2692 matches found
LOGJAM: TLS connections which support export grade DHE key-exchange are vulnerable to MITM attacks
A flaw was found in the way the TLS protocol composes the Diffie-Hellman exchange for both export and non-export grade cipher suites. An attacker could use this flaw to downgrade a DHE connection to use export-grade key sizes, which could then be broken by sufficient pre-computation. This can lea...
FreeBSD : mysql -- SSL Downgrade (36bd352d-299b-11e5-86ff-14dae9d210b8) (BACKRONYM)
Duo Security reports : Researchers have identified a serious vulnerability in some versions of Oracle's MySQL database product that allows an attacker to strip SSL/TLS connections of their security wrapping transparently. %NASLMINLEVEL 70300 C Tenable Network Security, Inc. The descriptive text a...
Ubuntu 14.04 LTS : NSS vulnerabilities (USN-2672-1)
The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-2672-1 advisory. Karthikeyan Bhargavan discovered that NSS incorrectly handled state transitions for the TLS state machine. If a remote attacker were able to perform a...
Ubuntu: Security Advisory (USN-2672-1)
The remote host is missing an update for the SPDX-FileCopyrightText: 2015 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...
USN-2672-1: NSS vulnerabilities
Karthikeyan Bhargavan discovered that NSS incorrectly handled state transitions for the TLS state machine. If a remote attacker were able to perform a machine-in-the-middle attack, this flaw could be exploited to skip the ServerKeyExchange message and remove the forward-secrecy property...
Mozilla Thunderbird < 38.1 Multiple Vulnerabilities (Logjam)
The version of Thunderbird installed on the remote Windows host is prior to 38.1. It is, therefore, affected by multiple vulnerabilities : - A security downgrade vulnerability exists due to a flaw in Network Security Services NSS. When a client allows for a ECDHEECDSA exchange, but the server doe...
Mozilla Thunderbird < 38.1 Multiple Vulnerabilities (Mac OS X) (Logjam)
The version of Thunderbird installed on the remote Mac OS X host is prior to 38.1. It is, therefore, affected by multiple vulnerabilities : - A security downgrade vulnerability exists due to a flaw in Network Security Services NSS. When a client allows for a ECDHEECDSA exchange, but the server do...
Firefox ESR < 38.1 Multiple Vulnerabilities (Mac OS X) (Logjam)
The version of Firefox ESR installed on the remote Mac OS X host is\ prior to 38.1. It is, therefore, affected by multiple vulnerabilities : - A security downgrade vulnerability exists due to a flaw in Network Security Services NSS. When a client allows for a ECDHEECDSA exchange, but the server...
TLS DHE_EXPORT Information Disclosure (MS15-055; CVE-2015-1716; CVE-2015-4000)
An information disclosure vulnerability exists in multiple implementations of TLS 1.2 and earlier, when Ephemeral Diffie-Hellman cipher suites including their EXPORT versions are used. It is possible to downgrade a DHE cipher to a DHEEXPORT cipher, which can be broken, and thereby perform a...
Firefox < 39.0 Multiple Vulnerabilities (Logjam)
The version of Firefox installed on the remote Windows host is prior to 39.0. It is, therefore, affected by multiple vulnerabilities : - A security downgrade vulnerability exists due to a flaw in Network Security Services NSS. When a client allows for a ECDHEECDSA exchange, but the server does no...
Firefox ESR < 38.1 Multiple Vulnerabilities (Logjam)
The version of Firefox ESR installed on the remote Windows host is prior to 38.1. It is, therefore, affected by multiple vulnerabilities : - A security downgrade vulnerability exists due to a flaw in Network Security Services NSS. When a client allows for a ECDHEECDSA exchange, but the server doe...
NSS accepts export-length DHE keys with regular DHE cipher suites — Mozilla
Security researcher Matthew Green reported a Diffie–Hellman DHE key processing issue in Network Security Services NSS where a man-in-the-middle MITM attacker can force a server to downgrade TLS connections to 512-bit export-grade cryptography by modifying client requests to include only...
HSTS Missing From HTTPS Server
The remote HTTPS server is not enforcing HTTP Strict Transport Security HSTS. HSTS is an optional response header that can be configured on the server to instruct the browser to only communicate via HTTPS. The lack of HSTS allows downgrade attacks, SSL-stripping man-in-the-middle attacks, and...
LOGJAM: TLS connections which support export grade DHE key-exchange are vulnerable to MITM attacks
A flaw was found in the way the TLS protocol composes the Diffie-Hellman exchange for both export and non-export grade cipher suites. An attacker could use this flaw to downgrade a DHE connection to use export-grade key sizes, which could then be broken by sufficient pre-computation. This can lea...
OpenSSL 1.0.1 < 1.0.1n / 1.0.2 < 1.0.2b Multiple Vulnerabilities (Logjam)
Binary data 8790.prm...
BSA-2015-1935
Security Advisory ID : BSA-2015-1935 Component : TLS protocol 1.2 Revision : 5.0 The TLS protocol 1.2 and earlier, when a DHEEXPORT ciphersuite is enabled on a server but not on a client, does not properly convey a DHEEXPORT choice, which allows man-in-the-middle attackers to conduct...
USN-2639-1: OpenSSL vulnerabilities
Praveen Kariyanahalli, Ivan Fratric and Felix Groebert discovered that OpenSSL incorrectly handled memory when buffering DTLS data. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. CVE-2014-8176 Joseph...
OpenSSL Patches Five Flaws, Adds Protection Against Logjam Attack
The OpenSSL project has patched several moderate- and low-severity security vulnerabilities and also has added protection against the Logjam attack in new releases of the software. Most of the vulnerabilities fixed in the new releases are denial-of-service bugs, but one of them can potentially...
openSUSE Security Update : zeromq (openSUSE-2015-409)
zeromq was updated to fix one security issue and two non-security bugs. The following vulnerabilities were fixed : - CVE-2014-9721: zeromq protocol downgrade attack on sockets using the ZMTP v3 protocol boo931978 The following bugs were fixed : - boo912460: avoid curve test to hang for ppc ppc64...
This POODLE Bites: Exploiting The SSL 3.0 Fallback
Introduction SSL 3.0 RFC6101 is an obsolete and insecure protocol. While for most practical purposes it has been replaced by its successors TLS 1.0 RFC2246, TLS 1.1 RFC4346, and TLS 1.2 RFC5246, many TLS implementations remain backwardscompatible with SSL 3.0 to interoperate with legacy systems ...