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Russian Hackers Had Covert Access to Ukraine's Telecom Giant for Months

Russian Hackers Had Covert Access to Ukraine's Telecom Giant for Months
Jan 05, 2024 Cyber Attack / Data Breach
Ukrainian cybersecurity authorities have disclosed that the Russian state-sponsored threat actor known as  Sandworm  was inside telecom operator Kyivstar's systems at least since May 2023. The development was  first reported  by Reuters. The  incident , described as a "powerful hacker attack," first came to light last month, knocking out access to mobile and internet services for millions of customers. Soon after the incident, a Russia-linked hacking group called Solntsepyok took responsibility for the breach. Solntsepyok has been assessed to be a Russian threat group with affiliations to the Main Directorate of the General Staff of the Armed Forces of the Russian Federation (GRU), which also operates Sandworm. The advanced persistent threat (APT) actor has a track record of orchestrating  disruptive cyber attacks , with Denmark  accusing  the hacking outfit of targeting 22 energy sector companies last year. Illia Vitiuk, head of the Security Service of Ukraine'

Discover How Gcore Thwarted Powerful 1.1Tbps and 1.6Tbps DDoS Attacks

Discover How Gcore Thwarted Powerful 1.1Tbps and 1.6Tbps DDoS Attacks
Dec 01, 2023 Network Security / Cyber Attack
The most recent  Gcore Radar report  and  its aftermath  have highlighted a dramatic increase in DDoS attacks across multiple industries. At the beginning of 2023, the average strength of attacks  reached 800 Gbps , but now, even a peak as high as 1.5+ Tbps is unsurprising. To try and break through Gcore's defenses, perpetrators made two attempts with two different strategies. Read on to discover what happened and learn how the security provider stopped the attackers in their tracks without affecting end users' experiences. A Powerful DDoS Attacks In November 2023, one of Gcore's customers from the gaming industry was targeted by two massive DDoS attacks, peaking at 1.1 and 1.6 Tbps respectively. The attackers deployed various techniques in an unsuccessful attempt to compromise Gcore's protective mechanisms. Attack #1: 1.1 Tbps UDP-based DDoS In the first cyber assault, the attackers sent a barrage of UDP traffic to a target server, peaking at 1.1 Tbps. Two methods were employed:
Webinar: Learn How to Stop Hackers from Exploiting Hidden Identity Weaknesses

Webinar: Learn How to Stop Hackers from Exploiting Hidden Identity Weaknesses

Apr 10, 2024Webinar / Identity Security
We all know passwords and firewalls are important, but what about the invisible threats lurking beneath the surface of your systems? Identity Threat Exposures (ITEs) are like secret tunnels for hackers – they make your security way more vulnerable than you think. Think of it like this: misconfigurations, forgotten accounts, and old settings are like cracks in your digital fortress walls. Hackers exploit these weaknesses to steal login information, gain sneaky access, and move around your systems unnoticed, whether they're in the cloud or on-site. This upcoming webinar,  " Today's Top 4 Identity Security Threat Exposures: Are You Vulnerable? "  isn't just for tech experts—it's about protecting your business.  We'll use real-world examples and insights from Silverfort's latest report to show you the hidden dangers of ITEs. You'll learn about: The Top 4 Identity Threats You Might Be Overlooking:  We'll name them and explain why they're

CISA Alerts: High-Severity SLP Vulnerability Now Under Active Exploitation

CISA Alerts: High-Severity SLP Vulnerability Now Under Active Exploitation
Nov 09, 2023 Cyber Attack / Vulnerability
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Wednesday  added  a high-severity flaw in the Service Location Protocol (SLP) to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation. Tracked as  CVE-2023-29552  (CVSS score: 7.5), the issue relates to a denial-of-service (DoS) vulnerability that could be weaponized to launch massive DoS amplification attacks. It was  disclosed  by Bitsight and Curesec earlier this April. "The Service Location Protocol (SLP) contains a denial-of-service (DoS) vulnerability that could allow an unauthenticated, remote attacker to register services and use spoofed UDP traffic to conduct a denial-of-service (DoS) attack with a significant amplification factor," CISA  said . SLP is a protocol that allows systems on a local area network (LAN) to discover each other and establish communications. The exact details surrounding the nature of exploitation of the flaw are currently unknown, bu

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Discover how you can overcome the SaaS security challenge by securing your entire SaaS stack with SSPM.

Rising Demand for DDoS Protection Software Market By 2020-2028

Rising Demand for DDoS Protection Software Market By 2020-2028
Mar 15, 2021
Distributed Denial of Service (DDoS) attack is a malicious form of attack that disrupts the regular network traffic by overwhelming the website with more traffic than the server can handle. The main aim of this kind of cyberattack is to render the website inoperable. Over recent years, these kinds of attacks are increasing, fueling the demand for the  best DDoS protection  software solutions. Many unplanned data center outages are owing to DDoS attacks. The threat of DDoS is due to access to easy-to-use tools and the profit potential through extortion.  The attacks target businesses directly, leading to substantial financial and personal losses, making it critical to have robust DDoS protection software solutions in place. According to the report of  Market Research Inc , the DDoS protection Software Market is predicted to reach +14% CAGR by 2020 – 2028.  Important Statistics to illustrate the growing demand for DDoS Software Solutions Demand for the DDoS software market is on th

New Cache Poisoning Attack Lets Attackers Target CDN Protected Sites

New Cache Poisoning Attack Lets Attackers Target CDN Protected Sites
Oct 23, 2019
A team of German cybersecurity researchers has discovered a new cache poisoning attack against web caching systems that could be used by an attacker to force a targeted website into delivering error pages to most of its visitors instead of legitimate content or resources. The issue could affect sites running behind reverse proxy cache systems like Varnish and some widely-used Content Distribution Networks (CDNs) services, including Amazon CloudFront, Cloudflare, Fastly, Akamai, and CDN77. In brief, a Content Distribution Network (CDN) is a geographically distributed group of servers that sit between the origin server of a website and its visitors to optimize the performance of the website. A CDN service simply stores/caches static files—including HTML pages, JavaScript files, stylesheets, images, and videos—from the origin server and delivers them to visitors more quickly without going back to the originating server again and again. Each of the geographically distributed CDN se

8 New HTTP/2 Implementation Flaws Expose Websites to DoS Attacks

8 New HTTP/2 Implementation Flaws Expose Websites to DoS Attacks
Aug 14, 2019
Various implementations of HTTP/2 , the latest version of the HTTP network protocol, have been found vulnerable to multiple security vulnerabilities affecting the most popular web server software, including Apache, Microsoft's IIS, and NGINX. Launched in May 2015, HTTP/2 has been designed for better security and improved online experience by speeding up page loads. Today, over hundreds of millions of websites, or some 40 percent of all the sites on the Internet, are running using HTTP/2 protocol. A total of eight high-severity HTTP/2 vulnerabilities , seven discovered by Jonathan Looney of Netflix and one by Piotr Sikora of Google, exist due to resource exhaustion when handling malicious input, allowing a client to overload server's queue management code. The vulnerabilities can be exploited to launch Denial of Service (DoS) attacks against millions of online services and websites that are running on a web server with the vulnerable implementation of HTTP/2 , knocking

Update Samba Servers Immediately to Patch Password Reset and DoS Vulnerabilities

Update Samba Servers Immediately to Patch Password Reset and DoS Vulnerabilities
Mar 13, 2018
Samba maintainers have just released new versions of their networking software to patch two critical vulnerabilities that could allow unprivileged remote attackers to launch DoS attacks against servers and change any other users' passwords, including admin's. Samba is open-source software (re-implementation of SMB networking protocol) that runs on the majority of operating systems available today, including Windows, Linux, UNIX, IBM System 390, and OpenVMS. Samba allows non-Windows operating systems, like GNU/Linux or Mac OS X, to share network shared folders, files, and printers with Windows operating system. The denial of service vulnerability, assigned CVE-2018-1050 , affects all versions of Samba from 4.0.0 onwards and could be exploited "when the RPC spoolss service is configured to be run as an external daemon." "Missing input sanitization checks on some of the input parameters to spoolss RPC calls could cause the print spooler service to crash.

5-Year-Old Linux Kernel Local Privilege Escalation Flaw Discovered

5-Year-Old Linux Kernel Local Privilege Escalation Flaw Discovered
Dec 07, 2016
A 5-year-old serious privilege-escalation vulnerability has been discovered in Linux kernel that affects almost every distro of the Linux operating system, including Redhat, and Ubuntu. Over a month back, a nine-year-old privilege-escalation vulnerability, dubbed " Dirty COW ," was discovered in the Linux kernel that affected every distro of the open-source operating system, including Red Hat, Debian, and Ubuntu. Now, another Linux kernel vulnerability ( CVE-2016-8655 ) that dates back to 2011 disclosed today could allow an unprivileged local user to gain root privileges by exploiting a race condition in the af_packet implementation in the Linux kernel. Philip Pettersson, the researcher who discovered the flaw, was able to create an exploit to gain a root shell on an Ubuntu 16.04 LTS system (Linux Kernel 4.4) and also defeated SMEP/SMAP (Supervisor Mode Execution Prevention/Supervisor Mode Access Prevention) protection to gain kernel code execution abilities. In

NTP DoS Exploit Released — Update Your Servers to Patch 10 Flaws

NTP DoS Exploit Released — Update Your Servers to Patch 10 Flaws
Nov 23, 2016
A proof-of-concept (PoC) exploit for a critical vulnerability in the Network Time Protocol daemon (ntpd) has been publically released that could allow anyone to crash a server with just a single maliciously crafted packet. The vulnerability has been patched by the Network Time Foundation with the release of NTP 4.2.8p9, which includes a total of 40 security patches, bug fixes, and improvements. The NTP daemon is used in almost every device that needs to synchronize time on computer clocks. NTP got the most attention in late 2014 and 2015 when hackers used it to launch highly amplified DDoS attacks against services. The flaw which affects NTP.org's nptd versions prior to 4.2.8p9, but not including ntp-4.3.94, has been discovered by security researcher Magnus Stubman, who privately disclosed it to the Network Time Foundation on June 24. A patch for the vulnerability was developed and sent to Stubman on 29th September and just two days later, the researcher acknowledged t

This Hack Gives Linux Root Shell Just By Pressing 'ENTER' for 70 Seconds

This Hack Gives Linux Root Shell Just By Pressing 'ENTER' for 70 Seconds
Nov 16, 2016
A hacker with little more than a minute can bypass the authentication procedures on some Linux systems just by holding down the Enter key for around 70 seconds. The result? The act grants the hacker a shell with root privileges, which allows them to gain complete remote control over encrypted Linux machine. The security issue relies due to a vulnerability ( CVE-2016-4484 ) in the implementation of the Cryptsetup utility used for encrypting hard drives via Linux Unified Key Setup (LUKS), which is the standard implementation of disk encryption on a Linux-based operating system. The flaw actually is in the way the Cryptsetup utility handles password failures for the decryption process when a system boots up, which lets a user retry the password multiple times. What's even worse? Even if the user has tried up all 93 password attempts, the user is dropped to a shell (Busybox in Ubuntu) that has root privileges. In other words, if you enter a blank password 93 times – or s

Microsoft Releases 12 Security Updates (5 Critical and 7 Important Patches)

Microsoft Releases 12 Security Updates (5 Critical and 7 Important Patches)
Sep 09, 2015
With the release of 12 Security Bulletins , Microsoft addresses a total of 56 vulnerabilities in its different products. The bulletins include five critical updates, out of which two address vulnerabilities in all versions of Windows. The September Patch Tuesday update (released on second Tuesday of each month) makes a total of 105 Security Bulletins being released this year; which is more than the previous year with still three months remaining for the current year to end. The reason for the increase in the total number of security bulletins within such less time might be because of Windows 10 release and its installation reaching to a score of 100 million. Starting from MS15-094 to   MS15-105 ( 12 security bulletins ) Microsoft rates the severity of the vulnerabilities and their impact on the affected software. Bulletins MS15-094 and MS15-095 are the cumulative updates, meaning these are product-specific fixes for security related vulnerabilities that are rated

Android Wi-Fi Direct Vulnerability Lets Hackers to Kick your Devices OFF

Android Wi-Fi Direct Vulnerability Lets Hackers to Kick your Devices OFF
Jan 27, 2015
Security researchers from Core Security has reportedly found a Denial of Service ( DoS ) attack vulnerability in Android WiFi-Direct. Android's WiFi-Direct is a wireless technology that allows two devices to establish a direct, peer-to-peer Wi-Fi connection without requiring a wireless router. Smartphones have been able to support Wi-Fi Direct for a while now. According to the advisory , the remotely exploitable denial-of-service vulnerability is affecting a wide number of Android mobile devices when it scans for WiFi Direct devices. If exploited, the vulnerability would let an attacker force a reboot of a device. " An attacker could send a specially crafted 802.11 Probe Response frame causing the Dalvik subsystem to reboot because of an Unhandle Exception on WiFiMonitor class ," advisory states. The Android WiFi-Direct vulnerability (CVE-2014-0997) affects: Nexus 5 - Android 4.4.4 Nexus 4 - Android 4.4.4 LG D806 - Android 4.2.2 Samsung SM-T310 - Android

Millions of WordPress and Drupal Websites Vulnerable to DoS Attack

Millions of WordPress and Drupal Websites Vulnerable to DoS Attack
Aug 07, 2014
Users running the website on a self-hosted WordPress or on Drupal are strongly recommended to update their websites to the latest version immediately. A moderately critical vulnerability was discovered in the way Drupal and WordPress implement XMLRPC, which can lead an attacker to disable your website via a method known as Denial of Service (DoS) . VULNERABILITY RESULTS IN DoS ATTACK The latest update of WordPress 3.9.2 mainly addresses an issue in the PHP's XML processor that could be exploited to trigger a DoS (denial of service) attack . The vulnerability affects all previous versions of WordPress. The XML vulnerability was first reported by Nir Goldshlager , a security researcher from Salesforce.com's product security team, that impacts both the popular website platforms. The issue was later fixed by Michael Adams and Andrew Nacin of the WordPress security team and David Rothstein of the Drupal security team. ATTACK MAKES YOUR WEBSITE COMPLETELY INACCES

This July Microsoft Plans to Patch Windows and Internet Explorer Vulnerabilities

This July Microsoft Plans to Patch Windows and Internet Explorer Vulnerabilities
Jul 04, 2014
Beginning of the new month, Get Ready for Microsoft Patch Tuesday! Microsoft has released its Advance Notification for the month of July 2014 Patch Tuesday releasing six security Bulletins, which will address a total of six vulnerabilities in its products, out of which two are marked critical, one is rated moderate and rest are important in severity. All six vulnerabilities are important for you to patch, as the flaws are affecting various Microsoft software, including Microsoft Windows, Microsoft Server Software and Internet Explorer, with the critical ones targeting Internet Explorer and Windows. Microsoft is also providing an update for the " Microsoft Service Bus for Windows Server " which is rated moderate for a Denial of Service (DoS) flaw. " At first glance it looks like Microsoft may be taking it easy on us this month, which would be nice since we will be coming off a long holiday weekend here in the U.S."  Chris Goettl from IT Security firm

Google Nexus phone vulnerable to SMS-based DOS attack

Google Nexus phone vulnerable to SMS-based DOS attack
Nov 30, 2013
Google's Nexus Smartphones are vulnerable to SMS-based DOS attack , where an attacker can force it to restart, freeze, or lose network connection by sending a large number of special SMS messages to them. The vulnerability, discovered by Bogdan Alecu , a system administrator at Dutch IT services company Levi9, and affects all Android 4.x firmware versions on Google Galaxy Nexus, Nexus 4 and Nexus 5. The problem is with how the phones handle a special type of text message, known as a flash SMS. By sending around 30 Flash SMS ( Flash SMS is a type of message that normally is not stored by the system and does not trigger any audio alerts ) messages to Nexus phone an attacker can cause the phone to malfunction. He presented the vulnerability on Friday at the DefCamp security conference in Bucharest, Romania. In an email exchange with me, he said ' I was testing different message types and for the class 0 messages I noticed that the popup being displayed also adds an extra layer wh

World's 3rd Largest Chinese Bitcoin exchange hit by 100Gbps DDoS attack

World's 3rd Largest Chinese Bitcoin exchange hit by 100Gbps DDoS attack
Oct 17, 2013
In March of this year, we saw the first ever 300 Gigabit DDoS attack , which was possible due to a DNS Reflection Amplification attack against Spamhaus . On 24 September World's 3rd Largest Bitcoin exchange BTC China , a platform where both Bitcoin and Chinese yuan are traded faced massive DDoS attack for continued nine hours, where no amplification techniques were used. Incapsula , Cloud-based security service provider helped the Chinese Bitcoin trader to protect them from such massive denial-of-service attack and successfully mitigated the threats. Incapsula tweeted  a graph of DDoS attack last month as shown, " Yesterday we prevented a ~100Gbps DDoS. The attack's load was distributed across our 350Gbps network. " Specialist at Incapsula shared the details of the attack with TheRegister , explained " The attack against BTC China took the form of a SYN flood rather than the DNS amplification-style attack ", " The attacker balanced the assault betwee

Microsoft Patch Tuesday to Fix Three Critical Remote Code Execution vulnerabilities

Microsoft Patch Tuesday to Fix Three Critical Remote Code Execution vulnerabilities
Aug 13, 2013
Yeah, it's Patch Tuesday once again. Almost 10 years ago in October, 2003 - Microsoft  invented the process of regularly scheduled security updates on every second Tuesday of the Month, as  Patch Tuesday. Today, the Microsoft Security team will i ssue eight security updates in total, out of that -- three of which are designated as " critical ," and rest five as " Important " updates, that patches vulnerabilities in Microsoft Windows, Microsoft Server Software, and Internet Explorer. The eight bulletins that Microsoft is releasing fixes a total of 23 different vulnerabilities in Microsoft products. Microsoft will be rolling out a total of three Critical patches dealing with Remote Code Execution. Windows 8 is expected to get four of the updates, one of them is critical and dealing with Remote Code Execution with Internet Explorer 10, while the other three updates are Important and deal with Elevation of Privilege and Denial of Service . Windows RT i
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