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May 11, 2022
CVE-2022-26923 - Active Directory Domain Services Elevation of Privilege Vulnerability
THE THREAT Microsoft has disclosed a new vulnerability impacting Active Directory Certificate Services (ADCS) tracked as CVE-2022-26923 (Active Directory Domain Services Elevation of Privilege Vulnerability). If exploited successfully, an authenticated attacker can escalate privileges in environments where ADCS is running on the domain. eSentire is aware of technical details and tooling [2] for…
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Cybersecurity Leader eSentire Introduces e3 Partner Ecosystem Transforming How Value Is Delivered to Business Leaders
Waterloo, ON, May 10, 2022— eSentire, the Authority in Managed Detection and Response (MDR), today announced the launch of its e3 partner ecosystem, representing experience, expertise, eSentire. The e3 ecosystem focuses on mapping partner engagement, productivity and overall experience to how business leaders are choosing to consume best-in-class cybersecurity services. Believing that we all have…
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Security advisories — Feb 26, 2019

Mailsploit Email Spoofing

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A set of security bugs that allow spoofed emails to evade standard security measures have been identified. Security researchers dubbed the flaws ‘Mailsploit’. This form of attack allows malicious actors to insert a fake sender name into emails without detection by modern anti-spoofing tools. In selective instances, Mailsploit will also allow malicious code to be run on a victim’s device. There are currently 33 email clients vulnerable to this attack including Apple Mail, Outlook, and Mozilla Thunderbird; for a full list of vulnerable mail clients please see the link below [1]. At the time of publication, only eight client applications have released patches.

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Additional information

The Mailsploit security bugs allow attackers’ spoofed emails to bypass the anti-spoofing protocol DMARC. The attack is made possible due to improper sanitization of non-ASCII characters in the "From:" field. Some email applications when decoding Internet Message Headers only display strings up to the first null or newline character. This prevents the full email address from being displayed to the user. As such, attackers can insert a null character to obfuscate their real email.

For additional technical details see the link for the original vulnerability report below [2].

[1] https://docs.google.com/spreadsheets/d/1jkb_ZybbAoUA43K902lL-sB7c1HMQ78-fhQ8nowJCQk/htmlview?sle=true

[2] https://www.mailsploit.com/index

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