Tag Archive for: actively

Update Chrome Now to Fix New Actively Exploited Vulnerability

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Jan 17, 2024NewsroomBrowser Security / Vulnerability

Chrome Zero Day Vulnerability

Google on Tuesday released updates to fix four security issues in its Chrome browser, including an actively exploited zero-day flaw.

The issue, tracked as CVE-2024-0519, concerns an out-of-bounds memory access in the V8 JavaScript and WebAssembly engine, which can be weaponized by threat actors to trigger a crash.

Cybersecurity

“By reading out-of-bounds memory, an attacker might be able to get secret values, such as memory addresses, which can be bypass protection mechanisms such as ASLR in order to improve the reliability and likelihood of exploiting a separate weakness to achieve code execution instead of just denial of service,” according to MITRE’s Common Weakness Enumeration (CWE).

Additional details about the nature of the attacks and the threat actors that may be exploiting it have been withheld in an attempt to prevent further exploitation. The issue was reported anonymously on January 11, 2024.

“Out-of-bounds memory access in V8 in Google Chrome prior to 120.0.6099.224 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page,” reads a description of the flaw on the NIST’s National Vulnerability Database (NVD).

Cybersecurity

The development marks the first actively exploited zero-day to be patched by Google in Chrome in 2024. Last year, the tech giant resolved a total of 8 such actively exploited zero-days in the browser.

Users are recommended to upgrade to Chrome version 120.0.6099.224/225 for Windows, 120.0.6099.234 for macOS, and 120.0.6099.224 for Linux to mitigate potential threats.

Users of Chromium-based browsers such as Microsoft Edge, Brave, Opera, and Vivaldi are also advised to apply the fixes as and when they become available.

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Two zero-days in Ivanti products actively exploited by threat actor

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Researchers suspect an espionage-focused threat group linked to China is behind the exploitation of a pair of newly discovered zero-day bugs in Ivanti VPN appliances.

Meanwhile, Volexity disclosed in a Dec. 10 blog its researchers uncovered an exploit chain the threat actor used after detecting suspicious lateral movement on the network of one of its customers. Ivanti confirmed the authentication bypass and command injection vulnerabilities on its website.

The vulnerabilities are an authentication bypass (CVE-2023-46805) and a command injection (CVE-2024-21887) bug affecting fully-patched Ivanti Connect Secure (formerly known as Pulse Connect Secure) and Policy Secure appliances.

“If CVE-2024-21887 is used in conjunction with CVE-2023-46805, exploitation does not require authentication and enables a threat actor to craft malicious requests and execute arbitrary commands on the system, Ivanti said in a Jan. 10 advisory.

CVE-2023-46805 has an 8.2 CVSS rating and is described as an authentication bypass vulnerability in the web component of Ivanti ICS 9.x, 22.x and Ivanti Policy Secure that “allows a remote attacker to access restricted resources by bypassing control check.”

The second bug, CVE-2024-21887, has a 9.1 CVSS rating and is a command injection vulnerability in web components of Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure that “allows an authenticated administrator to send specially crafted requests and execute arbitrary commands on the appliance. 

In the wild exploitation

In-the-wild exploitation of the bugs was observed by researchers at Volexity who said in a post that while they could not identify the group responsible, they believed it was a Chinese nation-state-level threat actor.

Ivanti said it had created a mitigation to be applied to the gateways as an initial response while patches for the bug were developed. Patches would be released in a staggered schedule beginning the week of January 22.

“We are providing mitigation now while the patch is in development to prioritize the best interest of our customers. It is critical that you immediately take action to ensure you are fully protected,” the vendor said.

“We are aware of less than 10…

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Apple Releases Patches for Actively Exploited Flaws in iOS, macOS, and Safari

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Jun 22, 2023Ravie LakshmananVulnerability / Endpoint Security

iOS, macOS, and Safari

Apple on Wednesday released a slew of updates for iOS, iPadOS, macOS, watchOS, and Safari browser to address a set of flaws it said were actively exploited in the wild.

This includes a pair of zero-days that have been weaponized in a mobile surveillance campaign called Operation Triangulation that has been active since 2019. The exact threat actor behind the activity is not known.

  • CVE-2023-32434 – An integer overflow vulnerability in the Kernel that could be exploited by a malicious app to execute arbitrary code with kernel privileges.
  • CVE-2023-32435 – A memory corruption vulnerability in WebKit that could lead to arbitrary code execution when processing specially crafted web content.

The iPhone maker said it’s aware that the two issues “may have been actively exploited against versions of iOS released before iOS 15.7,” crediting Kaspersky researchers Georgy Kucherin, Leonid Bezvershenko, and Boris Larin for reporting them.

The advisory comes as the Russian cybersecurity vendor dissected the spyware implant used in the zero-click attack campaign targeting iOS devices via iMessages carrying an attachment embedded with an exploit for the kernel remote code execution (RCE) vulnerability.

The exploit code is also engineered to download additional components to obtain root privileges on the target device, after which the backdoor is deployed in memory and the initial iMessage is deleted to conceal the infection trail.

The sophisticated implant, called TriangleDB, operates solely in the memory, leaving no traces of the activity following a device reboot. It also comes with diverse data collection and tracking capabilities.

Cybersecurity

This includes “interacting with the device’s file system (including file creation, modification, exfiltration, and removal), managing processes (listing and termination), extracting keychain items to gather victim credentials, and monitoring the victim’s geolocation, among others.”

In an attempt to complete the attack puzzle and gather its different moving parts, Kaspersky has released a utility called “triangle_check” that organizations can use to scan iOS device backups and hunt for any signs of…

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Hackers Actively Exploiting Zero-Day in Fortra’s GoAnywhere MFT

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Feb 04, 2023Ravie LakshmananZero-Day / Vulnerability

Zero-Day in Fortra's GoAnywhere MFT

A zero-day vulnerability affecting Fortra’s GoAnywhere MFT managed file transfer application is being actively exploited in the wild.

Details of the flaw were first publicly shared by security reporter Brian Krebs on Mastodon. No public advisory has been published by Fortra.

The vulnerability is a case of remote code injection that requires access to the administrative console of the application, making it imperative that the systems are not exposed to the public internet.

According to security researcher Kevin Beaumont, there are over 1,000 on-premise instances that are publicly accessible over the internet, a majority of which are located in the U.S.

“The Fortra advisory Krebs quoted advises GoAnywhere MFT customers to review all administrative users and monitor for unrecognized usernames, especially those created by system,” Rapid7 researcher Caitlin Condon said.

“The logical deduction is that Fortra is likely seeing follow-on attacker behavior that includes the creation of new administrative or other users to take over or maintain persistence on vulnerable target systems.”

Alternatively, the cybersecurity company said it’s possible for threat actors to exploit reused, weak, or default credentials to obtain administrative access to the console.

There is no patch currently available for the zero-day vulnerability, although Fortra has released workarounds to remove the “License Response Servlet” configuration from the web.xml file.

Vulnerabilities in file transfer solutions have become appealing targets for threat actors, what with flaws in Accellion and FileZen weaponized for data theft and extortion.

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