Splitting the email atom: exploiting parsers to bypass access controls
Summary
This article discusses how websites parse email addresses to extract domains and infer organizational affiliations. It highlights that discrepancies in how email address parsers function can lead to critical vulnerabilities, allowing for bypass of access controls.
IFF Assessment
The exploitation of email parser discrepancies to bypass access controls represents a new attack vector that defenders need to be aware of and mitigate.
Severity
This vulnerability can allow for unauthorized access to sensitive information or systems by exploiting how different parsers interpret email addresses, leading to a high impact on confidentiality and integrity.
Defender Context
Defenders should be aware of the potential for attacks that exploit inconsistencies in how email addresses are processed by different systems. Implementing robust validation and sanitization for all user-supplied email input is crucial.