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The Hacker News - Cybersecurity News and Analysis: zero-day attack

Update Google Chrome to Patch 2 New Zero-Day Flaws Under Attack

Update Google Chrome to Patch 2 New Zero-Day Flaws Under Attack

September 13, 2021Ravie Lakshmanan
Google on Monday released security updates for Chrome web browser to address a total of 11 security issues, two of which it says are actively exploited zero-days in the wild. Tracked as  CVE-2021-30632  and  CVE-2021-30633 , the  vulnerabilities  concern an out of bounds write in V8 JavaScript engine and a use after free flaw in Indexed DB API respectively, with the internet giant crediting anonymous researchers for reporting the bugs on September 8. As is typically the case, the company said it's "aware that exploits for CVE-2021-30632 and CVE-2021-30633 exist in the wild" without sharing additional specifics about how, when, and where the vulnerabilities were exploited, or the threat actors that may be abusing them. With these two security shortcomings, Google has addressed a total of 11 zero-day vulnerabilities in Chrome since the start of the year — CVE-2021-21148  - Heap buffer overflow in V8 CVE-2021-21166  - Object recycle issue in audio CVE-2021-21193  -
Update Your Windows Computers to Patch 6 New In-the-Wild Zero-Day Bugs

Update Your Windows Computers to Patch 6 New In-the-Wild Zero-Day Bugs

June 08, 2021Ravie Lakshmanan
Microsoft on Tuesday released another round of  security updates  for Windows operating system and other supported software, squashing 50 vulnerabilities, including six zero-days that are said to be under active attack. The flaws were identified and resolved in Microsoft Windows, .NET Core and Visual Studio, Microsoft Office, Microsoft Edge (Chromium-based and EdgeHTML), SharePoint Server, Hyper-V, Visual Studio Code - Kubernetes Tools, Windows HTML Platform, and Windows Remote Desktop. Of these 50 bugs, five are rated Critical, and 45 are rated Important in severity, with three of the issues publicly known at the time of release. The vulnerabilities that being actively exploited are listed below - CVE-2021-33742  (CVSS score: 7.5) - Windows MSHTML Platform Remote Code Execution Vulnerability CVE-2021-33739  (CVSS score: 8.4) - Microsoft DWM Core Library Elevation of Privilege Vulnerability CVE-2021-31199  (CVSS score: 5.2) - Microsoft Enhanced Cryptographic Provider Elevation
Microsoft Warns of Unpatched IE Browser Zero-Day That's Under Active Attacks

Microsoft Warns of Unpatched IE Browser Zero-Day That's Under Active Attacks

January 18, 2020Mohit Kumar
Internet Explorer is dead, but not the mess it left behind. Microsoft earlier today issued an emergency security advisory warning millions of Windows users of a new zero-day vulnerability in Internet Explorer (IE) browser that attackers are actively exploiting in the wild — and there is no patch yet available for it. The vulnerability, tracked as CVE-2020-0674 and rated moderated, is a remote code execution issue that exists in the way the scripting engine handles objects in memory of Internet Explorer and triggers through JScript.dll library. A remote attacker can execute arbitrary code on targeted computers and take full control over them just by convincing victims into opening a maliciously crafted web page on the vulnerable Microsoft browser. "The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as
New Chrome 0-day Bug Under Active Attacks – Update Your Browser Now!

New Chrome 0-day Bug Under Active Attacks – Update Your Browser Now!

November 01, 2019Swati Khandelwal
Attention readers, if you are using Chrome on your Windows, Mac, and Linux computers, you need to update your web browsing software immediately to the latest version Google released earlier today. With the release of Chrome 78.0.3904.87, Google is warning billions of users to install an urgent software update immediately to patch two high severity vulnerabilities, one of which attackers are actively exploiting in the wild to hijack computers. Without revealing technical details of the vulnerability, the Chrome security team only says that both issues are use-after-free vulnerabilities, one affecting Chrome's audio component ( CVE-2019-13720 ) while the other resides in the PDFium ( CVE-2019-13721 ) library. The use-after-free vulnerability is a class of memory corruption issues that allows corruption or modification of data in the memory, enabling an unprivileged user to escalate privileges on an affected system or software. Thus, both flaws could enable remote attackers
Microsoft Releases Emergency Patches for IE 0-Day and Windows Defender Flaw

Microsoft Releases Emergency Patches for IE 0-Day and Windows Defender Flaw

September 24, 2019Swati Khandelwal
It's not a Patch Tuesday, but Microsoft is rolling out emergency out-of-band security patches for two new vulnerabilities, one of which is a critical Internet Explorer zero-day that cyber criminals are actively exploiting in the wild. Discovered by Clément Lecigne of Google's Threat Analysis Group and tracked as CVE-2019-1367, the IE zero-day is a remote code execution vulnerability in the way Microsoft's scripting engine handles objects in memory in Internet Explorer. The vulnerability is a memory-corruption issue that could allow a remote attacker to hijack a Windows PC just by convincing the user into viewing a specially crafted, booby-trapped web-page hosted online, when using Internet Explorer. "An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affec
Tor Browser 8.5.2 Released — Update to Fix Critical Firefox Vulnerability

Tor Browser 8.5.2 Released — Update to Fix Critical Firefox Vulnerability

June 20, 2019Mohit Kumar
Important Update (21 June 2019) ➤  The Tor Project on Friday released second update ( Tor Browser 8.5.3 ) for its privacy web-browser that patches the another Firefox zero-day vulnerability patched this week. Following the latest critical update for Firefox, the Tor Project today released an updated version of its anonymity and privacy browser to patch the same Firefox vulnerability in its bundle. Earlier this week, Mozilla released Firefox 67.0.3 and Firefox ESR 60.7.1 versions to patch a critical actively-exploited vulnerability ( CVE-2019-11707 ) that could allow attackers to remotely take full control over systems running the vulnerable browser versions. Besides updating Firefox, the latest Tor Browser 8.5.2 for desktops also includes updated NoScript version 10.6.3 that fixes a few known issues. According to the Tor Project Team, if you are already using Tor browser with "safer" and "safest" security levels, the flaw doesn't affect you. For som
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