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Advisories

aiosmtplib before 5.1.3 ESMTP Parameter Injection via unvalidated addresses

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severity
medium
date
Affecting

  • aiosmtplib >= 0, < 5.1.3

CWE
  • CWE-88 Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
CVSS
6.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
Credit
Alfie Goh Li Heng
Description
aiosmtplib before 5.1.3 fails to properly validate email addresses supplied by callers, allowing attackers to inject ESMTP parameters into MAIL FROM and RCPT TO command lines. Attackers can craft malicious addresses containing spaces and angle brackets to append parameters like AUTH, NOTIFY, or ORCPT to envelope commands, forging authenticated identities or forcing delivery notifications to third parties.

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