report the length at all? If we can know ...
1
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1answer
48 views

Perplexities about TLS handshake

I analyzed the TLS (1.2) handshake and I didn't manage to understand the message after the Change Chipher Spec Here it is: It is called "Encrypted Handshake Message" by Wireshark and it is sent ...
0
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1answer
115 views

are there serious weaknesses in this free password management system?

I want to protect my passwords for free and store them on a machine that might get stolen but have the passwords very securely backed-up in the cloud, again for free, and minimize the total lifetime ...
-1
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0answers
23 views

Heartbleed & SSL Certificates - What do we do to protect ourselves as end users? [duplicate]

I seem to be hearing a lot of mixed opinions on this subject, so I figure I will turn to you guys for some advice. From my understanding, we should consider any SSL certificate (generated by openssl) ...
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votes
3answers
50 views

Does HTTPS retrieval, among its other effects, sign a document? [duplicate]

Does HTTPS retrieval, among its other effects, sign a document? I'm asking in hopes of understanding in more specific details what TLS accomplishes. I will try to elaborate my question, as follows. ...
4
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1answer
154 views

Defending against private key leaks such as those enabled by Heartbleed

More and more evidence seems to be surfacing that the Heartbleed vulnerability leaks the private key portion of the SSL certificate in use. As such this can actually mean that if an attacker was also ...
0
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2answers
68 views

Firefox can import the .p12 format, but that contains a private key? Isnt this a security risk?

Everywhere I go, people tell me the private keys need to be kept away, possibly even locked into a safe then how come Firefox and other keystores expect you to give them a private key? Firefox is a ...
0
votes
2answers
150 views

Why don't more websites implement Perfect Forward Secrecy?

From what I understand, all it takes to enable PFS on a webserver is adding ephemeral cipher suites (ones that use DHE and ECDHE for the key exchange) to the list of cipher suites used in SSL/TLS ...
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0answers
72 views

How does a hacker use the heartbleed bug? [duplicate]

So I was, reading about the new heartbleed bug, and I was really curious about how hackers actually use it. Basically, I'm wonder how someone would go about using this exploit to get information, like ...
0
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1answer
91 views

Why can't we create a new SSL implementation?

SSL implementations have been discussed a lot lately, due to Chrome's potential of switching off NSS ...
3
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1answer
201 views

Heartbleed - is this scenario possible? how bad would it be?

Let's make the following assumptions: A trusted root certificate was being served with a vulnerable version of OpenSSL. Prior to public disclosure, a malicious entity was aware of and exploited the ...
1
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1answer
44 views

How long does an HTTPS symmetric key last

As I understand it, HTTPS/SSL/TLS works by EC/DHE/RSA key exchange, providing a shared symmetric key (ie. for AES) that is used for future communications. How long is this symmetric key kept in use ...
12
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1answer
857 views

How is password stolen over non-SSL connection?

I am semi-embarrassed to ask this question having worked in the field for 20 years, but can someone describe to me why I should run SSL on any web site that uses authentication? I understand the ...
3
votes
3answers
798 views

Heartbleed - Read only the next 64k and hyping the threat

My understanding of the Heartbleed vulnerability is that there is no bounds check on the payload length/buffer size so the server can read into memory outside of its process space. But can the start ...
-1
votes
1answer
281 views

What is HeartBleed? [duplicate]

Today when I woke up , I got a email from Godaddy that contain “A critical vulnerability with OpenSSL, known as 'The Heartbleed Bug' was recently announced that could potentially impact your server“ ...
0
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0answers
58 views

how to setup apache http server with the vulnerable openssl [migrated]

Actually I just want to do some test, so I want to setup an apache http server with the vulnerable (specifically with heartbleed bug) openssl, I'd better do it from source. Does anyone know how to ...
1
vote
2answers
92 views

LastPass login security

If LastPass does not store your master password, then how can you login to use their web app? Surely you must type it in, it is sent over using SSL, and then salted/hashed on the server-side, and ...
10
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2answers
968 views

Does having 2-factor authentication help with HeartBleed?

I was talking with a friend about HeartBleed, and he mentioned that he had 2-factor authentication enabled on all the sites that supported it, so even with his username and passwords, nobody would be ...
1
vote
3answers
78 views

Is it possible to stack encryption algorithms with SSL?

SSL supports a number of ciphers, but is it possible to stack/nest the ciphers, and process the plaintext in stages? My adversary may be able to easily crack one or more of the stages, but to decode ...
2
votes
1answer
602 views

Heartbleed - Blown out of proportion? [duplicate]

From what I gather you need local memory based access correct to even access the private key? Is all this talk and worry of "Was I hacked?!" "Heartbleed just made you full hackable" ect... really over ...
1
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2answers
1k views

Does “heartbeat extension disabled” mean that the site was previously vulnerable?

One of the services I use is saying they were unaffected by heartbleed. But when I check their site with the tool at http://possible.lv/tools/hb/, this is what it says: Looking for TLS extensions on ...
1
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0answers
24 views

Question about the Perspectives add-on, is this dangerous?

When I visited Google and Facebook, and then clicked on the Perspectives add-on button to check the certificate information, I saw this:     What does this mean? Shouldn't it have ...
0
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0answers
2k views

browser extensions to show Heartbleed vulnerability? [closed]

Is there any way to use a browser extension on Firefox or Chrome that shows whether a TLS session is vulnerable to HeartBleed (server uses openssl) and whether the certificate was issued prior to the ...
56
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3answers
29k views

What clients are proven to be vulnerable to Heartbleed?

On several pages, it is re-iterated that attackers can obtain up to 64K memory from the server or client that use an OpenSSL implementation vulnerable to Heartbleed (CVE-2014-0160). There are dozens ...
1
vote
1answer
182 views

OpenSSL exploit [closed]

I have read about recent vulnerability in openssl. I tried to exploit one of my cloud servers where I run my web sites. I managed to get 64 KB of data. But what I managed to get was only HTML, CSS, ...