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New Raccoon Attack Could Let Attackers Break SSL/TLS Encryption

New Raccoon Attack Could Let Attackers Break SSL/TLS Encryption

September 10, 2020Ravie Lakshmanan
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.
Cynet Takes Cyber Threat Protection Automation to the Next Level with Incident Engine

Cynet Takes Cyber Threat Protection Automation to the Next Level with Incident Engine

September 09, 2020The Hacker News
We have all heard of the "cybersecurity skills gap" — firms' inability to hire and retain high-level cybersecurity talent. I see this gap manifesting in two ways. First, companies that want to hire cybersecurity talent simply cannot find candidates with sufficient skills. Second, companies that cannot afford specialized cybersecurity talent and therefore lack the necessary skills to adequately protect their organizations from the growing and increasingly sophisticated cyber threats. Both of these are real problems, and both can lead to devastating consequences. It's also fair to say that most cybersecurity teams today are overworked and understaffed. One of the primary reasons we need such high-level cybersecurity skills lies in the shortcomings of cybersecurity technologies. Due to the changing and increasingly sophisticated stream of attack techniques, the breadth and depth of cybersecurity defensive technologies used to combat these threats and protect org
Cybercriminals Are Using Legit Cloud Monitoring Tools As Backdoor

Cybercriminals Are Using Legit Cloud Monitoring Tools As Backdoor

September 09, 2020Ravie Lakshmanan
A cybercrime group that has previously struck Docker and Kubernetes cloud environments has evolved to repurpose genuine cloud monitoring tools as a backdoor to carry out malicious attacks, according to new research. "To our knowledge, this is the first time attackers have been caught using legitimate third party software to target cloud infrastructure," Israeli cybersecurity firm Intezer said in a Tuesday analysis. Using software called Weave Scope , which is used as a visualization and monitoring tool for Docker and Kubernetes services, the TeamTNT threat actor not only mapped the cloud environment of their victims but also executed system commands without having to deploy malicious code on the target server explicitly. TeamTNT has been active at least since late April this year, directing their attacks on misconfigured Docker ports to install a cryptocurrency mining malware and a Distributed Denial-of-Service (DDoS) bot. Then last month , the crypto-mining gan
Microsoft Releases September 2020 Security Patches For 129 Flaws

Microsoft Releases September 2020 Security Patches For 129 Flaws

September 08, 2020Swati Khandelwal
As part of this month's Patch Tuesday, Microsoft today released a fresh batch of security updates to fix a total of 129 newly discovered security vulnerabilities affecting various versions of its Windows operating systems and related software. Of the 129 bugs spanning its various products — Microsoft Windows, Edge browser, Internet Explorer, ChakraCore, SQL Server, Exchange Server, Office, ASP.NET, OneDrive, Azure DevOps, Visual Studio, and Microsoft Dynamics — that received new patches, 23 are listed as critical, 105 are important, and one is moderate in severity. Unlike the past few months, none of the security vulnerabilities the tech giant patched in September are listed as being publicly known or under active attack at the time of release or at least not in knowledge of Microsoft. A memory corruption vulnerability ( CVE-2020-16875 ) in Microsoft Exchange software is worth highlighting all the critical flaws. The exploitation of this flaw could allow an attacker to run
Japan, France, New Zealand Warn of Sudden Uptick in Emotet Trojan Attacks

Japan, France, New Zealand Warn of Sudden Uptick in Emotet Trojan Attacks

September 08, 2020Ravie Lakshmanan
Cybersecurity agencies across Asia and Europe have issued multiple security alerts regarding the resurgence of email-based Emotet malware attacks targeting businesses in France, Japan, and New Zealand. "The emails contain malicious attachments or links that the receiver is encouraged to download," New Zealand's Computer Emergency Response Team (CERT) said. "These links and attachments may look like genuine invoices, financial documents, shipping information, resumes, scanned documents, or information on COVID-19, but they are fake." Echoing similar concerns, Japan's CERT (JPCERT/CC) cautioned it found a rapid increase in the number of domestic domain (.jp) email addresses that have been infected with the malware and can be misused to send spam emails in an attempt to spread the infection further. First identified in 2014 and distributed by a threat group tracked as TA542 (or Mummy Spider), Emotet has since evolved from its original roots as a s
New PIN Verification Bypass Flaw Affects Visa Contactless Payments

New PIN Verification Bypass Flaw Affects Visa Contactless Payments

September 07, 2020Ravie Lakshmanan
Even as Visa issued a warning about a new JavaScript web skimmer known as Baka , cybersecurity researchers have uncovered an authentication flaw in the company's EMV enabled payment cards that permits cybercriminals to obtain funds and defraud cardholders as well as merchants illicitly. The research , published by a group of academics from the ETH Zurich, is a PIN bypass attack that allows the adversaries to leverage a victim's stolen or lost credit card for making high-value purchases without knowledge of the card's PIN, and even trick a point of sale (PoS) terminal into accepting an unauthentic offline card transaction. All modern contactless cards that make use of the Visa protocol, including Visa Credit, Visa Debit, Visa Electron, and V Pay cards, are affected by the security flaw, but the researchers posited it could apply to EMV protocols implemented by Discover and UnionPay as well. The loophole, however, doesn't impact Mastercard, American Express, and JC
SMB Cybersecurity Catching Up to Enterprise… But the Human Element Still a Major Concern

SMB Cybersecurity Catching Up to Enterprise… But the Human Element Still a Major Concern

September 07, 2020The Hacker News
Cyberattacks on small to medium-sized businesses (SMBs) are continuing at a relentless pace, with the vast majority of data breaches coming from outside the organization . Some believe hackers are aggressively targeting these smaller firms because they believe SMBs lack adequate resources and enterprise-grade security tools, making them easier prey than larger businesses. A new report from Cisco, however, challenges this assumption. SMBs have made significant strides enhancing their security protocols and are closing the gap with their bigger counterparts. The report notes 87 percent of SMB business owners rank security a top priority, and more than 99 percent have a dedicated resource focusing on security. SMBs are also becoming more diligent about defining metrics to assess their security effectiveness and implementing security controls and tools at rates similar to large enterprises. No doubt, the emergence of security solutions developed specifically for SMBs is support
Evilnum hackers targeting financial firms with a new Python-based RAT

Evilnum hackers targeting financial firms with a new Python-based RAT

September 04, 2020Ravie Lakshmanan
An adversary known for targeting the fintech sector at least since 2018 has switched up its tactics to include a new Python-based remote access Trojan (RAT) that can steal passwords, documents, browser cookies, email credentials, and other sensitive information. In an analysis published by Cybereason researchers yesterday, the Evilnum group has not only tweaked its infection chain but has also deployed a Python RAT called "PyVil RAT," which possesses abilities to gather information, take screenshots, capture keystrokes data, open an SSH shell and deploy new tools. "Since the first reports in 2018 through today, the group's TTPs have evolved with different tools while the group has continued to focus on fintech targets," the cybersecurity firm said . "These variations include a change in the chain of infection and persistence, new infrastructure that is expanding over time, and the use of a new Python-scripted Remote Access Trojan (RAT)" to spy
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