CISA orders federal agencies to patch CVE-2022-26925 by July 22

cisa Known Exploited Vulnerabilities RESURGE

US Critical Infrastructure Security Agency (CISA) adds CVE-2022-26925 Windows LSA flaw to its Known Exploited Vulnerabilities Catalog.

In May the US CISA removed the CVE-2022-26925 Windows LSA vulnerability from its Known Exploited Vulnerabilities Catalog due to Active Directory (AD) certificate authentication problems observed after the installation of Microsoft’s May 2022 Patch Tuesday security updates.

“CISA is temporarily removing CVE-2022-26925 from its Known Exploited Vulnerability Catalog due to a risk of authentication failures when the May 10, 2022 Microsoft rollup update is applied to domain controllers. After installing May 10, 2022 rollup update on domain controllers, organizations might experience authentication failures on the server or client for services, such as Network Policy Server (NPS), Routing and Remote access Service (RRAS), Radius, Extensible Authentication Protocol (EAP), and Protected Extensible Authentication Protocol (PEAP).” reads the advisory published by CISA. “Microsoft notified CISA of this issue, which is related to how the mapping of certificates to machine accounts is being handled by the domain controller.”

According to Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities, FCEB agencies have to address the identified vulnerabilities by the due date to protect their networks against attacks exploiting the flaws in the catalog.

Experts recommend also private organizations review the Catalog and address the vulnerabilities in their infrastructure.

The flaw is a Windows LSA Spoofing vulnerability actively exploited in the wild. The vulnerability can be exploited by an unauthenticated attacker to force a domain controller to authenticate against another server using NTLM.

“An unauthenticated attacker could call a method on the LSARPC interface and coerce the domain controller to authenticate to the attacker using NTLM. This security update detects anonymous connection attempts in LSARPC and disallows it.” read the advisory published by Microsoft.

Now the US organization added again the CVE-2022-26925 to the catalog and orders Federal agencies to fix the vulnerability by July 22.

The agency also released guidance on applying June Microsoft patch Tuesday update for CVE-2022-26925.

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Pierluigi Paganini

(SecurityAffairs – hacking, CVE-2022-26925)

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Pierluigi Paganini

Pierluigi Paganini is member of the ENISA (European Union Agency for Network and Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he is also a Security Evangelist, Security Analyst and Freelance Writer. Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security expert with over 20 years experience in the field, he is Certified Ethical Hacker at EC Council in London. The passion for writing and a strong belief that security is founded on sharing and awareness led Pierluigi to find the security blog "Security Affairs" recently named a Top National Security Resource for US. Pierluigi is a member of the "The Hacker News" team and he is a writer for some major publications in the field such as Cyber War Zone, ICTTF, Infosec Island, Infosec Institute, The Hacker News Magazine and for many other Security magazines. Author of the Books "The Deep Dark Web" and “Digital Virtual Currency and Bitcoin”.