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The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday added three security flaws to its Known Exploited Vulnerabilities ( KEV ) catalog based on evidence of active exploitation in the wild. The  vulnerabilities  are as follows - CVE-2023-36584  (CVSS score: 5.4) - Microsoft Windows Mark-of-the-Web (MotW) Security Feature Bypass Vulnerability CVE-2023-1671  (CVSS score: 9.8) - Sophos Web Appliance Command Injection Vulnerability CVE-2020-2551  (CVSS score: 9.8) - Oracle Fusion Middleware Unspecified Vulnerability CVE-2023-1671 relates to a critical  pre-auth command injection vulnerability  that allows for the execution of arbitrary code. CVE-2020-2551 is a  flaw  in the WLS Core Components that allows an unauthenticated attacker with network access to compromise the WebLogic Server. There are currently no public reports documenting in-the-wild attacks leveraging CVE-2023-1671, but Cybernews disclosed in July ...

A zero-day flaw in the Zimbra Collaboration email software was exploited by four different groups in real-world attacks to pilfer email data, user credentials, and authentication tokens. "Most of this activity occurred after the initial fix became public on GitHub," Google Threat Analysis Group (TAG)  said  in a report shared with The Hacker News. The flaw, tracked as  CVE-2023-37580  (CVSS score: 6.1), is a  reflected cross-site scripting  (XSS) vulnerability impacting versions before 8.8.15 Patch 41. It was  addressed  by Zimbra as part of patches released on July 25, 2023. Successful exploitation of the shortcoming could allow execution of malicious scripts on the victims' web browser simply by tricking them into clicking on a specially crafted URL, effectively initiating the XSS request to Zimbra and reflecting the attack back to the user. Google TAG, whose researcher Clément Lecigne was credited with discovering and reporting the bug, s...

A hacking group that leveraged a recently disclosed security flaw in the WinRAR software as a zero-day has now been categorized as an entirely new advanced persistent threat (APT). Cybersecurity company NSFOCUS has described  DarkCasino  as an "economically motivated" actor that first came to light in 2021. "DarkCasino is an APT threat actor with strong technical and learning ability, who is good at integrating various popular APT attack technologies into its attack process," the company  said  in an analysis. "Attacks launched by the APT group DarkCasino are very frequent, demonstrating a strong desire to steal online property." DarkCasino was most recently linked to the zero-day exploitation of  CVE-2023-38831  (CVSS score: 7.8), a security flaw that can be weaponized to launch malicious payloads. In August 2023, Group-IB disclosed real-world attacks weaponizing the vulnerability and aimed at online trading forums at least since April 2023 to deli...

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The threat actors behind the  Rhysida ransomware  engage in opportunistic attacks targeting organizations spanning various industry sectors. The advisory comes courtesy of the U.S. Cybersecurity and Infrastructure Security Agency (CISA), the Federal Bureau of Investigation (FBI), and the Multi-State Information Sharing and Analysis Center (MS-ISAC). "Observed as a ransomware-as-a-service (RaaS) model, Rhysida actors have compromised organizations in education, manufacturing, information technology, and government sectors and any ransom paid is split between the group and affiliates," the agencies  said . " Rhysida actors leverage external-facing remote services, such as virtual private networks (VPNs), Zerologon vulnerability (CVE-2020-1472), and phishing campaigns to gain initial access and persistence within a network." First detected in May 2023,  Rhysida  makes use of the time-tested tactic of double extortion, demanding a ransom payment to decrypt vic...

A set of novel attack methods has been demonstrated against Google Workspace and the Google Cloud Platform that could be potentially leveraged by threat actors to conduct ransomware, data exfiltration, and password recovery attacks. "Starting from a single compromised machine, threat actors could progress in several ways: they could move to other cloned machines with  GCPW  installed, gain access to the cloud platform with custom permissions, or decrypt locally stored passwords to continue their attack beyond the Google ecosystem," Martin Zugec, technical solutions director at Bitdefender,  said  in a new report. A prerequisite for these attacks is that the bad actor has already gained access to a local machine through other means, prompting Google to mark the bug as  not eligible for fixing  "since it's outside of our threat model and the behavior is in line with Chrome's practices of storing local data." However, the Romanian cybersecurity firm has w...

Russian threat actors have been possibly linked to what's been described as the "largest cyber attack against Danish critical infrastructure," in which 22 companies associated with the operation of the country's energy sector were targeted in May 2023.  "22 simultaneous, successful cyberattacks against Danish critical infrastructure are not commonplace," Denmark's SektorCERT  said  [PDF]. "The attackers knew in advance who they were going to target and got it right every time. Not once did a shot miss the target." The agency said it found evidence connecting one or more attacks to Russia's GRU military intelligence agency, which is also tracked under the name  Sandworm  and has a track record of orchestrating disruptive cyber assaults on industrial control systems. This assessment is based on artifacts communicating with IP addresses that have been traced to the hacking crew. The unprecedented and coordinated cyber attacks took place on...

The U.S. government on Tuesday announced the takedown of the IPStorm botnet proxy network and its infrastructure, as the Russian and Moldovan national behind the operation pleaded guilty. "The botnet infrastructure had infected Windows systems then further expanded to infect Linux, Mac, and Android devices, victimizing computers and other electronic devices around the world, including in Asia, Europe, North America and South America," the Department of Justice (DoJ)  said  in a press statement. Sergei Makinin, who developed and deployed the malicious software to infiltrate thousands of internet-connected devices from June 2019 through December 2022, faces a maximum of 30 years in prison. The Golang-based botnet malware, prior to its dismantling,  turned the infected devices into proxies  as part of a for-profit scheme, which was then offered to other customers via proxx[.]io and proxx[.]net. "IPStorm is a botnet that abuses a legitimate peer-to-peer (p2p) netwo...

Cybersecurity researchers have demonstrated a new technique that exploits a critical security flaw in Apache ActiveMQ to achieve arbitrary code execution in memory. Tracked as  CVE-2023-46604  (CVSS score: 10.0), the vulnerability is a remote code execution bug that could permit a threat actor to run arbitrary shell commands. It was patched by Apache in ActiveMQ versions 5.15.16, 5.16.7, 5.17.6, or 5.18.3 released late last month. The vulnerability has since  come under   active exploitation  by ransomware outfits to deploy ransomware such as HelloKitty and a strain that shares similarities with TellYouThePass as well as a remote access trojan called SparkRAT. According to  new findings  from VulnCheck, threat actors weaponizing the flaw are  relying  on a public proof-of-concept ( PoC ) exploit originally disclosed on October 25, 2023. The attacks have been found to use  ClassPathXmlApplicationContext , a class that's part of the...

What do basketball teams, government agencies, and car manufacturers have in common? Each one has been breached, having confidential, proprietary, or private information stolen and exposed by insiders. In each case, the motivations and methods varied, but the risk remained the same: insiders have access to too much data with too few controls. Insider threats  continue to prove difficult for organizations to combat because — unlike an outsider — insiders can navigate sensitive data undetected and typically without suspicion. Cybersecurity is not the first industry to tackle insider threats, however. Espionage has a long history of facing and defending against insiders by using the "CIA Triad" principles of confidentiality, integrity, and availability. Varonis' modern cybersecurity answer to insider risk is the data security triad of "sensitivity, access, and activity." Using these three dimensions of data security, you can help reduce the risk and impact of an insider attack. ...

Intel has released fixes to close out a high-severity flaw codenamed  Reptar  that impacts its desktop, mobile, and server CPUs. Tracked as  CVE-2023-23583  (CVSS score: 8.8), the  issue  has the potential to "allow escalation of privilege and/or information disclosure and/or denial of service via local access." Successful exploitation of the vulnerability could also permit a bypass of the CPU's security boundaries, according to Google Cloud, which described it as an issue stemming from how redundant prefixes are interpreted by the processor. "The impact of this vulnerability is demonstrated when exploited by an attacker in a multi-tenant virtualized environment, as the exploit on a guest machine causes the host machine to crash resulting in a Denial of Service to other guest machines running on the same host," Google Cloud's Phil Venables  said . "Additionally, the vulnerability could potentially lead to information disclosure or privilege escal...

Microsoft has released fixes to address  63 security bugs  in its software for the month of November 2023, including three vulnerabilities that have come under active exploitation in the wild. Of the 63 flaws, three are rated Critical, 56 are rated Important, and four are rated Moderate in severity. Two of them have been listed as publicly known at the time of the release. The updates are in addition to  more than 35 security shortcomings  addressed in its Chromium-based Edge browser since the release of Patch Tuesday updates for October 2023. The five zero-days that are of note are as follows - CVE-2023-36025  (CVSS score: 8.8) - Windows SmartScreen Security Feature Bypass Vulnerability CVE-2023-36033  (CVSS score: 7.8) - Windows DWM Core Library Elevation of Privilege Vulnerability CVE-2023-36036  (CVSS score: 7.8) - Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability CVE-2023-36038  (CVSS score: 8.2) - ASP.NET C...