gnutls security update

CentOS Errata and Security Advisory CESA-2016:0012 Updated gnutls packages that fix one security issue are now available for Red Hat Enterprise Linux 6 and 7. Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System CVSS base score,...

USN-2864-1 nss vulnerability

Karthikeyan Bhargavan and Gaetan Leurent discovered that NSS incorrectly allowed MD5 to be used for TLS 1.2 connections. If a remote attacker were able to perform a machine-in-the-middle attack, this flaw could be exploited to view sensitive information...

TLS 1.2 Transcipt Collision attacks against MD5 in key exchange protocol (SLOTH)

A flaw was found in the way TLS 1.2 could use the MD5 hash function for signing ServerKeyExchange and Client Authentication packets during a TLS handshake. A man-in-the-middle attacker able to force a TLS connection to use the MD5 hash function could use this flaw to conduct collision attacks to...

UBUNTU-CVE-2015-7575

Mozilla Network Security Services NSS before 3.20.2, as used in Mozilla Firefox before 43.0.2 and Firefox ESR 38.x before 38.5.2, does not reject MD5 signatures in Server Key Exchange messages in TLS 1.2 Handshake Protocol traffic, which makes it easier for man-in-the-middle attackers to spoof...

GnuTLS Padding Oracle Information Disclosure Vulnerability

GnuTLS is a free secure communications library for implementing the SSL, TLS and DTLS protocols developed by Nikos Mavrogiannopoulos of Belgium and Simon Josefsson of Sweden, software developers. An information disclosure vulnerability exists in GnuTLS. An attacker could exploit this vulnerabilit...

OpenSSL: Certificate verify crash with missing PSS parameter

A NULL pointer dereference flaw was found in the way OpenSSL verified signatures using the RSA PSS algorithm. A remote attacker could possibly use this flaw to crash a TLS/SSL client using OpenSSL, or a TLS/SSL server using OpenSSL if it enabled client authentication...

Cisco Small Business RV Router Information Disclosure Vulnerability

The Cisco Small Business RV Series routers provide virtual private network technology remote. Cisco Small Business RV Routers 4.x, SA500 Security Appliance Version 2.2.07 random number generator fails to have effective entropy, which can allow a remote attacker to determine the TLS key pair throu...

TLS NPN Supported Protocol Enumeration

The remote host supports the TLS NPN Transport Layer Security Next Protocol Negotiation extension. This plugin enumerates the protocols the extension supports. TRUSTED...

wireshark: TLS/SSL decryption crash (wnpa-sec-2015-05)

Buffer underflow in the ssldecryptrecord function in epan/dissectors/packet-ssl-utils.c in Wireshark 1.10.x before 1.10.12 and 1.12.x before 1.12.3 allows remote attackers to cause a denial of service application crash via a crafted packet that is improperly handled during decryption of an SSL...

Microsoft Windows Schannel TLS Three Times Handshake Vulnerability

Microsoft Windows is a family of operating systems released by Microsoft Corporation in the U.S. Microsoft Schannel or Secure Channel is one of the Security Support Providers SSPs that implements the Secure Socket Layer SSL and Transport Layer Security TLS protocols and provides authentication...

The vulnerability of the Mac OS X operating system, which allows a hacker to compromise security of information.

The vulnerability of the TLS protocol implementation in the Mac OS X operating system is related to errors in the key exchange process. Exploiting this vulnerability can allow a malicious actor to compromise information security remotely...

Amazon Linux: Security Advisory (ALAS-2012-38)

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...

mysql: use of SSL/TLS can not be enforced in mysql client library (oCERT-2015-003, BACKRONYM)

It was found that the MySQL client library permitted but did not require a client to use SSL/TLS when establishing a secure connection to a MySQL server using the "--ssl" option. A man-in-the-middle attacker could use this flaw to strip the SSL/TLS protection from a connection between a client an...

NSS: incorrectly permited skipping of ServerKeyExchange (MFSA 2015-71)

It was found that NSS permitted skipping of the ServerKeyExchange packet during a handshake involving ECDHE Elliptic Curve Diffie-Hellman key Exchange. A remote attacker could use this flaw to bypass the forward-secrecy of a TLS/SSL connection...

mysql: use of SSL/TLS can not be enforced in mysql client library (oCERT-2015-003, BACKRONYM)

It was found that the MySQL client library permitted but did not require a client to use SSL/TLS when establishing a secure connection to a MySQL server using the "--ssl" option. A man-in-the-middle attacker could use this flaw to strip the SSL/TLS protection from a connection between a client an...

Denial of Service Vulnerability in Multiple EMC RSA Products

EMC RSA BSAFE Micro Edition Suite MES and others are products of EMC Corporation.EMC RSA BSAFE is a security software product that supports cryptographic algorithms, certificate chain validation, and Transport Layer Security TLS encryption suites, among other things, to help users achieve a wide...

The vulnerability of the Cisco Adaptive Security Appliance allows attackers to carry out “man-in-the-middle” attacks.

The vulnerability of the Cisco Adaptive Security Appliance’s TLS implementation is due to problems with the use of cryptography. Exploiting this vulnerability allows a malicious actor to carry out “man-in-the-middle” attacks remotely...

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...

TLS: MITM attacks via session renegotiation

The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft Internet Information Services IIS 7.0, modssl in the Apache HTTP Server 2.2.14 and earlier, OpenSSL before 0.9.8l, GnuTLS 2.8.5 and earlier, Mozilla Network Security Services NSS 3.12.4 and earlier, multiple Cis...

SSL/TLS: "Invariance Weakness" vulnerability in RC4 stream cipher

The RC4 algorithm, as used in the TLS protocol and SSL protocol, does not properly combine state data with key data during the initialization phase, which makes it easier for remote attackers to conduct plaintext-recovery attacks against the initial bytes of a stream by sniffing network traffic...