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Jul 29, 2021
UPDATE: PetitPotam NTLM Relay Attack
THE THREAT PetitPotam is a variant of the NTLM Relay attack discovered by security researcher Gilles Lionel. It is tracked as an authentication bypass vulnerability in Active Directory (Certificate Services); currently no CVE identifier has been assigned to this vulnerability. Proof of Concept (PoC) code released last week [1] relies on the Encrypting File System Remote (EFSRPC) protocol to…
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Tecala and eSentire Partner to Protect Enterprises across APAC from Business-Disrupting Cyber Attacks
Sydney, 12 July, 2021 - Tecala, Australia’s award-winning technology services and IT consulting provider, today announced it has chosen eSentire, the global Authority in Managed Detection and Response (MDR) cybersecurity services, as their exclusive MDR solution provider in Australia and New Zealand. This partnership will enable Tecala to augment its cybersecurity practice and offer enterprises…
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Security advisories — Apr 13, 2021

Microsoft Exchange Vulnerabilities Announced 

2 min read

THE THREAT

On April 13th, Microsoft released its monthly bundle of security patches. Notably, this release includes four vulnerabilities impacting multiple versions of Microsoft on-premise Exchange Servers. All Exchange vulnerabilities received a rating of critical and could allow attackers to execute code on remote Exchange servers. Exploitation may allow persistent access and control of enterprise networks.

Exploitation in the wild has not been identified at this time. These vulnerabilities are considered “Exploitation More Likely” by Microsoft. The criticality of these vulnerabilities and the potential value of Exchange server exploits increases the likelihood of exploitation in the near future. Organizations are strongly recommended to apply the relevant security patches as soon as possible.

What we’re doing about it

What you should do about it

Additional information

All four of these vulnerabilities were discovered and reported to Microsoft by the National Security Agency (NSA). Two of the vulnerabilities (CVE-2021-28480, CVE-2021-28481) are remotely exploitable without authentication. Exploits for these vulnerabilities will be highly valuable to adversaries. Mitigating these vulnerabilities before exploits become available is critical.

Exchange Vulnerabilities:

Impacted Products:

References:

[1] https://msrc-blog.microsoft.com/2021/04/13/april-2021-update-tuesday-packages-now-available/

[2] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28480

[3] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28481

[4] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28482

[5] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-28483