CVE-2016-10207

TigerVNC Xvnc server vulnerability CVE-2016-10207 lets remote attackers terminate TLS handshakes to cause an invalid memory access and crash (DoS). Multiple Nessus/Gentoo/EulerOS/MiracleLinux advisories document the issue and reference related TigerVNC CVEs; affected products include TigerVNC Xvn...

OpenSSL DHE and ECDHE Parameters NULL Pointer Dereference (CVE-2017-3730)

A NULL pointer dereference vulnerability exists in OpenSSL. This vulnerability is due to the way crafted DHE and ECDHE parameters are handled by an OpenSSL client application during TLS handshake. A remote attacker could exploit this vulnerability in an OpenSSL client application, by sending...

OpenSSL 1.1.0 < 1.1.0e Vulnerability

The version of OpenSSL installed on the remote host is prior to 1.1.0e. It is, therefore, affected by a vulnerability as referenced in the 1.1.0e advisory. - During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake or vice-versa...

OpenSSL Update Fixes High Severity DoS Vulnerability

The OpenSSL Software Foundation released an update to the OpenSSL crypto library that patches a vulnerability rated high severity that could allow a remote attacker to cause a denial-of-service condition. OpenSSL released the version 1.1.0e update that fixes flaws found in OpenSSL 1.1.0, accordin...

OpenSSL Encrypt-Then-Mac Extension Denial of Service Vulnerability - Windows

OpenSSL is prone to a Denial of Service DoS vulnerability. SPDX-FileCopyrightText: 2017 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 CPE = "cpe:/a:openssl:openssl";...

Scientific Linux Security Update : openssl on SL6.x, SL7.x i386/x86_64 (20170220)

Security Fixes : - An integer underflow leading to an out of bounds read flaw was found in OpenSSL. A remote attacker could possibly use this flaw to crash a 32-bit TLS/SSL server or client using OpenSSL if it used the RC4-MD5 cipher suite. CVE-2017-3731 - A denial of service flaw was found in th...

SSL/TLS: Malformed plain-text ALERT packets could cause remote DoS

A denial of service flaw was found in the way the TLS/SSL protocol defined processing of ALERT packets during a connection handshake. A remote attacker could use this flaw to make a TLS/SSL server consume an excessive amount of CPU and fail to accept connections from other clients...

FreeBSD : openssl -- crash on handshake (1a802ba9-f444-11e6-9940-b499baebfeaf)

The OpenSSL project reports : Severity: High During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake or vice-versa then this can cause OpenSSL to crash dependent on ciphersuite. Both clients and servers are affected. This issue...

Vulnerability in OpenSSL - Encrypt-Then-Mac renegotiation crash

During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake or vice-versa then this can cause OpenSSL to crash dependent on ciphersuite. Both clients and servers are affected. Found by Joe Orton Red Hat...

openssl -- crash on handshake

The OpenSSL project reports: Severity: High During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake or vice-versa then this can cause OpenSSL to crash dependent on ciphersuite. Both clients and servers are affected. This issue do...

Cryptographic Protection Bypass

OpenSSL is vulnerable to cryptographic protection bypass. This is possible because it doesn't ensure that the PRNG is seeded before proceeding with a handshake. The flaw allows attackers to defeat the cryptographic protection mechanisms by sniffing the network then performing a brute-force attack...

Access Bypass

OpenSSL is vulnerable to access bypass. OpenSSL accepts client authentication with a Diffie-Helman certificate without receiving a CertificateValue message. This allows attacks to gain access without the knowledge of a private key via crafted TLS Handshake Protocol traffic to a server that...

Cipher Bypass

OpenSSL is vulnerable to cipher bypasses. A malicious user can negotiate and complete an SSLv2 handshake with the server even if the ciphers have been disabled on the server. SSLv2 handshakes are vulnerable to man-in-the-middle attacks...

Denial Of Service (DoS) Through Recursion

OpenSSL is vulnerable to denial of service DoS attacks. These attacks can be made using an invalid DTLS handshake causing OpenSSL to go into a recursive loop...

Denial Of Service (DoS) Through Memory Consumption

OpenSSL is vulnerable to denial of service DoS through memory consumption. This can be triggered through a DTLS handshake method which forces OpenSSL to process a large amount of data, exhausting the memory...

Denial Of Service (DoS) Through Null Pointer Dereference

OpenSSL is vulnerable to denial of service DoS attacks through a null pointer dereference. This can be triggered at remote DTLS servers by a handshake message where the ciphersuite is specified as a 1 anonymous DH or 2 anonymous ECDH ciphersuite...

CVE-2016-10207

A denial of service flaw was found in the TigerVNC's Xvnc server. A remote unauthenticated attacker could use this flaw to make Xvnc crash by terminating the TLS handshake process early...

Debian DLA-814-1 : openssl security update

Several vulnerabilities were discovered in OpenSSL : CVE-2016-7056 A local timing attack was discovered against ECDSA P-256. CVE-2016-8610 It was discovered that no limit was imposed on alert packets during an SSL handshake. CVE-2017-3731 Robert Swiecki discovered that the RC4-MD5 cipher when...

[SECURITY] [DLA 814-1] openssl security update

Package : openssl Version : 1.0.1t-1+deb7u2 CVE ID : CVE-2016-7056 CVE-2016-8610 CVE-2017-3731 Several vulnerabilities were discovered in OpenSSL: CVE-2016-7056 A local timing attack was discovered against ECDSA P-256. CVE-2016-8610 It was discovered that no limit was imposed on alert packets...

Debian DSA-3773-1 : openssl - security update

Several vulnerabilities were discovered in OpenSSL : - CVE-2016-7056 A local timing attack was discovered against ECDSA P-256. - CVE-2016-8610 It was discovered that no limit was imposed on alert packets during an SSL handshake. - CVE-2017-3731 Robert Swiecki discovered that the RC4-MD5 cipher wh...