Headline
Microsoft Releases Patch for Two New Actively Exploited Zero-Days Flaws
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
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-2023-36761, stating CVE-2023-36802 could be abused by an attacker to gain SYSTEM privileges.
Exact details surrounding the nature of the exploitation or the identity of the threat actors behind the attacks are currently unknown.
“Exploitation of [CVE-2023-36761] is not just limited to a potential target opening a malicious Word document, as simply previewing the file can cause the exploit to trigger,” Satnam Narang, senior staff research engineer at Tenable, said. Exploitation would allow for the disclosure of New Technology LAN Manager (NTLM) hashes."
“The first was CVE-2023-23397, an elevation of privilege vulnerability in Microsoft Outlook, that was disclosed in the March Patch Tuesday release.”
Other vulnerabilities of note are several remote code execution flaws impacting Internet Connection Sharing (ICS), Visual Studio, 3D Builder, Azure DevOps Server, Windows MSHTML, and Microsoft Exchange Server and elevation of privilege issues in Windows Kernel, Windows GDI, Windows Common Log File System Driver, and Office, among others.
Software Patches from Other Vendors
Other than Microsoft, security updates have also been released by other vendors over the past few weeks to rectify several vulnerabilities, including -
- Adobe
- Android
- Apache Projects
- Apple
- Aruba Networks
- ASUS
- Cisco
- Citrix
- Dell
- Drupal
- F5
- GitLab
- Google Chrome
- Hitachi Energy
- HP
- IBM
- Jenkins
- Juniper Networks
- Lenovo
- Linux distributions Debian, Oracle Linux, Red Hat, SUSE, and Ubuntu
- MediaTek
- Mitsubishi Electric
- Mozilla Firefox, Firefox ESR, and Thunderbird
- NETGEAR
- Notepad++
- NVIDIA
- Qualcomm
- Samsung
- SAP
- Schneider Electric
- Siemens
- SolarWinds
- Splunk
- Spring Framework
- Synology
- TP-Link
- Trend Micro
- Veeam
- VMware
- Zimbra, and
- Zoom
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Debian Linux Security Advisory 5497-2 - A buffer overflow in parsing WebP images may result in the execution of arbitrary code.
Debian Linux Security Advisory 5498-1 - A buffer overflow in parsing WebP images may result in the execution of arbitrary code.
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Ubuntu Security Notice 6368-1 - Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, bypass security restrictions, cross-site tracing, or execute arbitrary code. It was discovered that Thunderbird did not properly manage memory when handling WebP images. If a user were tricked into opening a malicious WebP image file, an attacker could potentially exploit these to cause a denial of service or execute arbitrary code.
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Debian Linux Security Advisory 5496-1 - A buffer overflow in parsing WebP images may result in the execution of arbitrary code.
Categories: Business Categories: Exploits and vulnerabilities Categories: News Tags: Microsoft Tags: Adobe Tags: Android Tags: Apple Tags: Chrome Tags: SAP Tags: Exchange Tags: Visual Studio Tags: CVE-2023-36761 Tags: CVE-2023-36802 Tags: CVE-2023-29332 Tags: Azure Microsoft's September 2023 Patch Tuesday is another important one. It patches two vulnerabilities which are known to be actively exploited. (Read more...) The post Patch now! September Microsoft Patch Tuesday includes two actively exploited zero-days appeared first on Malwarebytes Labs.
Mozilla on Tuesday released security updates to resolve a critical zero-day vulnerability in Firefox and Thunderbird that has been actively exploited in the wild, a day after Google released a fix for the issue in its Chrome browser. The shortcoming, assigned the identifier CVE-2023-4863, is a heap buffer overflow flaw in the WebP image format that could result in arbitrary code execution when
Microsoft today issued software updates to fix at least five dozen security holes in Windows and supported software, including patches for two zero-day vulnerabilities that are already being exploited. Also, Adobe, Google Chrome and Apple iOS users may have their own zero-day patching to do.
Microsoft today issued software updates to fix at least five dozen security holes in Windows and supported software, including patches for two zero-day vulnerabilities that are already being exploited. Also, Adobe, Google Chrome and Apple iOS users may have their own zero-day patching to do.
Microsoft disclosed 65 vulnerabilities across its suite of products and software Tuesday, only five of which are considered critical, which is very low compared to Microsoft’s usual security updates.
Microsoft disclosed 65 vulnerabilities across its suite of products and software Tuesday, only five of which are considered critical, which is very low compared to Microsoft’s usual security updates.
Microsoft Streaming Service Proxy Elevation of Privilege Vulnerability
Microsoft Word Information Disclosure Vulnerability
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Heap buffer overflow in WebP in Google Chrome prior to 116.0.5845.187 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: Critical)
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Categories: Exploits and vulnerabilities Categories: News Tags: Google Tags: Chrome Tags: CVE-2023-4863 Tags: WebP Tags: buffer overflow Tags: 116.0.5845.187/.188 Chrome users are being urged to patch a critical vulnerability for which an exploit is available. (Read more...) The post Update Chrome now! Google patches critical vulnerability being exploited in the wild appeared first on Malwarebytes Labs.
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Categories: Exploits and vulnerabilities Categories: News Tags: patch Tuesday Tags: March Tags: 2023 Tags: Microsoft Tags: Adobe Tags: Fortinet Tags: Android Tags: SAP Tags: CVE-2023-23397 Tags: CVE-2023-24880 Tags: CVE-2023-26360 Tags: CVE-2022-41328 This Patch Tuesday, Microsoft has released fixes for two actively exploited zero-days and Adobe has fixed one. (Read more...) The post Update now! Microsoft fixes two zero-day bugs appeared first on Malwarebytes Labs.
Microsoft Outlook Elevation of Privilege Vulnerability
May 9, 2023 update: Releases for Microsoft Products has been updated with the release of CVE-2023-29324 - Security Update Guide - Microsoft - Windows MSHTML Platform Security Feature Bypass Vulnerability March 24, 2023 update: Impact Assessment has been updated to a link to Guidance for investigating attacks using CVE-2023-23397 - Microsoft Security Blog.