OpenSSL Key Recovery Attack on DH small subgroups (CVE-2016-0701)

Usual Mandatory Disclaimer: IANAC I am not a cryptographer so I might likely end up writing a bunch of mistakes in this blog post... tl;dr The OpenSSL 1.0.2 releases suffer from a Key Recovery Attack on DH small subgroups. This issue got assigned CVE-2016-0701 with a severity of High and OpenSSL...

Vulnerability in OpenSSL - DH small subgroups

Historically OpenSSL usually only ever generated DH parameters based on “safe” primes. More recently in version 1.0.2 support was provided for generating X9.42 style parameter files such as those required for RFC 5114 support. The primes used in such files may not be “safe”. Where an application ...

SUSE SLES11 Security Update : OpenSSL (SUSE-SU-2015:1184-2) (Logjam)

OpenSSL 0.9.8j was updated to fix several security issues. CVE-2015-4000: The Logjam Attack weakdh.org has been addressed by rejecting connections with DH parameters shorter than 1024 bits. We now also generate 2048-bit DH parameters by default. CVE-2015-1788: Malformed ECParameters could cause a...

SUSE SLED11 / SLES11 Security Update : OpenSSL (SUSE-SU-2015:1182-2) (Logjam)

OpenSSL 0.9.8k was updated to fix several security issues : CVE-2015-4000: The Logjam Attack weakdh.org has been addressed by rejecting connections with DH parameters shorter than 1024 bits. 2048-bit DH parameters are now generated by default. CVE-2015-1788: Malformed ECParameters could cause an...

SUSE SLES11 Security Update : OpenSSL (SUSE-SU-2015:1184-1) (Logjam)

OpenSSL 0.9.8j was updated to fix several security issues. CVE-2015-4000: The Logjam Attack weakdh.org has been addressed by rejecting connections with DH parameters shorter than 1024 bits. We now also generate 2048-bit DH parameters by default. CVE-2015-1788: Malformed ECParameters could cause a...

SUSE-SU-2015:1150-1 Security update for compat-openssl098

This update fixes the following security issues: - CVE-2015-4000 boo931698 The Logjam Attack / weakdh.org reject connections with DH parameters shorter than 1024 bits generates 2048-bit DH parameters by default - CVE-2015-1788 boo934487 Malformed ECParameters causes infinite loop - CVE-2015-1789...

USN-2547-1: Mono vulnerabilities

It was discovered that the Mono TLS implementation was vulnerable to the SKIP-TLS vulnerability. A remote attacker could possibly use this issue to perform client impersonation attacks. CVE-2015-2318 It was discovered that the Mono TLS implementation was vulnerable to the FREAK vulnerability. A...

Mobile Android, iOS Apps Still Vulnerable to FREAK Attacks

In the shadow of a major OpenSSL vulnerability scheduled to be announced tomorrow, lingering issues remain with mobile platforms and applications that still run versions of the crypto library vulnerable to FREAK attacks. A report published Tuesday by FireEye paints a bleak picture of vulnerable...

Internet Bug Bounty: FREAK: Factoring RSA_EXPORT Keys to Impersonate TLS Servers

Many TLS servers, including those hosting sensitive websites such as www.nsa.gov and connect.facebook.net, support weak EXPORTRSA ciphersuites. By factoring their 512-bit ephemeral RSA keys, a network attacker is able to impersonate these websites to web browsers and more generally, to client...

SuSE 11.3 Security Update : OpenSSL (SAT Patch Number 10150)

OpenSSL has been updated to fix various security issues. More information can be found in the OpenSSL advisory: http://openssl.org/news/secadv20150108.txt . The following issues have been fixed : - Bignum squaring BNsqr may produce incorrect results on some platforms, including x8664. bsc912296...

openssl: only allow ephemeral RSA keys in export ciphersuites (FREAK)

It was discovered that OpenSSL would accept ephemeral RSA keys when using non-export RSA cipher suites. A malicious server could make a TLS/SSL client using OpenSSL use a weaker key exchange method...

openssl security update

1.0.1e-34.7 - fix CVE-2014-3570 - incorrect computation in BNsqr - fix CVE-2014-3571 - possible crash in dtls1getrecord - fix CVE-2014-3572 - possible downgrade of ECDH ciphersuite to non-PFS state - fix CVE-2014-8275 - various certificate fingerprint issues - fix CVE-2015-0204 - remove support f...

CVE-2014-0351

The FortiManager protocol service in Fortinet FortiOS before 4.3.16 and 5.x before 5.0.8 on FortiGate devices does not prevent use of anonymous ciphersuites, which makes it easier for man-in-the-middle attackers to obtain sensitive information or interfere with communications by modifying the...

Design/Logic Flaw

The FortiManager protocol service in Fortinet FortiOS before 4.3.16 and 5.x before 5.0.8 on FortiGate devices does not prevent use of anonymous ciphersuites, which makes it easier for man-in-the-middle attackers to obtain sensitive information or interfere with communications by modifying the...

CVE-2014-0351

The FortiManager protocol service in Fortinet FortiOS before 4.3.16 and 5.x before 5.0.8 on FortiGate devices does not prevent use of anonymous ciphersuites, which makes it easier for man-in-the-middle attackers to obtain sensitive information or interfere with communications by modifying the...

Ubuntu 10.04 LTS : openssl vulnerabilities (USN-2232-4)

USN-2232-1 fixed vulnerabilities in OpenSSL. One of the patch backports for Ubuntu 10.04 LTS caused a regression for certain applications. This update fixes the problem. We apologize for the inconvenience. Juri Aedla discovered that OpenSSL incorrectly handled invalid DTLS fragments. A remote...

USN-2232-4: OpenSSL regression

USN-2232-1 fixed vulnerabilities in OpenSSL. One of the patch backports for Ubuntu 10.04 LTS caused a regression for certain applications. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Jüri Aedla discovered that OpenSSL incorrectly handled invalid...

DEBIAN-CVE-2014-3510

The ssl3sendclientkeyexchange function in s3clnt.c in OpenSSL 0.9.8 before 0.9.8zb, 1.0.0 before 1.0.0n, and 1.0.1 before 1.0.1i allows remote DTLS servers to cause a denial of service NULL pointer dereference and client application crash via a crafted handshake message in conjunction with a 1...

Updated polarssl packages fix security vulnerability

A flaw was discovered in PolarSSL, a lightweight crypto and SSL/TLS library, which can be exploited by a remote unauthenticated attacker to mount a denial of service against PolarSSL servers that offer GCM ciphersuites. Potentially clients are affected too if a malicious server decides to execute...

MGASA-2014-0315 Updated polarssl packages fix security vulnerability

A flaw was discovered in PolarSSL, a lightweight crypto and SSL/TLS library, which can be exploited by a remote unauthenticated attacker to mount a denial of service against PolarSSL servers that offer GCM ciphersuites. Potentially clients are affected too if a malicious server decides to execute...