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March 17, 2023Severity High Analysis Summary Chaos is a customizable ransomware builder that emerged on June 9 2021 (in underground forums) by falsely marketing itself as the .NET […]March 17, 2023Severity High Analysis Summary CVE-2023-26361 CVSS:4.9 Adobe ColdFusion could allow a remote authenticated attacker to traverse directories on the system. An attacker could send a specially […]March 17, 2023Severity Medium Analysis Summary Ursnif banking trojan also known as Gozi and Dreambot has been around for more than 10 years. It gained popularity in 2015 […]Threat Insights
Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.
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Platform
Managed Security Services
Managed Penetration Testing
Rewterz penetration testing services help organizations determine if a cyber attacker can gain access to their critical assets while giving them detailed insights of the overall business impact of a cyber attack.
Resources
March 17, 2023Severity High Analysis Summary Chaos is a customizable ransomware builder that emerged on June 9 2021 (in underground forums) by falsely marketing itself as the .NET […]March 17, 2023Severity High Analysis Summary CVE-2023-26361 CVSS:4.9 Adobe ColdFusion could allow a remote authenticated attacker to traverse directories on the system. An attacker could send a specially […]March 17, 2023Severity Medium Analysis Summary Ursnif banking trojan also known as Gozi and Dreambot has been around for more than 10 years. It gained popularity in 2015 […]Threat Insights
Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.
Connect with Us
Rewterz Threat Alert – Bitter APT Threat Actors – Active IOCs
January 17, 2023Rewterz Threat Advisory – Multiple Microsoft Windows Internet Key Exchange (IKE) Extension Vulnerabilities
January 17, 2023
Severity
High
Analysis Summary
CVE-2023-21757 CVSS:7.5
Microsoft Windows is vulnerable to a denial of service, caused by a flaw in the Layer 2 Tunneling Protocol (L2TP). By sending a specially-crafted request, a remote attacker could exploit this vulnerability to cause a denial of service condition.
CVE-2023-21555 CVSS:8.1
Microsoft Windows could allow a remote attacker to execute arbitrary code on the system, caused by a flaw in the Layer 2 Tunneling Protocol (L2TP). By sending a specially-crafted request to a RAS server, an attacker could exploit this vulnerability to execute arbitrary code on the RAS server machine.
CVE-2023-21546 CVSS:8.1
Microsoft Windows could allow a remote attacker to execute arbitrary code on the system, caused by a flaw in the Layer 2 Tunneling Protocol (L2TP). By sending a specially-crafted request to a RAS server, an attacker could exploit this vulnerability to execute arbitrary code on the RAS server machine.
CVE-2023-21679 CVSS:8.1
Microsoft Windows could allow a remote attacker to execute arbitrary code on the system, caused by a flaw in the Layer 2 Tunneling Protocol (L2TP). By sending a specially-crafted request to a RAS server, an attacker could exploit this vulnerability to execute arbitrary code on the RAS server machine.
CVE-2023-21556 CVSS:8.1
Microsoft Windows could allow a remote attacker to execute arbitrary code on the system, caused by a flaw in the Layer 2 Tunneling Protocol (L2TP). By sending a specially-crafted request to a RAS server, an attacker could exploit this vulnerability to execute arbitrary code on the RAS server machine.
CVE-2023-21543 CVSS:8.1
Microsoft Windows could allow a remote attacker to execute arbitrary code on the system, caused by a flaw in the Layer 2 Tunneling Protocol (L2TP). By sending a specially-crafted request to a RAS server, an attacker could exploit this vulnerability to execute arbitrary code on the RAS server machine.
Impact
- Denial of Service
- Code Execution
Indicators Of Compromise
CVE
- CVE-2023-21757
- CVE-2023-21555
- CVE-2023-21546
- CVE-2023-21679
- CVE-2023-21556
- CVE-2023-21543
Affected Vendors
Microsoft
Affected Products
- Microsoft Windows 7 SP1 x32
- Microsoft Windows 7 SP1 x64
- Microsoft Windows Server 2012
- Microsoft Windows 8.1 x32
- Microsoft Windows 8.1 x64
- Microsoft Windows Server 2012 R2
- Microsoft Windows RT 8.1Microsoft Windows 10 x32
- Microsoft Windows 10 x64
- Microsoft Windows Server 2016Microsoft Windows Server 2019
- Microsoft Windows 10 1809 for x64-based Systems
- Microsoft Windows 10 1809 for 32-bit Systems
- Microsoft Windows 10 1809 for ARM64-based Systems
- Microsoft Windows 10 1607 for 32-bit Systems
- Microsoft Windows 10 1607 for x64-based Systems
- Microsoft Windows 10 20H2 for 32-bit Systems
- Microsoft Windows 10 20H2 for ARM64-based Systems
- Microsoft Windows 10 20H2 for x64-based Systems
- Microsoft Windows Server (Server Core installation) 2019
- Microsoft Windows Server (Server Core installation) 2016
- Microsoft Windows Server (Server Core installation) 2012 R2
- Microsoft Windows Server (Server Core installation) 2012
- Microsoft Windows Server for X64-based systems 2008 R2 SP1
- Microsoft Windows Server for X64-based systems (Server Core installation) 2008 SP2
- Microsoft Windows Server for 32-bit systems (Server Core installation) 2008 SP2
- Microsoft Windows Server for 32-bit systems 2008 SP2Microsoft Windows Server 2022
- Microsoft Windows Server (Server Core installation) 2022
- Microsoft Windows Server for X64-based systems 2008 SP2
- Microsoft Windows 10 21H2 for 32-bit Systems
- Microsoft Windows 10 21H2 for ARM64-based Systems
- Microsoft Windows 10 21H2 for x64-based Systems
- Microsoft Windows Server 2022 Azure Edition Core Hotpatch
- Microsoft Windows 11 22H2 for ARM64-based Systems
- Microsoft Windows 11 22H2 for x64-based Systems
- Microsoft Windows 10 22H2 for 32-bit Systems
- Microsoft Windows 10 22H2 for ARM64-based Systems
- Microsoft Windows 10 22H2 for x64-based Systems
- Microsoft Windows 11 21H2 for ARM64-based Systems
- Microsoft Windows 11 21H2 for x64-based Systems
- Microsoft Windows Server for X64-based systems (Server Core installation) 2008 R2
Remediation
Use Microsoft Automatic Update to apply the appropriate patch for your system, or the Microsoft Security Update Guide to search for available patches.