OpenSSL improper handling of Change Cipher Spec message

Overview OpenSSL improperly handles Change Cipher Spec message in the initial SSL/TLS handshake. OpenSSL contains a flaw in the implementation of the Change Cipher Spec protocol that allows a MITM man-in-the-middle attacker to force a server and a client to use easily guessable cryptgraphic key...

CVE-2014-3470

The ssl3sendclientkeyexchange function in s3clnt.c in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h, when an anonymous ECDH cipher suite is used, allows remote attackers to cause a denial of service NULL pointer dereference and client crash by triggering a NULL certificate...

DEBIAN-CVE-2014-0224

OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly restrict processing of ChangeCipherSpec messages, which allows man-in-the-middle attackers to trigger use of a zero-length master key in certain OpenSSL-to-OpenSSL communications, and consequently hijack sessio...

CVE-2014-3470

The ssl3sendclientkeyexchange function in s3clnt.c in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h, when an anonymous ECDH cipher suite is used, allows remote attackers to cause a denial of service NULL pointer dereference and client crash by triggering a NULL certificate...

UBUNTU-CVE-2014-3470

The ssl3sendclientkeyexchange function in s3clnt.c in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h, when an anonymous ECDH cipher suite is used, allows remote attackers to cause a denial of service NULL pointer dereference and client crash by triggering a NULL certificate...

UBUNTU-CVE-2014-0224

OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly restrict processing of ChangeCipherSpec messages, which allows man-in-the-middle attackers to trigger use of a zero-length master key in certain OpenSSL-to-OpenSSL communications, and consequently hijack sessio...

CVE-2014-3470

The ssl3sendclientkeyexchange function in s3clnt.c in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h, when an anonymous ECDH cipher suite is used, allows remote attackers to cause a denial of service NULL pointer dereference and client crash by triggering a NULL certificate...

OpenSSL Server-Side ChangeCipherSpec Injection Scanner

This module checks for the OpenSSL ChangeCipherSpec CCS Injection vulnerability. The problem exists in the handling of early CCS messages during session negotiation. Vulnerable installations of OpenSSL accepts them, while later implementations do not. If successful, an attacker can leverage this...

TLS Servers Cipher Suites Vulnerability Scanning Tools

Several vulnerability scanning tools are designed to gather supported cipher suites information from TLS servers. Such scans might indicate an attempt to disclose information about a server, as a preparation for an attack...

[oss-security] A number of EncFS issues

Hi, https://defuse.ca/audits/encfs.htm discusses a number of issues in EncFS: "Same Key Used for Encryption and Authentication" "Stream Cipher Used to Encrypt Last File Block" "Generating Block IV by XORing Block Number" "File Holes are Not Authenticated" "MACs Not Compared in Constant Time"...

SMTP STARTTLS Deployments Better than Expected

As more service providers understand and embrace the importance of encrypting online communication, certain technologies are being elevated to the forefront of conversations. Perfect Forward Secrecy and HTTP Strict Transport Security HSTS are two that generally top most lists, but another, SMTP...

SSL/TLS: Report Perfect Forward Secrecy (PFS) Cipher Suites

This routine reports all SSL/TLS cipher suites accepted by a service which are supporting Perfect Forward Secrecy PFS. SPDX-FileCopyrightText: 2014 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders...

TLS Invalid Cipher Suites Denial of Service

A denial of service vulnerability has been reported in servers using TLS protocol. The vulnerability is due to the server's inability to handle Invalid TLS cipher suites. Remote attackers can exploit this issue by sending specially crafted cipher suites to an affected server...

Google Changes Ciphers in Chrome on Android

The emergence of mobile platforms such as iOS and Android have presented a number of challenges in terms of security. Not much can be done about some of these, like users leaving their phones in bars. But engineers at Google have been working on one of the thornier ones of late–how to provide sol...

mRemote Offline Password Decrypt

mRemote Offline Password Decrypt Based on Metasploit Module enummremotepwds.rb from David Maloney Autor: Adriano Marcio Monteiro E-mail: [email protected] Blog: adrianomarciomonteiro.blogspot.com.br Usage: ruby mRemoteOffPwdsDecrypt.rb confCons.xml require 'rexml/document' require...

Cryptanalysis Remains for TrueCrypt Audit

Phase two of the TrueCrypt audit figures to be a labor-intensive, largely manual cryptanalysis, according to the two experts behind the Open Crypto Audit Project OCAP. Matthew Green, crypto expert and professor at Johns Hopkins University, said a small team of experts will have to, by hand, exami...

AIX OpenSSL Advisory : openssl_advisory3.asc

The version of OpenSSL running on the remote host is affected by the following vulnerabilities : - The DTLS implementation in OpenSSL before 0.9.8s and 1.x before 1.0.0f performs a MAC check only if certain padding is valid, which makes it easier for remote attackers to recover plaintext via a...

AIX OpenSSL Advisory : openssl_advisory2.asc

The version of OpenSSL running on the remote host is affected by the following vulnerabilities : - ssl/t1lib.c in OpenSSL 0.9.8h through 0.9.8q and 1.0.0 through 1.0.0c allows remote attackers to cause a denial of service crash, and possibly obtain sensitive information in applications that use...

TrueCrypt is Secure; Encryption Tool cleared the First Phase of Security Audit

Is TrueCrypt Audited Yet? Yes, In Part! One of the world's most-used open source file encryption software trusted by tens of millions of users - TrueCrypt is being audited by a team of experts to assess if it could be easily exploited and cracked. Hopefully it has cleared the first phase of the...

bouncycastle: TLS CBC padding timing attack

It was discovered that bouncycastle leaked timing information when decrypting TLS/SSL protocol encrypted records when CBC-mode cipher suites were used. A remote attacker could possibly use this flaw to retrieve plain text from the encrypted packets by using a TLS/SSL server as a padding oracle...