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Microsoft Issues Patches for Actively Exploited Critical Vulnerabilities

Microsoft Issues Patches for Actively Exploited Critical Vulnerabilities

April 12, 2017Swati Khandelwal
Besides a previously undisclosed code-execution flaw in Microsoft Word, the tech giant patches two more zero-day vulnerabilities that attackers had been exploiting in the wild for months, as part of this month's Patch Tuesday . In total, Microsoft patches 45 unique vulnerabilities in its nine products, including three previously undisclosed vulnerabilities under active attack. The first vulnerability ( CVE-2017-0199 ) under attack is a remote-code execution flaw that could allow an attacker to remotely take over a fully patched and up to date computer when the victim opens a Word document containing a booby-trapped OLE2link object. The attack can bypass most exploit mitigations developed by Microsoft, and according to Ryan Hanson of security firm Optiv, in some cases, exploits can execute malicious code even when Protected View is enabled. As The Hacker News reported Monday, this code-execution flaw in Microsoft Word was being exploited by hackers to spread a version
Microsoft Says Russian Hackers Using Unpatched Windows Bug Disclosed by Google

Microsoft Says Russian Hackers Using Unpatched Windows Bug Disclosed by Google

November 02, 2016Swati Khandelwal
Google's Threat Analysis Group publically disclosed on Monday a critical zero-day vulnerability in most versions of Windows just 10 days after privately disclosed both zero days to Microsoft and Adobe. While Adobe rushed an emergency patch for its Flash Player software on October 26, Microsoft had yet to release a fix. Microsoft criticized Google's move, saying that the public disclosure of the vulnerability — which is being exploited in the wild — before the company had time to prepare a fix, puts Windows users at "potential risk." The result? Windows Vista through current versions of Windows 10 is still vulnerable , and now everybody knows about the critical vulnerability. Now, Microsoft said that the company would be releasing a patch for the zero-day flaw on 8th November, as part of its regular round of monthly security updates. Russian Hackers are actively exploiting critical Windows kernel bug Microsoft acknowledged the vulnerability in a blog
Microsoft Patches 5 Zero-Day Vulnerabilities Being Exploited in the Wild

Microsoft Patches 5 Zero-Day Vulnerabilities Being Exploited in the Wild

October 12, 2016Swati Khandelwal
Microsoft has released its monthly Patch Tuesday update including a total of 10 security bulletin, and you are required to apply the whole package of patches altogether, whether you like it or not. That's because the company is kicking off a controversial new all-or-nothing patch model this month by packaging all security updates into a single payload, removing your ability to pick and choose which individual patches to install. October's patch bundle includes fixes for at least 5 separate dangerous zero-day vulnerabilities in Internet Explorer, Edge, Windows and Office products that attackers were already exploiting in the wild before the patch release. The patches for these zero-day flaws are included in MS16-118, MS16-119, MS16-120, MS16-121 and MS16-126. All the zero-days are being exploited in the wild, allowing attackers to execute a remote command on victim's system. Although none of the zero-day flaws were publicly disclosed prior to Tuesday, the company wa
Microsoft pushes Emergency Patch for Zero-Day Internet Explorer Flaw

Microsoft pushes Emergency Patch for Zero-Day Internet Explorer Flaw

August 19, 2015Swati Khandelwal
It's time to immediately patch your Internet Explorer – Once again! Microsoft has issued an emergency out-of-band patch for all supported versions of Internet Explorer browser, to fix a critical security flaw that hackers are actively exploiting to hijack control of targeted computers. The Zero-Day flaw (assigned CVE-2015-2502 ) is a Remote Code Execution vulnerability that could be exploited when a user visits a booby-trapped website or open a malicious email on an affected machine. The security bug actually resides in the way Internet Explorer handles objects in memory. If successfully exploited, a hacker could gain the same user privileges as the current user. Therefore, users running administrator accounts on their machines as well as systems where IE is frequently used, like workstations or terminal servers, are particularly at the most risk from this vulnerability. Critical Zero-Day Vulnerability "An attacker who successfully exploited th
Firefox 31  — Mozilla Releases Security Updates to Tighten Browser Security

Firefox 31 — Mozilla Releases Security Updates to Tighten Browser Security

July 23, 2014Wang Wei
Mozilla has officially released its latest build Firefox 31 for all supported platforms, addressing 11 vulnerabilities in total, three of which are marked critical that could have been exploited by hackers to mount remote code execution attacks. Mozilla Firefox recommends its users to install the security update as soon as possible, warning that the three critical vulnerabilities discovered in its browser could be exploited by attackers and leverage them to " run attacker code and install software, requiring no user interaction beyond normal browsing ". CRITICAL VULNERABILITIES The three major vulnerabilities are as follows: MFSA 2014-62 - This is one of the three critical vulnerabilities reported by Patrick Cozzi and get fixed in the newer version of the browser. The vulnerability allows the exploitation of a WebGL crash with Cesium JavaScript library. Much details about the flaw are not known at the time, but Mozilla notes that the flaw cannot be exploi
Why Everyone Needs to Take the Latest CISA Directive Seriously

Why Everyone Needs to Take the Latest CISA Directive Seriously

December 03, 2021The Hacker News
Government agencies publish notices and directives all the time. Usually, these are only relevant to government departments, which means that nobody else really pays attention. It's easy to see why you would assume that a directive from CISA just doesn't relate to your organization. But, in the instance of the latest CISA directive, that would be making a mistake. In this article, we explain why, even if you're in the private or non-government sector, you should nonetheless take a close look at CISA Binding Operational Directive 22-01. We outline why CISA was forced to issue this directive, and why that firm action has implications for all organizations – inside and outside of government. Acting on cybersecurity issues isn't as simple as flicking a switch, of course, so keep reading to find out how you can address the core issue behind the CISA directive. Okay, so what exactly is a CISA directive? Let's take a step back to gain some context. Just like any organ
Microsoft Releases Patch for Actively Exploited Windows Zero-Day Vulnerability

Microsoft Releases Patch for Actively Exploited Windows Zero-Day Vulnerability

September 14, 2021Ravie Lakshmanan
A day after  Apple  and  Google  rolled out urgent security updates, Microsoft has  pushed software fixes  as part of its monthly Patch Tuesday release cycle to plug 66 security holes affecting Windows and other components such as Azure, Office, BitLocker, and Visual Studio, including an  actively exploited zero-day  in its MSHTML Platform that came to light last week.  Of the 66 flaws, three are rated Critical, 62 are rated Important, and one is rated Moderate in severity. This is aside from the  20 vulnerabilities  in the Chromium-based Microsoft Edge browser that the company addressed since the start of the month. The most important of the updates concerns a patch for  CVE-2021-40444  (CVSS score: 8.8), an actively exploited remote code execution vulnerability in MSHTML that leverages malware-laced Microsoft Office documents, with EXPMON researchers noting "the exploit uses logical flaws so the exploitation is perfectly reliable." Also addressed is a publicly disclose
CISA Warns of Actively Exploited Zoho ManageEngine ADSelfService Vulnerability

CISA Warns of Actively Exploited Zoho ManageEngine ADSelfService Vulnerability

September 08, 2021Ravie Lakshmanan
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Wednesday issued a bulletin warning of a zero-day flaw affecting Zoho ManageEngine ADSelfService Plus deployments that is currently being actively exploited in the wild. The flaw, tracked as  CVE-2021-40539 , concerns a REST API authentication bypass that could lead to arbitrary remote code execution (RCE). ADSelfService Plus builds up to 6113 are impacted. ManageEngine ADSelfService Plus is an integrated self-service password management and a single sign-on solution for Active Directory and cloud apps, enabling admins to enforce two-factor authentication for application logins and users to reset their passwords. "CVE-2021-40539 has been detected in exploits in the wild. A remote attacker could exploit this vulnerability to take control of an affected system," CISA  said , urging companies to apply the latest security update to their ManageEngine servers and "ensure ADSelfService Plus is not directl
Microsoft Says Chinese Hackers Were Behind SolarWinds Serv-U SSH 0-Day Attack

Microsoft Says Chinese Hackers Were Behind SolarWinds Serv-U SSH 0-Day Attack

September 04, 2021Ravie Lakshmanan
Microsoft has shared technical details about a now-fixed, actively exploited critical security vulnerability affecting SolarWinds Serv-U managed file transfer service that it has attributed with "high confidence" to a threat actor operating out of China. In mid-July, the Texas-based company  remedied  a remote code execution flaw ( CVE-2021-35211 ) that was rooted in Serv-U's implementation of the Secure Shell (SSH) protocol, which could be abused by attackers to run arbitrary code on the infected system, including the ability to install malicious programs and view, change, or delete sensitive data. "The Serv-U SSH server is subject to a pre-auth remote code execution vulnerability that can be easily and reliably exploited in the default configuration," Microsoft Offensive Research and Security Engineering team said in a  detailed write-up  describing the exploit. "An attacker can exploit this vulnerability by connecting to the open SSH port and sendin
Google Details iOS, Chrome, IE Zero-Day Flaws Exploited Recently in the Wild

Google Details iOS, Chrome, IE Zero-Day Flaws Exploited Recently in the Wild

July 15, 2021Ravie Lakshmanan
Threat intelligence researchers from Google on Wednesday  shed more light  on four in-the-wild zero-days in Chrome, Safari, and Internet Explorer browsers that were exploited by malicious actors in different campaigns since the start of the year. What's more, three of the four zero-days were engineered by commercial providers and sold to and used by government-backed actors, contributing to an uptick in real-world attacks. The list of now-patched vulnerabilities is as follows - CVE-2021-1879 : Use-After-Free in QuickTimePluginReplacement (Apple WebKit) CVE-2021-21166 : Chrome Object Lifecycle Issue in Audio CVE-2021-30551 : Chrome Type Confusion in V8 CVE-2021-33742 : Internet Explorer out-of-bounds write in MSHTML Both Chrome zero-days — CVE-2021-21166 and CVE-2021-30551 — are believed to have been used by the same actor, and were delivered as one-time links sent via email to targets located in Armenia, with the links redirecting unsuspecting users to attacker-controlled
Android Issues Patches for 4 New Zero-Day Bugs Exploited in the Wild

Android Issues Patches for 4 New Zero-Day Bugs Exploited in the Wild

May 19, 2021Ravie Lakshmanan
Google on Wednesday updated its May 2021 Android Security Bulletin to disclose that four of the security vulnerabilities that were patched earlier this month by Arm and Qualcomm may have been exploited in the wild as zero-days. "There are indications that CVE-2021-1905, CVE-2021-1906, CVE-2021-28663 and CVE-2021-28664 may be under limited, targeted exploitation," the search giant  said  in an updated alert. The four flaws impact  Qualcomm Graphics  and  Arm Mali GPU Driver  modules — CVE-2021-1905  (CVSS score: 8.4) - A use-after-free flaw in Qualcomm's graphics component due to improper handling of memory mapping of multiple processes simultaneously. CVE-2021-1906  (CVSS score: 6.2) - A flaw concerning inadequate handling of address deregistration that could lead to new GPU address allocation failure. CVE-2021-28663  (CVSS score: NA) - A vulnerability in Arm Mali GPU kernel that could permit a non-privileged user to make improper operations on GPU memory, leading
ALERT — New 21Nails Exim Bugs Expose Millions of Email Servers to Hacking

ALERT — New 21Nails Exim Bugs Expose Millions of Email Servers to Hacking

May 05, 2021Ravie Lakshmanan
The maintainers of Exim have  released patches  to remediate as many as 21 security vulnerabilities in its software that could enable unauthenticated attackers to achieve complete remote code execution and gain root privileges. Collectively named  '21Nails ,' the flaws include 11 vulnerabilities that require local access to the server and 10 other weaknesses that could be exploited remotely. The issues were discovered by Qualys and reported to Exim on Oct. 20, 2020. "Some of the vulnerabilities can be chained together to obtain a full remote unauthenticated code execution and gain root privileges on the Exim Server," Bharat Jogi, senior manager at Qualys, said in a public disclosure. "Most of the vulnerabilities discovered by the Qualys Research Team for e.g. CVE-2020-28017 affects all versions of Exim going back all the way to 2004." Exim is a popular mail transfer agent (MTA) used on Unix-like operating systems, with over 60% of the publicly reachable
Microsoft Issues Patches for Defender Zero-Day and 82 Other Windows Flaws

Microsoft Issues Patches for Defender Zero-Day and 82 Other Windows Flaws

January 12, 2021Ravie Lakshmanan
For the first patch Tuesday of 2021, Microsoft released  security updates  addressing a total of 83 flaws spanning as many as 11 products and services, including an actively exploited zero-day vulnerability. The latest security patches cover Microsoft Windows, Edge browser, ChakraCore, Office and Microsoft Office Services, and Web Apps, Visual Studio, Microsoft Malware Protection Engine, .NET Core, ASP .NET, and Azure. Of these 83 bugs, 10 are listed as Critical, and 73 are listed as Important in severity. The most severe of the issues is a remote code execution (RCE) flaw in Microsoft Defender ( CVE-2021-1647 ) that could allow attackers to infect targeted systems with arbitrary code. Microsoft Malware Protection Engine (mpengine.dll) provides the scanning, detection, and cleaning capabilities for Microsoft Defender antivirus and antispyware software. The last version of the software affected by the flaw is 1.1.17600.5, before it was addressed in version 1.1.17700.4. The bug is
WARNING: Google Discloses Windows Zero-Day Bug Exploited in the Wild

WARNING: Google Discloses Windows Zero-Day Bug Exploited in the Wild

November 02, 2020Ravie Lakshmanan
Google has disclosed details of a new zero-day privilege escalation flaw in the Windows operating system that's being actively exploited in the wild. The elevation of privileges (EoP) vulnerability, tracked as  CVE-2020-17087 , concerns a buffer overflow present since at least Windows 7 in the Windows Kernel Cryptography Driver ("cng.sys") that can be exploited for a sandbox escape. "The bug resides in the cng!CfgAdtpFormatPropertyBlock function and is caused by a 16-bit integer truncation issue," Google's Project Zero researchers Mateusz Jurczyk and Sergei Glazunov noted in their technical write-up. The security team made the details public following a seven-day disclosure deadline because of evidence that it's under active exploit. Project Zero has shared a proof-of-concept exploit (PoC) that can be used to corrupt kernel data and crash vulnerable Windows devices even under default system configurations. What's notable is that the exploit ch
Cisco Jabber Bug Could Let Hackers Target Windows Systems Remotely

Cisco Jabber Bug Could Let Hackers Target Windows Systems Remotely

September 03, 2020Ravie Lakshmanan
Networking equipment maker Cisco has released a new version of its Jabber video conferencing and messaging app for Windows that includes patches for multiple vulnerabilities—which, if exploited, could allow an authenticated, remote attacker to execute arbitrary code. The flaws, which were uncovered by Norwegian cybersecurity firm Watchcom during a pentest, affect all currently supported versions of the Jabber client (12.1-12.9) and has since been fixed by the company. Two of the four flaws can be exploited to gain remote code execution (RCE) on target systems by sending specially crafted chat messages in group conversations or specific individuals. The most severe of the lot is a flaw (CVE-2020-3495, CVSS score 9.9) that's caused by improper validation of message contents, which could be leveraged by an attacker by sending maliciously-crafted Extensible Messaging and Presence Protocol ( XMPP ) messages to the affected software. "A successful exploit could allow the
Hackers Exploited Twitter Bug to Find Linked Phone Numbers of Users

Hackers Exploited Twitter Bug to Find Linked Phone Numbers of Users

February 04, 2020Wang Wei
Twitter today issued a warning revealing that attackers abused a legitimate functionality on its platform to unauthorizedly determine phone numbers associated with millions of its users' accounts. According to Twitter, the vulnerability resided in one of the APIs that has been designed to make it easier for users to find people they may already know on Twitter by matching phone numbers saved in their contacts with twitter accounts. To be noted, the feature worked precisely as intended, except someone was not supposed to upload millions of randomly generated phone numbers and abuse Twitter to reveal profiles associated with the contact information users added to Twitter for enabling security features. Though the company is not sure if the bug was exploited by only a single adversary or multiple groups, it has identified several accounts engaged in the attack located in a wide range of countries, primarily from Iran, Israel, and Malaysia. Based on their IP addresses, Twitt
Hackers Breach ZoneAlarm's Forum Site — Outdated vBulletin to Blame

Hackers Breach ZoneAlarm's Forum Site — Outdated vBulletin to Blame

November 11, 2019Swati Khandelwal
ZoneAlarm, an internet security software company owned by Israeli cybersecurity firm Check Point Technologies, has suffered a data breach exposing data of its discussion forum users, the company confirmed The Hacker News. With nearly 100 million downloads, ZoneAlarm offers antivirus software, firewall, and additional virus protection solutions to home PC users, small businesses, and mobile phones worldwide. Though neither ZoneAlarm or its parent company Check Point has yet publicly disclosed the security incident, the company quietly sent an alert via email to all affected users over this weekend, The Hacker News learned. The email-based breach notification advised ZoneAlarm forum users to immediately change their forum account passwords, informing them hackers have unauthorizedly gained access to their names, email addresses, hashed passwords, and date of births. Moreover, the company has also clarified that the security incident only affects users registered with the "
Adobe Releases Out-of-Band Security Patches for 82 Flaws in Various Products

Adobe Releases Out-of-Band Security Patches for 82 Flaws in Various Products

October 15, 2019Swati Khandelwal
No, it's not a patch Tuesday. It's the third Tuesday of the month, and as The Hacker News shared an early heads-up late last week on Twitter, Adobe today finally released pre-announced out-of-band security updates to patch a total of 82 security vulnerabilities across its various products. The affected products that received security patches today include: Adobe Acrobat and Reader Adobe Experience Manager Adobe Experience Manager Forms Adobe Download Manager Out of 82 security vulnerabilities, 45 are rated critical, and all of them affect Adobe Acrobat and Reader and which, if exploited successfully, could lead to arbitrary code execution in the context of the current user. A majority of critical-rated vulnerabilities (i.e., 26) in Adobe Acrobat and Reader reside due to use-after-free, 6 due to out-of-bounds write, 4 are type confusion bugs, 4 due to untrusted pointer dereference, 3 are heap overflow bugs, one buffer overrun and one race condition issue. Ad
New 0-Day Flaw Affecting Most Android Phones Being Exploited in the Wild

New 0-Day Flaw Affecting Most Android Phones Being Exploited in the Wild

October 04, 2019Mohit Kumar
Another day, another revelation of a critical unpatched zero-day vulnerability, this time in the world's most widely used mobile operating system, Android. What's more? The Android zero-day vulnerability has also been found to be exploited in the wild by the Israeli surveillance vendor NSO Group—infamous for selling zero-day exploits to governments—or one of its customers, to gain control of their targets' Android devices. Discovered by Project Zero researcher Maddie Stone, the details and a proof-of-concept exploit for the high-severity security vulnerability, tracked as CVE-2019-2215, has been made public today—just seven days after reporting it to the Android security team. The zero-day is a use-after-free vulnerability in the Android kernel's binder driver that can allow a local privileged attacker or an app to escalate their privileges to gain root access to a vulnerable device and potentially take full remote control of the device. Vulnerable Android D
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