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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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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 — Feb 26, 2019

Mailsploit Email Spoofing

1 min read

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