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New Raccoon Attack Could Let Attackers Break SSL/TLS Encryption

New Raccoon Attack Could Let Attackers Break SSL/TLS Encryption
Sep 10, 2020
A group of researchers has detailed a new timing vulnerability in Transport Layer Security (TLS) protocol that could potentially allow an attacker to break the encryption and read sensitive communication under specific conditions. Dubbed " Raccoon Attack ," the server-side attack exploits a side-channel in the cryptographic protocol (versions 1.2 and lower) to extract the shared secret key used for secure communications between two parties. "The root cause for this side channel is that the TLS standard encourages non-constant-time processing of the DH secret," the researchers explained their findings in a paper. "If the server reuses ephemeral keys, this side channel may allow an attacker to recover the premaster secret by solving an instance of the Hidden Number Problem." However, the academics stated that the vulnerability is hard to exploit and relies on very precise timing measurements and on a specific server configuration to be exploitable.

Facebook Open Sources Fizz — TLS 1.3 Library For Speed and Security

Facebook Open Sources Fizz — TLS 1.3 Library For Speed and Security
Aug 07, 2018
Facebook has open sourced Fizz—a library designed to help developers implement TLS 1.3 protocol with all recommended security and performance related configurations. Since late last month, Google Chrome web browser has started marking all non-HTTPS websites as 'Not Secure' in an effort to make the web a more secure place, forcing website administrators to switch to HTTPS. TLS 1.3 is the newest and most secure cryptographic protocol of the Transportation Layer Security (TLS), the successor to Secure Sockets Layer (SSL), which encrypts data in transit between clients and servers to prevent data theft or tampering. To make internet traffic more secure, TLS 1.3 incorporates several new features like encrypting handshake messages to keep certificates private, redesigning the way secret keys are derived, and a zero round-trip (0-RTT) connection setup, making certain requests faster than TLS 1.2. Written in C++ 14, Fizz is a reliable and highly performant TLS library that

The Drop in Ransomware Attacks in 2024 and What it Means

The Drop in Ransomware Attacks in 2024 and What it Means
Apr 08, 2024Ransomware / Cybercrime
The  ransomware industry surged in 2023  as it saw an alarming 55.5% increase in victims worldwide, reaching a staggering 5,070.  But 2024 is starting off showing a very different picture.  While the numbers skyrocketed in Q4 2023 with 1309 cases, in Q1 2024, the ransomware industry was down to 1,048 cases. This is a 22% decrease in ransomware attacks compared to Q4 2023. Figure 1: Victims per quarter There could be several reasons for this significant drop.  Reason 1: The Law Enforcement Intervention Firstly, law enforcement has upped the ante in 2024 with actions against both LockBit and ALPHV. The LockBit Arrests In February, an international operation named "Operation Cronos" culminated in the arrest of at least three associates of the infamous LockBit ransomware syndicate in Poland and Ukraine.  Law enforcement from multiple countries collaborated to take down LockBit's infrastructure. This included seizing their dark web domains and gaining access to their backend sys

Critical GnuTLS Flaw Leaves SSL Clients Vulnerable to Remote Code Execution

Critical GnuTLS Flaw Leaves SSL Clients Vulnerable to Remote Code Execution
Jun 04, 2014
GnuTLS, a widely used open source SSL/TLS cryptographic library is vulnerable to a buffer overflow vulnerability that could be exploited to crash TLS clients or potentially execute malicious code on underlying systems. The GnuTLS library implements secure sockets layer (SSL) and transport layer security (TLS) protocols on computers, servers, and softwares to provide encrypted communications over insecure channels. The bug ( CVE-2014-3466 ) was independently discovered by Joonas Kuorilehto of security firm Codenomicon, the same security firm who discovered the biggest Internet vulnerability, Heartbleed. Unlike Heartbleed, the GnuTLS library is not as widely deployed as OpenSSL. The GnuTLS Vulnerability resides in the way GnuTLS parses the session ID from the server response during a TLS handshake. It does not check the length of session ID value in the ServerHello message, which allows a malicious server to send an excessively long value in order to execute buffer overf

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