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Rapid 7 - Patch Tuesday - October 2022
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The October batch of CVEs published by Microsoft includes 96 vulnerabilities, including 12 fixed earlier this month that affect the Chromium project used by their Edge browser.
Top of mind for many this month is whether Microsoft would patch the two Exchange Server zero-day vulnerabilities (CVE-2022-41040 and CVE-2022-41082) disclosed at the end of September. While Microsoft was relatively quick to acknowledge the vulnerabilities and provide mitigation steps, their guidance has continually changed as the recommended rules to block attack traffic get bypassed. This whack-a-mole approach seems likely to continue until a proper patch addressing the root causes is available; unfortunately, it doesn’t look like that will be happening today. Thankfully, the impact should be more limited than 2021’s ProxyShell and ProxyLogon vulnerabilities due to attackers needing to be authenticated to the server for successful exploitation. Reports are also surfacing about an additional zero-day distinct from these being used in ransomware attacks; however, these have not yet been substantiated.
Microsoft did address two other zero-day vulnerabilities with today’s patches. CVE-2022-41033, an Elevation of Privilege vulnerability affecting the COM+ Event System Service in all supported versions of Windows, has been seen exploited in the wild. CVE-2022-41043 is an Information Disclosure vulnerability affecting Office for Mac that was publicly disclosed but not (yet) seen exploited in the wild.
Nine CVEs categorized as Remote Code Execution (RCE) with Critical severity were also patched today – seven of them affect the Point-to-Point Tunneling Protocol, and like those fixed last month, require an attacker to win a race condition to exploit them. CVE-2022-38048 affects all supported versions of Office, and CVE-2022-41038 could allow an attacker authenticated to SharePoint to execute arbitrary code on the server, provided the account has “Manage List” permissions.
Maxing out the CVSS base score with a 10.0 this month is CVE-2022-37968, an Elevation of Privilege vulnerability in the Azure Arc-enabled Kubernetes cluster Connect component. It’s unclear why Microsoft has assigned such a high score, given that an attacker would need to know the randomly generated external DNS endpoint for an Azure Arc-enabled Kubernetes cluster (arguably making the Attack Complexity “High”). That said, if this condition is met then an unauthenticated user could become a cluster admin and potentially gain control over the Kubernetes cluster. Users of Azure Arc and Azure Stack Edge should check whether auto-updates are turned on, and if not, upgrade manually as soon as possible.
Original release date: December 18, 2018 Summary Quasar, a legitimate open-source remote administration tool (RAT), has been observed being used maliciously by Advanced Persistent Threat (APT) actors to facilitate network exploitation. This Analysis Report provides information on Quasar’s functions and features, along with recommendations for preventing and mitigating Quasar activity. Description Quasar is a publically available, open-source RAT for Microsoft Windows operating systems (OSs) written in the C# programming language. Quasar is authored by GitHub user MaxXor and publicly hosted as a GitHub repository. While the tool can be used for legitimate purposes (e.g., an organization’s helpdesk technician remotely accessing an employee’s laptop), the Cybersecurity and Infrastructure Security Agency (CISA), is aware of APT actors using Quasar for cybercrime and cyber-espionage campaigns. Quasar was first released in July 2014 as “xRAT 2.0.” In August 2015, xRAT was renamed “Quas...
Eric Howes , KnowBe4 Principal Lab Researcher, found out about another insidious bad guy trick: " If you work in IT there has undoubtedly come a dark moment when you wondered to yourself just who among your employee users would be gullible enough to click through a phishing email and potentially bring down your organization. from KnowBe4 Security Awareness Training Blog https://blog.knowbe4.com/when-users-add-their-names-to-a-wall-of-shame
An offensive security perspective on Microsoft Edge WebView2 Runtime, including architectural weaknesses, existing vulnerabilities, and exploitation methods. The post Signed, Trusted, and Abused: Proxy Execution via WebView2 appeared first on Black Hills Information Security, Inc. . from Black Hills Information Security, Inc. https://www.blackhillsinfosec.com/proxy-execution-via-webview2/
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