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Cybersecurity firm CrowdStrike on Wednesday blamed an issue in its validation system for causing millions of Windows devices to crash as part of a widespread outage late last week. "On Friday, July 19, 2024 at 04:09 UTC, as part of regular operations, CrowdStrike released a content configuration update for the Windows sensor to gather telemetry on possible novel threat techniques," the company said in its Preliminary Post Incident Review (PIR). "These updates are a regular part of the dynamic protection mechanisms of the Falcon platform. The problematic Rapid Response Content configuration update resulted in a Windows system crash." The incident impacted Windows hosts running sensor version 7.11 and above that was online between July 19, 2024, 04:09 UTC and 05:27 UTC and received the update. Apple macOS and Linux systems were not affected. CrowdStrike said it delivers security content configuration updates in two ways, one via Sensor Content that's shippe...

Microsoft on Wednesday revealed that a China-based threat actor known as  Storm-0558  acquired the inactive consumer signing key to forge tokens and access Outlook by compromising an engineer's corporate account. This enabled the adversary to access a debugging environment that contained information pertaining to a crash of the consumer signing system and steal the key. The system crash took place in April 2021. "A consumer signing system crash in April of 2021 resulted in a snapshot of the crashed process ('crash dump')," the Microsoft Security Response Center (MSRC)  said  in a post-mortem report. "The crash dumps, which redact sensitive information, should not include the signing key. In this case, a race condition allowed the key to be present in the crash dump. The key material's presence in the crash dump was not detected by our systems." The Windows maker said the crash dump was moved to a debugging environment on the internet-connected corporate network...

Cybersecurity company CrowdStrike has published its root cause analysis detailing the Falcon Sensor software update crash that crippled millions of Windows devices globally. The "Channel File 291" incident, as originally highlighted in its Preliminary Post Incident Review (PIR), has been traced back to a content validation issue that arose after it introduced a new Template Type to enable visibility into and detection of novel attack techniques that abuse named pipes and other Windows interprocess communication (IPC) mechanisms. Specifically, it's related to a problematic content update deployed over the cloud, with the company describing it as a "confluence" of several shortcomings that led to a crash – the most prominent of them is a mismatch between the 21 inputs passed to the Content Validator via the IPC Template Type as opposed to the 20 supplied to the Content Interpreter. CrowdStrike said the parameter mismatch was not discovered during "multi...

A critical vulnerability has been discovered in Systemd , the popular init system and service manager for Linux operating systems, that could allow remote attackers to potentially trigger a buffer overflow to execute malicious code on the targeted machines via a DNS response. The vulnerability, designated as CVE-2017-9445 , actually resides in the ' dns_packet_new ' function of 'systemd-resolved,' a DNS response handler component that provides network name resolution to local applications. According to an advisory published Tuesday, a specially crafted malicious DNS response can crash 'systemd-resolved' program remotely when the system tries to lookup for a hostname on an attacker-controlled DNS service. Eventually, large DNS response overflows the buffer, allowing an attacker to overwrite the memory which leads to remote code execution. This means the attackers can remotely run any malware on the targeted system or server via their evil DNS service...

Businesses across the world have been hit by widespread disruptions to their Windows workstations stemming from a faulty update pushed out by cybersecurity company CrowdStrike. "CrowdStrike is actively working with customers impacted by a defect found in a single content update for Windows hosts," the company's CEO George Kurtz said in a statement . "Mac and Linux hosts are not impacted. This is not a security incident or cyber attack." The company, which acknowledged "reports of [ Blue Screens of Death ] on Windows hosts," further said it has identified the issue and a fix has been deployed for its Falcon Sensor product, urging customers to refer to the support portal for the latest updates. For systems that have been already impacted by the problem, the mitigation instructions are listed below - Boot Windows in Safe Mode or Windows Recovery Environment Navigate to the C:\Windows\System32\drivers\CrowdStrike directory Find the file named ...

In recent years, the number and sophistication of zero-day vulnerabilities have surged, posing a critical threat to organizations of all sizes. A zero-day vulnerability is a security flaw in software that is unknown to the vendor and remains unpatched at the time of discovery. Attackers exploit these flaws before any defensive measures can be implemented, making zero-days a potent weapon for cybercriminals. A recent example is, for instance, CVE-2024-0519 in Google Chrome: this high-severity vulnerability was actively exploited in the wild and involved an out-of-bounds memory access issue in the V8 JavaScript engine. It allowed remote attackers to access sensitive information or trigger a crash by exploiting heap corruption.  Also, the zero-day vulnerability at Rackspace caused massive trouble. This incident was a zero-day remote code execution vulnerability in ScienceLogic's monitoring application that led to the compromise of Rackspace's internal systems. The breach expose...

Multiple security vulnerabilities have been disclosed in softphone software from Linphone and MicroSIP that could be exploited by an unauthenticated remote adversary to crash the client and even extract sensitive information like password hashes by simply making a malicious call. The vulnerabilities, which were discovered by Moritz Abrell of German pen-testing firm SySS GmbH, have since been addressed by the respective manufacturers following responsible disclosure. Softphones are essentially software-based phones that mimic desk phones and allow for making telephone calls over the Internet without the need for using dedicated hardware. At the core of the issues are the SIP services offered by the clients to connect two peers to facilitate telephony services in IP-based mobile networks. SIP aka Session Initiation Protocol is a  signaling protocol  that's used to control interactive communication sessions, such as voice, video, chat and instant messaging, as well as games ...

A novel attack technique could be weaponized to rope thousands of public domain controllers (DCs) around the world to create a malicious botnet and use it to conduct powerful distributed denial-of-service (DDoS) attacks. The approach has been codenamed Win-DDoS by SafeBreach researchers Or Yair and Shahak Morag, who presented their findings at the DEF CON 33 security conference today. "As we explored the intricacies of the Windows LDAP client code, we discovered a significant flaw that allowed us to manipulate the URL referral process to point DCs at a victim server to overwhelm it," Yair and Morag said in a report shared with The Hacker News. "As a result, we were able to create Win-DDoS, a technique that would enable an attacker to harness the power of tens of thousands of public DCs around the world to create a malicious botnet with vast resources and upload rates. All without purchasing anything and without leaving a traceable footprint." In transforming...

What is Wireshark? Wireshark is the world's most popular network protocol analyzer. It is used for troubleshooting, analysis, development and education. What's New Bug Fixes The following vulnerabilities have been fixed. See the security advisory for details and a workaround. o Huzaifa Sidhpurwala of the Red Hat Security Response Team discovered that Wireshark could free an uninitialized pointer while reading a malformed pcap-ng file. (Bug 5652) Versions affected: 1.2.0 to 1.2.14 and 1.4.0 to 1.4.3. CVE-2011-0538 o Huzaifa Sidhpurwala of the Red Hat Security Response Team discovered that a large packet length in a pcap-ng file could crash Wireshark. (Bug 5661) Versions affected: 1.2.0 to 1.2.14 and 1.4.0 to 1.4.3. o Wireshark could overflow a buffer while reading a Nokia DCT3 trace file. (Bug 5661) Versions affected: 1.2.0 to 1.2.14 and 1.4.0 to 1.4.3. CVE-2011-07...

Microsoft kicked off 2025 with a new set of patches for a total of 161 security vulnerabilities across its software portfolio, including three zero-days that have been actively exploited in attacks. Of the 161 flaws, 11 are rated Critical and 149 are rated Important in severity. One other flaw, a non-Microsoft CVE related to a Windows Secure Boot bypass ( CVE-2024-7344 , CVSS score: 6.7), has not been assigned any severity. According to the Zero Day Initiative , the update marks the largest number of CVEs addressed in a single month since at least 2017. The fixes are in addition to seven vulnerabilities the Windows maker addressed in its Chromium-based Edge browser since the release of December 2024 Patch Tuesday updates. Prominent among the patches released by Microsoft is a trio of flaws in Windows Hyper-V NT Kernel Integration VSP ( CVE-2025-21333 , CVE-2025-21334 , and CVE-2025-21335 , CVSS scores: 7.8) that the company said has come under active exploitation in the wild. ...

A shortage of computer memory in the $2.4 billion Air Traffic Control System caused a Computer crash that resulted in the System collapse, according to an insider close to the incident. The problems began on 30 April, when a U-2 spy plane flew over southwestern US caused the air traffic control system that manages the airspace around Los Angeles' LAX airport, built by Lockheed Martin, to crash due to which hundreds of flight delayed or cancelled two weeks ago. " In theory, the same vulnerability could have been used by an attacker in a deliberate shut-down, " security experts told Reuters. Now that the " very basic limitation of the system " is known, experts showed concerns about the cyber-attacks . Sources claimed to Reuters that on April 30, 2014 the aircraft traffic failed to obtain the altitude information for a single U-2 spy plane which was flying over the area because a controller entered the altitude of the spook flight into the En Route Automation Moderni...

Emotet, a notorious email-based malware behind several botnet-driven spam campaigns and ransomware attacks, contained a flaw that allowed cybersecurity researchers to activate a kill-switch and prevent the malware from infecting systems for six months. "Most of the vulnerabilities and exploits that you read about are good news for attackers and bad news for the rest of us," Binary Defense's James Quinn said. "However, it's important to keep in mind that malware is software that can also have flaws. Just as attackers can exploit flaws in legitimate software to cause harm, defenders can also reverse-engineer malware to discover its vulnerabilities and then exploit those to defeat the malware." The kill-switch was alive between February 6, 2020, to August 6, 2020, for 182 days, before the malware authors patched their malware and closed the vulnerability. Since its first identification in 2014, Emotet has evolved from its initial roots as a banking ...