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Critical Exchange Server Flaw (CVE-2024-21410) Under Active Exploitation

Critical Exchange Server Flaw (CVE-2024-21410) Under Active Exploitation
Feb 15, 2024 Threat Intelligence / Vulnerability
Microsoft on Wednesday acknowledged that a newly disclosed critical security flaw in Exchange Server has been actively exploited in the wild, a day after it released fixes for the vulnerability as part of its  Patch Tuesday updates . Tracked as  CVE-2024-21410  (CVSS score: 9.8), the issue has been described as a case of privilege escalation impacting the Exchange Server. "An attacker could target an NTLM client such as Outlook with an NTLM credentials-leaking type vulnerability," the company  said  in an advisory published this week. "The leaked credentials can then be relayed against the Exchange server to gain privileges as the victim client and to perform operations on the Exchange server on the victim's behalf." Successful exploitation of the flaw could permit an attacker to relay a user's leaked Net-NTLMv2 hash against a susceptible Exchange Server and authenticate as the user, Redmond added. The tech giant, in an update to its bulletin, revised

Microsoft Rolls Out Patches for 73 Flaws, Including 2 Windows Zero-Days

Microsoft Rolls Out Patches for 73 Flaws, Including 2 Windows Zero-Days
Feb 14, 2024 Patch Tuesday / Vulnerability
Microsoft has released patches to address  73 security flaws  spanning its software lineup as part of its Patch Tuesday updates for February 2024, including two zero-days that have come under active exploitation. Of the 73 vulnerabilities, 5 are rated Critical, 65 are rated Important, and three and rated Moderate in severity. This is in addition to  24 flaws  that have been fixed in the Chromium-based Edge browser since the release of the January 2024 Patch Tuesday updates . The two flaws that are listed as under active attack at the time of release are below - CVE-2024-21351  (CVSS score: 7.6) - Windows SmartScreen Security Feature Bypass Vulnerability CVE-2024-21412  (CVSS score: 8.1) - Internet Shortcut Files Security Feature Bypass Vulnerability "The vulnerability allows a malicious actor to inject code into  SmartScreen  and potentially gain code execution, which could potentially lead to some data exposure, lack of system availability, or both," Microsoft said a

Midnight Blizzard and Cloudflare-Atlassian Cybersecurity Incidents: What to Know

Midnight Blizzard and Cloudflare-Atlassian Cybersecurity Incidents: What to Know
Feb 13, 2024SaaS Security / Data Breach
The Midnight Blizzard and Cloudflare-Atlassian cybersecurity incidents raised alarms about the vulnerabilities inherent in major SaaS platforms. These incidents illustrate the stakes involved in SaaS breaches — safeguarding the integrity of SaaS apps and their sensitive data is critical but is not easy. Common threat vectors such as sophisticated spear-phishing, misconfigurations and vulnerabilities in third-party app integrations demonstrate the complex security challenges facing IT systems. In the case of Midnight Blizzard, password spraying against a test environment was the initial attack vector. For Cloudflare-Atlassian, threat actors initiated the attack via compromised  OAuth tokens  from a prior breach at Okta, a SaaS identity security provider.  What Exactly Happened? Microsoft Midnight Blizzard Breach Microsoft was targeted by the Russian "Midnight Blizzard" hackers (also known as Nobelium, APT29, or Cozy Bear) who are linked to the SVR, the Kremlin's forei

Act Now: CISA Flags Active Exploitation of Microsoft SharePoint Vulnerability

Act Now: CISA Flags Active Exploitation of Microsoft SharePoint Vulnerability
Jan 12, 2024 Cyber Attack / Vulnerability
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has  added  a critical security vulnerability impacting Microsoft SharePoint Server to its Known Exploited Vulnerabilities ( KEV ) catalog, citing evidence of active exploitation. The issue, tracked as  CVE-2023-29357  (CVSS score: 9.8), is a privilege escalation flaw that could be exploited by an attacker to gain administrator privileges. Microsoft  released patches  for the bug as part of its June 2023 Patch Tuesday updates. "An attacker who has gained access to spoofed JWT authentication tokens can use them to execute a network attack which bypasses authentication and allows them to gain access to the privileges of an authenticated user," Redmond said. "The attacker needs no privileges nor does the user need to perform any action." Security researcher Nguyễn Tiến Giang (Jang) of StarLabs SG  demonstrated an exploit  for the flaw at the Pwn2Own Vancouver hacking contest last year, earning a $100,000 prize. The  pr

The Critical State of AI in the Cloud

cyber security
websiteWiz.ioArtificial Intelligence / Cloud Security
Wiz Research reveals the explosive growth of AI adoption and what 150,000+ cloud accounts revealed about the AI surge.

Microsoft's January 2024 Windows Update Patches 48 New Vulnerabilities

Microsoft's January 2024 Windows Update Patches 48 New Vulnerabilities
Jan 10, 2024 Vulnerability / Windows Security
Microsoft has addressed a total of  48 security flaws  spanning its software as part of its Patch Tuesday updates for January 2024. Of the 48 bugs, two are rated Critical and 46 are rated Important in severity. There is no evidence that any of the issues are publicly known or under active attack at the time of release, making it the second consecutive Patch Tuesday with no zero-days. The fixes are in addition to  nine security vulnerabilities  that have been resolved in the Chromium-based Edge browser since the release of  December 2023 Patch Tuesday  updates. This also includes a fix for a zero-day ( CVE-2023-7024 , CVSS score: 8.8) that Google said has been actively exploited in the wild. The most critical among the flaws patched this month are as follows - CVE-2024-20674  (CVSS score: 9.0) - Windows Kerberos Security Feature Bypass Vulnerability CVE-2024-20700  (CVSS score: 7.5) - Windows Hyper-V Remote Code Execution Vulnerability "The authentication feature could be bypas

Microsoft's Final 2023 Patch Tuesday: 34 Flaws Fixed, Including 4 Critical

Microsoft's Final 2023 Patch Tuesday: 34 Flaws Fixed, Including 4 Critical
Dec 13, 2023 Patch Tuesday / Windows Security
Microsoft released its final set of Patch Tuesday updates for 2023, closing out 34 flaws in its software, making it one of the lightest releases in recent years. Of the 34 shortcomings, four are rated Critical and 30 are rated Important in severity. The fixes are in addition to  18 flaws  Microsoft addressed in its Chromium-based Edge browser since the release of  Patch Tuesday updates for November 2023 . According to data from the  Zero Day Initiative , the software giant has patched more than 900 flaws this year, making it one of the busiest years for Microsoft patches. For comparison, Redmond resolved 917 CVEs in 2022. While none of the vulnerabilities are listed as publicly known or under active attack at the time of release, some of the notable ones are listed below - CVE-2023-35628  (CVSS score: 8.1) - Windows MSHTML Platform Remote Code Execution Vulnerability CVE-2023-35630  (CVSS score: 8.8) - Internet Connection Sharing (ICS) Remote Code Execution Vulnerability CVE-2

Alert: Microsoft Releases Patch Updates for 5 New Zero-Day Vulnerabilities

Alert: Microsoft Releases Patch Updates for 5 New Zero-Day Vulnerabilities
Nov 15, 2023 Patch Tuesday / Zero-Day
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 Core Denial of Service Vulnerability CV

Microsoft Releases October 2023 Patches for 103 Flaws, Including 2 Active Exploits

Microsoft Releases October 2023 Patches for 103 Flaws, Including 2 Active Exploits
Oct 11, 2023 Vulnerability / Endpoint Security
Microsoft has released its Patch Tuesday updates for October 2023, addressing a total of  103 flaws  in its software, two of which have come under active exploitation in the wild. Of the 103 flaws, 13 are rated Critical and 90 are rated Important in severity. This is apart from  18 security vulnerabilities  addressed in its Chromium-based Edge browser since the second Tuesday of September. The two vulnerabilities that have been weaponized as zero-days are as follows - CVE-2023-36563  (CVSS score: 6.5) - An information disclosure vulnerability in Microsoft WordPad that could result in the leak of NTLM hashes CVE-2023-41763  (CVSS score: 5.3) - A privilege escalation vulnerability in Skype for Business that could lead to exposure of sensitive information such as IP addresses or port numbers (or both), enabling threat actors to gain access to internal networks "To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a sp

Microsoft Warns of Nation-State Hackers Exploiting Critical Atlassian Confluence Vulnerability

Microsoft Warns of Nation-State Hackers Exploiting Critical Atlassian Confluence Vulnerability
Oct 11, 2023 Cyber Attack / Vulnerability
Microsoft has linked the exploitation of a recently disclosed critical flaw in Atlassian Confluence Data Center and Server to a nation-state actor it tracks as  Storm-0062  (aka DarkShadow or Oro0lxy). The tech giant's threat intelligence team said it observed in-the-wild abuse of the vulnerability since September 14, 2023. "CVE-2023-22515 is a critical privilege escalation vulnerability in Atlassian Confluence Data Center and Server," the company  noted  in a series of posts on X (formerly Twitter). "Any device with a network connection to a vulnerable application can exploit CVE-2023-22515 to create a Confluence administrator account within the application." CVE-2023-22515 , rated 10.0 on the CVSS severity rating system, allows  remote attackers  to create unauthorized Confluence administrator accounts and access Confluence servers. The flaw has been addressed in the following versions - 8.3.3 or later 8.4.3 or later, and 8.5.2 (Long Term Support rel

Microsoft Releases Patch for Two New Actively Exploited Zero-Days Flaws

Microsoft Releases Patch for Two New Actively Exploited Zero-Days Flaws
Sep 13, 2023 Endpoint Security / Zero Day
Microsoft has released software fixes to  remediate 59 bugs  spanning its product portfolio, including two zero-day flaws that have been actively exploited by malicious cyber actors. Of the 59 vulnerabilities, five are rated Critical, 55 are rated Important, and one is rated Moderate in severity. The update is in addition to  35 flaws  patched in the Chromium-based Edge browser since last month's Patch Tuesday edition, which also encompasses a fix for  CVE-2023-4863 , a critical heap buffer overflow flaw in the WebP image format. The two Microsoft vulnerabilities that have come under active exploitation in real-world attacks are listed below - CVE-2023-36761  (CVSS score: 6.2) - Microsoft Word Information Disclosure Vulnerability CVE-2023-36802  (CVSS score: 7.8) - Microsoft Streaming Service Proxy Elevation of Privilege Vulnerability "Exploiting this vulnerability could allow the disclosure of  NTLM hashes ," the Windows maker said in an advisory about CVE-2023-3

Update Adobe Acrobat and Reader to Patch Actively Exploited Vulnerability

Update Adobe Acrobat and Reader to Patch Actively Exploited Vulnerability
Sep 13, 2023 Vulnerability / Zero Day
Adobe's  Patch Tuesday update  for September 2023 comes with a patch for a critical actively exploited security flaw in Acrobat and Reader that could permit an attacker to execute malicious code on susceptible systems. The vulnerability, tracked as CVE-2023-26369, is rated 7.8 for severity on the CVSS scoring system and impacts both Windows and macOS versions of Acrobat DC, Acrobat Reader DC, Acrobat 2020, and Acrobat Reader 2020. Described as an out-of-bounds write, successful exploitation of the bug could lead to code execution by opening a specially crafted PDF document. Adobe did not disclose any additional details about the issue or the targeting involved. "Adobe is aware that CVE-2023-26369 has been exploited in the wild in limited attacks targeting Adobe Acrobat and Reader," the company  acknowledged  in an advisory. CVE-2023-26369 affects the below versions - Acrobat DC (23.003.20284 and earlier versions) - Fixed in 23.006.20320 Acrobat Reader DC (23.003.

Microsoft Releases Patches for 74 New Vulnerabilities in August Update

Microsoft Releases Patches for 74 New Vulnerabilities in August Update
Aug 09, 2023 Software Security / Vulnerability
Microsoft has patched a total of  74 flaws  in its software as part of the company's Patch Tuesday updates for August 2023, down from the voluminous 132 vulnerabilities the company fixed last month. This comprises six Critical, 67 Important, and one Moderate severity vulnerabilities. Released along with the security improvements are two defense-in-depth updates for Microsoft Office ( ADV230003 ) and the Memory Integrity System Readiness Scan Tool ( ADV230004 ). The updates are also in addition to 30 issues addressed by Microsoft in its Chromium-based Edge browser since last month's Patch Tuesday edition and one side-channel flaw impacting certain processor models offered by AMD ( CVE-2023-20569  or  Inception ). ADV230003 concerns an already known security flaw tracked as  CVE-2023-36884 , a remote code execution vulnerability in Office and Windows HTML that has been actively exploited by the Russia-linked RomCom threat actor in attacks targeting Ukraine as well as pro-Ukr
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