OpenSSL is an open-source implementation of the SSL and TLS protocols.

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Heartbleed check for mobile and mobile apps

I have run a heartbleed detector from Lookout on my Android phone. It says: The version of openSSL is affected by the heartbleed bug but the vulnerable behaviour is not enabled. What does it ...
2
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2answers
1k views

Does CVE-2014-0195 affect HTTPS?

Does CVE-2014-0195 (openSSL) affect HTTPS or only VPN tunnels? Reference: https://security-tracker.debian.org/tracker/DSA-2950-1, https://isc.sans.edu/
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2answers
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Which browsers are using openssl

It is asked in stackoverflow, but I suppose maybe it is more suitable to ask here. It is said that openssl are widely used, however, as far as I know, the most popular browsers seem not use openssl, ...
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4answers
247 views

What's the need of multiple implementations of SSL/TLS? [closed]

I've been reading about SSL/TLS and I was surprised when I saw the amount SSL/TLS implementations that exist. wikipedia. So, is there really a need for all these different implementations? Wouldn't ...
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3answers
82 views

OpenSSL encrypting small packets bandwidth overhead

I have an c/c++ program used for encrypting data for communicating between two ends. Encryption is done using OpenSSL (0.9.8d-fips, Sep 2006). Think it'll be worthy to mention that I'm not much ...
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3answers
127 views

What part of the CSR is hashed in order to create its signature?

I'd like to change the CSR before it is transferred to the CA without going through the CSR creation process again. To do that I need to know how to calculate the signature of the CSR after I modified ...
2
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2answers
102 views

OpenSSL SSL enabled client application, server verification?

I am writing an OpenSSL SSL enabled client application which connects to a Google server. I have the SSL working and I can monitor the traffic and see that it is definitely encrypted. I am using ...
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2answers
96 views

How to compare encrypted private keys?

Is it possible to compare encrypted private keys if you do not have the passphrase? E.g.: openssl genrsa -out unencryptedprivkey.pem 2048 openssl rsa -in unencryptedprivkey.pem -aes128 -out ...
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1answer
86 views

Which default encryption does openSSL use?

If I create a private key via: openssl req -x509 -newkey rsa:2048 -out cert.crt then openssl writes the private key to the file privkey.pem and if you do not provide the "-nodes" command it will ...
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1answer
502 views

Why does openssl enc -aes-256-cbc -a -salt increase the file size?

I'm using openssl enc -aes-256-cbc -a -salt for automated differential backups to Amazon Glacier. But I noticed that using this command increases the file size almost perfectly by 35%. In my ...
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1answer
628 views

Verify Certificate is revoked by CRL

I set up a CA and signed some cert request. I revoke them by: openssl ca -config config.cnf -revoke cert.pem I update CRL by: openssl ca -config config.cnf -gencrl -out crl/crl.pem ...
2
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1answer
59 views

Does RAND_add(&Time,sizeof(Time),0) at each ssl connect reduce randomness or not?

Reviewing openssl 1.0.1g s23_clnt.c code i see that : int ssl23_connect(SSL *s) { BUF_MEM *buf=NULL; unsigned long Time=(unsigned long)time(NULL); void (*cb)(const SSL *ssl,int ...
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2answers
49 views

Own attributes openssl

Is there a way to include my own attributes into an openssl certificate? e.g ... Country Name (2 letter code) [GB]: State or Province Name (full name) [State]: Locality Name (eg, city) [City]: ...
1
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1answer
237 views

Generating ECDSA certificate and private key in one step

Similar to how it can be easily done for RSA: openssl req -x509 -nodes -newkey rsa:2048 -rand /dev/urandom -keyout example.key -out example.crt -days 365 I'd like to generate a ECDSA cert/key in ...
2
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1answer
223 views

“global” OCSP with Apache mod_ssl / Alternative to -VAfile option Openssl

Context I'm developping my own OCSP responder which signed its ocsp responses with its own self signed certificate caOcspBC.crt. You can find it here : https://github.com/Dinou/ocspResponder I want ...
1
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1answer
325 views

Why do I need to install the startcom intermediate certificate?

I issued my server a Startcom class 1 cert. With no changes on the client, I can access this server via FF without issue. However, when try to validate the certificate via openssl s_client it chokes ...
0
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1answer
116 views

Openssl ciphers SHA384 and AEAD

When running the command: openssl ciphers -v I get a long list of cipher combinations. I'm having issues interpreting some of them. An example is: DHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=DH Au=RSA ...
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1answer
846 views

Why is the deprecated SSL 2.0 protocol considered insecure and how can it be exploited?

I am making a presentation to the class about "SSL 2.0 deprecated protocol" and I really have no idea how this exploit is used or how the attacker can use this vul. I understand the impact of this ...
2
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1answer
65 views

DTLS Session Keys life time

I have a UDP client application that is long-lived: Ideally, it keeps streaming to a server forever. I'm using Datagram Transport Layer Security (DTLS) to secure the UDP communication. How often ...
4
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1answer
479 views

Determine if private key belongs to certificate?

Given a certificate¹ and a private key file², how can I determine if the public key on the certificate matches the private key? My initial thought was to simply encrypt some text with the public key ...
2
votes
1answer
100 views

Is the following code seeding OpenSSL's PRNG necessary, superfluous, or harmful?

As I was going through Crypt::SSLeay, preparing it for the next release, I noticed the following code, written way before my time, ... int rand_bytes_read; static int bNotFirstTime; char buf[ 1024 ...
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0answers
110 views

Ruby OpenSSL vs Linux openssl

I have a difficulty reconciling Ruby's OpenSSL library with the standard Linux command line openssl. What I'm trying to do here is encrypt the string mysecretstring with the password foobar but first ...
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0answers
388 views

OpenSSL: Bad Record MAC on TLS Heart Beat

I am trying to see the heartbleed bug in action with my OpenSSL server application. My server uses the OpenSSL library - openssl-1.0.1b I successfully connect with s_client (openssl-1.0.1b) to my ...
5
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1answer
443 views

What are the OpenSSL standard Diffie Hellmann parameters (primes)?

I recently generated some custom Diffie Hellmann parameters which are basically just long (in the below case 4096 bit) primes. Those are then used in the key exchange process. I used the following ...
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9answers
436 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 ...
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2answers
76 views

openssl aes 256 cbc strange bug

This is extremely strange but I have already tried this twice and am completely sure it is openSSL and not me doing the bug. I am encrypting the data 'Hygiene' with the password '*' (sorry can't tell ...
3
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1answer
176 views

OpenSSL Code Review

Is there to be a review in the code of OpenSSL any time in the near future? It seems OpenBSD is doing a controversial one, in that the review is also "Ripping out some windows-specific cruft". But is ...
2
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1answer
149 views

How to sign data with OpenSSL 0.9.8?

I am building a license generator for nodejs and I am currently testing on Heroku. On my local machine running OpenSSL 1.0.1g, I'm able to test my key pairs (sign and verify) like this: # data.txt's ...
2
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2answers
163 views

Would usage of jCryption 3.0 + SSL have mitigated the Heartbleed vulnerability?

I came across a project called jCryption 3.0, which encrypts data between the client and server, without using SSL. If a website's JavaScript had used jCryption 3.0 to encrypt login form fields before ...
2
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1answer
149 views

what are the current best practices for key generation

What is the difference between these openssl commands: "openssl genrsa" "openssl genpkey" "openssl req -newkey rsa:bits [everything else]" Which one should I be using when preparing a new CSR?
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3answers
92 views

Multi-tenancy and Heartbleed

We use a well-known service provider/API management gateway that sits in front of our RESTful APIs providing key management functionality etc. etc. The service provider was running the dodgy OpenSSL ...
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2answers
284 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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2answers
300 views

Is crypto.js vulnerable to heartbleed attack? [duplicate]

We are using 'crypto.js' in our application. Since 'crypto.js' uses open SSL ,are we vulnerable to heartbleeding attack? If yes, what can we do to prevent it?
1
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1answer
393 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 ...
58
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3answers
6k 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 ...
3
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2answers
200 views

Heartbleed and heap management - Why user data and passwords are kept in memory?

If I understand correctly the hearbleed vulnerability, only the heap of the OpenSSL process can be retrieved by an attacker (or part of depending on the memory allocation type that is used). Then, how ...
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3answers
110 views

When given a SSL-Private-Key, how would one generate a valid SSL-Cert from this? [duplicate]

in the hybris of leaked ssl-private-key everybody cries for new certs and new keys. my question: how would one generate a new and valid ssl-cert with the private key from my website? our certs are ...
0
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1answer
79 views

Will the recently found OpenSSL vulnerability Heartbleed affect my public site for which I obtained an SSL certificate from a CA? [duplicate]

I had generated the CSR with OpenSSL. Do I need to regenerate a new CSR with no vulnerability due to OpenSSL in order to obtain a new certificate from a CA?
5
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2answers
394 views

How secure is OpenSSH on FreeBSD?

In a discussion about the recent OpenSSL information disclosure vulnerability, the subject of OpenSSH being vulnerable came up. While OpenSSH is not vulnerable due to the problem lying in the TLS ...
0
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1answer
37 views

problem upgrading openssl on ubuntu servers [closed]

I'm running Ubuntu x86_64, and want to upgrade to OpenSSL 1.0.1.f. wget <openssl latest> tar -xzvf openssl.tar.gz cd <openssl dir> ./configure --prefix=/usr make In the console output, ...
1
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1answer
464 views

How to verify OpenSSL's Heartbleed patch is the correct one?

In hearing about the Heartbleed vulnerability, I went to https://www.openssl.org/source/ to download the latest patch, but was quite surprised to find that the security certificate for that site has ...
2
votes
1answer
131 views

HeartBleed ReKeyed Cert with old creation date

the lastpass.com/heartbleed tool states that my server is most likely vulnerable and that users should wait untill my cert has been replaced. It seems that they check for certificate creation date, ...
0
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2answers
368 views

How can I confirm that my server is protected against HeartBleed? [duplicate]

I just got a software update openssl-1.0.1e-37. I believe it is a patch for HeartBleed. Given that it was widely reported that versions up to 1.0.1f are vulnerable, how can I verify this patch on my ...
0
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0answers
16 views

Heartbleed - impact on iOS apps? [duplicate]

Just heard about the heartbleed news over the internet for OpenSSL and wondering if it affects ios apps as well. My app uses openssl crypto library and thus the concern ! Any views in this regard ...
0
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1answer
200 views

The Problem with Changing All Passwords for HeartBleed [duplicate]

One thing that's been bugging me in relation to the discovery of the Heartbleed OpenSSL flaw is the recommendation that everyone should run to their computers in a panic and change all of their ...
3
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3answers
953 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 ...
0
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1answer
150 views

Doesn't the Heart Bleed vulnerability imply that we need to change passwords for *all* systems? [duplicate]

I understand the part about a server with the vulnerability. But from what I gather, the vulnerability has also existed in browsers that use the vulnerable OpenSSL implementations. So, if I first ...
5
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1answer
3k views

OpenSSL Heartbeat (Heartbleed bug) - what's the payload used for? [duplicate]

So the heartbeat bug can lead to memory read overrun, exposing (parts of) the process memory, because it reads the payload when there actually is no (or less) payload. But what do you need a payload ...
192
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11answers
30k views

How to explain Heartbleed without technical terms?

Most of my friends who are not experienced in computers want to know what Heartbleed is and how it works. How would one explain Heartbleed to someone without a technical background?
5
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4answers
2k views

Heartbleed: OpenSSL v 0.9.8o and OpenVPN v 2.1.3 Reporting Vulnerable

According to the OpenSSL project the version in use on a server we control is not vulnerable: 0.9.8o. According to OpenVPN v 2.1.3 is also not vulnerable (also in use). These are running on Debian ...