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

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0
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1answer
17 views

Squid upgrade HTTP to HTTPS

I want to use squid to upgrade HTTP request to HTTPS using my own certificate in order to do a client handshake with a server (a reverse proxy) that requires mutual authentication. I tried ssl-bump ...
1
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1answer
16 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 ...
6
votes
1answer
32 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 ...
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1answer
18 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
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1answer
41 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. ...
52
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4answers
19k views

Does Heartbleed mean new certificates for every SSL server?

If you haven't heard of the Heartbleed Bug, it's something to take a look at immediately. It essentially means that an attacker can exploit a vulnerability in many versions of OpenSSL to be able to ...
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0answers
29 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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3answers
276 views

TLS 1.2 Server certificate and signature_algorithms

In the specification for TLS 1.2, it says the following: If the client provided a "signature_algorithms" extension, then all certificates provided by the server MUST be signed by a hash/signature ...
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3answers
753 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 ...
3
votes
2answers
672 views

Forcing IE11 to use perfect forward secrey on AWS ELB

I can connect to my server in practically every browser except for Internet Explorer and I cannot figure out why. I am resolving SSL on AWS Elastic Load Balancer (ELB), which is configured to use the ...
0
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0answers
20 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; ...
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0answers
50 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 ...
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0answers
30 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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2answers
287 views

Self-signed SSL certificate on chromebook (and android)

I am having the following problem on both my android phone and on my chromebook. I'm running a website on an internal server (10.3.3.3) using nginx with a self-signed ssl certificate. Since it is just ...
1
vote
4answers
218 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 ...
1
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2answers
56 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 ...
4
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1answer
147 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 ...
1
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1answer
44 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. ...
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4answers
396 views

nginx recommended ssl_ciphers for security, compatibility - with PFS

I'm currently using nginx with the following ciphers: ssl_ciphers HIGH:!aNULL:!eNULL:!LOW:!ADH:!RC4:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS; I would like to maintain compatibility to older ...
2
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1answer
119 views

How widely is Perfect Forward Secrecy in HTTPS clients?

We are hosting an SaaS website and API with the https protocol, both of which are accessed by numerous users with a lot of different browsers and client-side apps. What would happen if I made PFS ...
4
votes
1answer
347 views

PFS on nginx: only RC4 gets used (TLS_ECDHE_RSA_WITH_RC4_128_SHA)

I'm trying to configure my webserver for perfect forward secrecy. I'm using ssl_ciphers ...
1
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1answer
260 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 ...
24
votes
10answers
821 views

Does hashing a file from an unsigned website give a false sense of security?

Consider this. Many websites with software downloads also make available MD5 or SHA1 hashes, for users to verify the integrity of the downloaded files. However, few of these sites actually use HTTPS ...
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3answers
4k 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 ...
0
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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 ...
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votes
0answers
71 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 ...
18
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3answers
3k views

Why does TLS need an explicit heartbeat protocol?

The heartbeat extension to the TLS protocol seems like a useful idea for DTLS; according to the specification itself, it can be used to find out if a peer is still alive (and prevent firewalls from ...
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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 ...
34
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6answers
2k views

Why is HTTPS not the default protocol?

Why is HTTP still commonly used, instead what I would believe much more secure HTTPS?
1
vote
1answer
46 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 ...
1
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1answer
55 views

What's the use of certificate on Load Balancer and Keystore on Service?

Consider a scenario where my service is using a keystore made of self signed cerificate and the load balancer which is balancing traffic for service is binded with a CA approved certificate. I would ...
14
votes
4answers
12k views

Why don't major browsers currently support TLS above version 1.0?

TLS 1.0 seem to be vulnerable to Beast, Lucky13 and maybe other attacks and is simply outdated. Common workaround used e.g. by Google was to use RC4 which was also recently broken, but none of the ...
2
votes
1answer
66 views

Which Browsers support TACK?

TACK is an IETF draft that allows certificate pinning for a TLS web server, provided the clients' bowsers support it. Unlike the certificate pinning feature available with HSTS preloading, the ...
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1answer
107 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 ...
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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. ...
2
votes
2answers
740 views

Exploiting HTTP content in HTTPS page [closed]

I recall hearing there is a range of attacks one can mount against a page which mixes HTTP and HTTPS loaded content (say, https://Secure-Site.com loading an image from http://Not-A-Secure-Site.com) ...
2
votes
2answers
93 views

What is the point of certification authorities that are not trusted by browsers (=trusted by Root CAs)?

See here: https://www.cacert.org/index.php?id=1 Chrome, Firefox and Internet Explorer warn that it is not trusted, essentially making the entire thing useless. If I want some kind of ssl certificate, ...
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2answers
66 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
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2answers
136 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 ...
1
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2answers
90 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 ...
11
votes
1answer
831 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 ...
4
votes
3answers
1k views

HeartBleed - How to detect compromised websites

Is there a way to determine as an end-user which HTTPS sites use OpenSSL? Due to heartbleed it is recommended that clients change their passwords that were sent over TLS recently as private keys may ...
16
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8answers
2k views

Should a site have SSL if it doesn't have a login form?

We have a site at work that is used for the following: Our homepage, which is just some info and contact info. Job applications are also handled on our site. There is no place where you can login ...
1
vote
1answer
42 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 ...
0
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1answer
90 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
votes
1answer
199 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 ...
9
votes
2answers
854 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 ...
4
votes
2answers
412 views

Single domain SSL certificates, actually support 2 subdomains?

While browsing for SSL certificates, specifically domain validation type (the cheapest), I noticed that they advertise as valid for a single domain/subdomain, but then I noticed that they are valid ...
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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 ...