network hacking | Breaking Cybersecurity News | The Hacker News

As 5G networks are being gradually rolled out in major cities across the world, an analysis of its network architecture has revealed a number of potential weaknesses that could be exploited to carry out a slew of cyber assaults, including denial-of-service (DoS) attacks to deprive subscribers of Internet access and intercept data traffic. The findings form the basis of a new " 5G Standalone core security research " published by London-based cybersecurity firm Positive Technologies today, exactly six months after the company released its " Vulnerabilities in LTE and 5G Networks 2020 " report in June detailing high impact flaws in LTE and 5G protocols. "Key elements of network security include proper configuration of equipment, as well as authentication and authorization of network elements," Positive Technologies said. "In the absence of these elements, the network becomes vulnerable [to] subscriber denial of service due to exploitation of vulnera...

A group of academics from the University of California and Tsinghua University has uncovered a series of critical security flaws that could lead to a revival of DNS cache poisoning attacks. Dubbed " SAD DNS attack " (short for Side-channel AttackeD DNS), the technique makes it possible for a malicious actor to carry out an off-path attack, rerouting any traffic originally destined to a specific domain to a server under their control, thereby allowing them to eavesdrop and tamper with the communications. "This represents an important milestone — the first weaponizable network side channel attack that has serious security impacts," the researchers said. "The attack allows an off-path attacker to inject a malicious DNS record into a DNS cache." Tracked as CVE-2020-25705, the findings were presented at the ACM Conference on Computer, and Communications Security (CCS '20) held this week. The flaw affects operating systems Linux 3.18-5.10, Windows Serv...

Are you using the cloud or thinking about transitioning? Undoubtedly, multi-cloud and hybrid environments offer numerous benefits for organizations. However, the cloud's flexibility, scalability, and efficiency come with significant risk — an expanded attack surface. The decentralization that comes with utilizing multi-cloud environments can also lead to limited visibility into user activity and poor access management.  Privileged accounts with access to your critical systems and sensitive data are among the most vulnerable elements in cloud setups. When mismanaged, these accounts open the doors to unauthorized access, potential malicious activity, and data breaches. That's why strong privileged access management (PAM) is indispensable. PAM plays an essential role in addressing the security challenges of complex infrastructures by enforcing strict access controls and managing the life cycle of privileged accounts. By employing PAM in hybrid and cloud environments, you're not...

Security researchers have outlined a new technique that renders a remote timing-based side-channel attack more effective regardless of the network congestion between the adversary and the target server. Remote timing attacks that work over a network connection are predominantly affected by variations in network transmission time (or jitter), which, in turn, depends on the load of the network connection at any given point in time. But since measuring the time taken to execute cryptographic algorithms is crucial to carrying out a timing attack and consequently leak information, the jitter on the network path from the attacker to the server can make it impractical to successfully exploit timing side-channels that rely on a small difference in execution time. The new method, called Timeless Timing Attacks (TTAs) by researchers from DistriNet Research Group and New York University Abu Dhabi, instead leverages multiplexing of network protocols and concurrent execution by applicati...

Cybersecurity researchers today uncovered a new high-severity hardware vulnerability residing in the widely-used Wi-Fi chips manufactured by Broadcom and Cypress—apparently powering over a billion devices, including smartphones, tablets, laptops, routers, and IoT gadgets. Dubbed ' Kr00k ' and tracked as CVE-2019-15126 , the flaw could let nearby remote attackers intercept and decrypt some wireless network packets transmitted over-the-air by a vulnerable device. The attacker does not need to be connected to the victim's wireless network and the flaw works against vulnerable devices using WPA2-Personal or WPA2-Enterprise protocols, with AES-CCMP encryption, to protect their network traffic. "Our tests confirmed some client devices by Amazon (Echo, Kindle), Apple (iPhone, iPad, MacBook), Google (Nexus), Samsung (Galaxy), Raspberry (Pi 3), Xiaomi (RedMi), as well as some access points by Asus and Huawei, were vulnerable to Kr00k," ESET researchers said. Acc...

Several Cisco-manufactured network equipments have been found vulnerable to five new security vulnerabilities that could allow hackers to take complete control over them, and subsequently, over the enterprise networks they power. Four of the five high-severity bugs are remote code execution issues affecting Cisco routers, switches, and IP cameras, whereas the fifth vulnerability is a denial-of-service issue affecting Cisco IP phones. Collectively dubbed ' CDPwn ,' the reported vulnerabilities reside in the various implementations of the Cisco Discovery Protocol (CDP) that comes enabled by default on virtually all Cisco devices and can not be turned OFF. Cisco Discovery Protocol (CDP) is an administrative protocol that works at Layer 2 of the Internet Protocol (IP) stack. The protocol has been designed to let devices discover information about other locally attached Cisco equipment in the same network. According to a report Armis research team shared with The Hacker N...

Popular enterprise software company Citrix that provides services to the U.S. military, the FBI, many U.S. corporations, and various U.S. government agencies disclosed last weekend a massive data breach of its internal network by "international cyber criminals." Citrix said it was warned by the FBI on Wednesday of foreign hackers compromising its IT systems and stealing "business documents," adding that the company does not know precisely which documents the hackers obtained nor how they got in. However, the FBI believes that the miscreants likely used a "password spraying" attack where the attackers guessed weak passwords to gain an early foothold in the company's network in order to launch more extensive attacks. "While not confirmed, the FBI has advised that the hackers likely used a tactic known as password spraying, a technique that exploits weak passwords. Once they gained a foothold with limited access, they worked to circumvent...

This may sound crazy, but it's true! The war for "most-subscribed Youtube channel" crown between T-Series and PewDiePie just took an interesting turn after a hacker yesterday hijacked more than 50,000 internet-connected printers worldwide to print out flyers asking everyone to subscribe to PewDiePie YouTube channel. PewDiePie, whose real name is Felix Kjellberg, is a famous YouTuber from Sweden known for his game commentary and pranks and has had the most subscribers on YouTube since 2013. However, the channel owned by Bollywood record label T-Series has been catching up in recent months, and now both are hovering around 72.5 million YouTube subscribers. From this fear that PewDiePie won't remain the number one most-subscribed YouTuber in the world, an anonymous hacker (probably his die-hard fan) with the Twitter username " TheHackerGiraffe " came up with a hackish idea. TheHackerGiraffe scanned the Internet to find the list of vulnerable printers...

Multinational computer technology company Dell disclosed Wednesday that its online electronics marketplace experienced a "cybersecurity incident" earlier this month when an unknown group of hackers infiltrated its internal network. On November 9, Dell detected and disrupted unauthorized activity on its network attempting to steal customer information, including their names, email addresses and hashed passwords. According to the company, the initial investigation found no conclusive evidence that the hackers succeeded to extract any information, but as a countermeasure Dell has reset passwords for all accounts on Dell.com website whether the data had been stolen or not. Dell did not share any information on how hackers managed to infiltrate its network at the first place or how many user accounts were affected, but the company did confirm that payment information and Social Security numbers were not targeted. "Credit card and other sensitive customer information...

Security researchers have discovered even more dangerous capabilities in VPNFilter —the highly sophisticated multi-stage malware that infected 500,000 routers worldwide in May this year, making it much more widespread and sophisticated than earlier. Attributed to Russia's APT 28, also known as 'Fancy Bear,' VPNFilter is a malware platform designed to infect routers and network-attached storage devices from 75 brands including Linksys, MikroTik, Netgear, TP-Link, QNAP, ASUS, D-Link, Huawei, ZTE, Ubiquiti, and UPVEL. In May, when VPNFilter infected half a million routers and NAS devices in 54 countries, the FBI seized a key command-and-control domain used by the malware and asked people to reboot their routers. Initially, it was found that VPNFilter had been built with multiple attack modules that could be deployed to the infected routers to steal website credentials and monitor industrial controls or SCADA systems, such as those used in electric grids, other infr...

What maximum a remote attacker can do just by having your Fax machine number? Believe it or not, but your fax number is literally enough for a hacker to gain complete control over the printer and possibly infiltrate the rest of the network connected to it. Check Point researchers have revealed details of two critical remote code execution (RCE) vulnerabilities they discovered in the communication protocols used in tens of millions of fax machines globally. You might be thinking who uses Fax these days! Well, Fax is not a thing of the past. With more than 300 million fax numbers and 45 million fax machines in use globally, Fax is still popular among several business organizations, regulators, lawyers, bankers, and real estate firms. Since most fax machines are today integrated into all-in-one printers, connected to a WiFi network and PSTN phone line, a remote attacker can simply send a specially-crafted image file via fax to exploit the reported vulnerabilities and seize co...

If your mobile carrier offers LTE, also known as the 4G network, you need to beware as your network communication can be hijacked remotely. A team of researchers has discovered some critical weaknesses in the ubiquitous LTE mobile device standard that could allow sophisticated hackers to spy on users' cellular networks, modify the contents of their communications, and even can re-route them to malicious or phishing websites. LTE, or Long Term Evolution, is the latest mobile telephony standard used by billions of people designed to bring many security improvements over the predecessor standard known as Global System for Mobile (GSM) communications. However, multiple security flaws have been discovered over the past few years, allowing attackers to intercept user's communications, spy on user phone calls and text messages, send fake emergency alerts, spoof location of the device and knock devices entirely offline. 4G LTE Network Vulnerabilities Now, security researchers...

Last week, we reported about the first network-based remote Rowhammer attack, dubbed Throwhammer , which involves the exploitation a known vulnerability in DRAM through network cards using remote direct memory access (RDMA) channels. However, a separate team of security researchers has now demonstrated a second network-based remote Rowhammer technique that can be used to attack systems using uncached memory or flush instruction while processing the network requests. The research was carried out by researchers who discovered Meltdown and Spectre CPU vulnerabilities, which is independent of the Amsterdam researchers who presented a series of Rowhammer attacks, including Throwhammer published last week. If you are unaware, Rowhammer is a critical issue with recent generation dynamic random access memory (DRAM) chips in which repeatedly accessing a row of memory can cause "bit flipping" in an adjacent row, allowing attackers to change the contents of the memory. The...

Exploitation of Rowhammer attack just got easier. Dubbed ' Throwhammer ,' the newly discovered technique could allow attackers to launch Rowhammer attack on the targeted systems just by sending specially crafted packets to the vulnerable network cards over the local area network. Known since 2012, Rowhammer is a severe issue with recent generation dynamic random access memory (DRAM) chips in which repeatedly accessing a row of memory can cause "bit flipping" in an adjacent row, allowing anyone to change the contents of computer memory. The issue has since been exploited in a number of ways to achieve remote code execution on the vulnerable computers and servers. Just last week, security researchers detailed a proof-of-concept Rowhammer attack technique, dubbed GLitch , that leverages embedded graphics processing units (GPUs) to carry out Rowhammer attacks against Android devices. However, all previously known Rowhammer attack techniques required privilege escal...

Remember a young hacker who hacked jail systems in an attempt to release his prison inmate early? Well, that hacker will now be joining his inmate behind bars. Konrads Voits of Ypsilanti, Michigan, has been sentenced to seven years and three months in prison for attempting to hack the Washtenaw County Jail computer system and modifying prison records to get his friend released early. Besides spending 87 months in prison, Voits has also been ordered to pay $235,488 in fine to Washtenaw County for the cost accrued in investigating and cleaning up the infiltration that resulted in the compromise of personal information of around 1,600 employees, the US Justice Department announced last week. Between January 24th, 2017 and March 10th, 2017, Voits successfully tricked IT staff at Washtenaw County Jail into visiting a phony website at "ewashtenavv.org," which mimics the official URL, "ewashtenaw.org." The malicious website then installed malware on the IT ...

Internet-connected technology, also known as the Internet of Things (IoT), is now part of daily life, with smart assistants like Siri and Alexa to cars, watches, toasters, fridges, thermostats, lights, and the list goes on and on. But of much greater concern, enterprises are unable to secure each and every device on their network, giving cybercriminals hold on their network hostage with just one insecure device. Since IoT is a double-edged sword, it not only poses huge risks to enterprises worldwide but also has the potential to severely disrupt other organisations, or the Internet itself . There's no better example than Mirai , the botnet malware that knocked the world's biggest and most popular websites offline for few hours over a year ago. We have another great example that showcases how one innocent looking insecure IoT device connected to your network can cause security nightmares. Nicole Eagan, the CEO of cybersecurity company Darktrace, told attendees at...

A critical vulnerability has been discovered in Credential Security Support Provider protocol (CredSSP) that affects all versions of Windows to date and could allow remote attackers to exploit RDP and WinRM to steal data and run malicious code. CredSSP protocol has been designed to be used by RDP (Remote Desktop Protocol) and Windows Remote Management (WinRM) that takes care of securely forwarding credentials encrypted from the Windows client to the target servers for remote authentication. Discovered by researchers at Cybersecurity firm Preempt Security, the issue (CVE-2018-0886) is a logical cryptographic flaw in CredSSP that can be exploited by a man-in-the-middle attacker with Wi-Fi or physical access to the network to steal session authentication data and perform a Remote Procedure Call attack. When a client and server authenticate over RDP and WinRM connection protocols, a man-in-the-middle attacker can execute remote commands to compromise enterprise networks. "A...

Security researchers have discovered a set of severe vulnerabilities in 4G LTE protocol that could be exploited to spy on user phone calls and text messages, send fake emergency alerts, spoof location of the device and even knock devices entirely offline. A new research paper [ PDF ] recently published by researchers at Purdue University and the University of Iowa details 10 new cyber attacks against the 4G LTE wireless data communications technology for mobile devices and data terminals. The attacks exploit design weaknesses in three key protocol procedures of the 4G LTE network known as attach, detach, and paging. Unlike many previous research, these aren't just theoretical attacks. The researchers employed a systematic model-based adversarial testing approach, which they called LTEInspector , and were able to test 8 of the 10 attacks in a real testbed using SIM cards from four large US carriers. Authentication Synchronization Failure Attack Traceability Attack Nu...