// For flags

CVE-2024-27305

SMTP smuggling in aiosmtpd

Severity Score

5.3
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

aiosmtpd is a reimplementation of the Python stdlib smtpd.py based on asyncio. aiosmtpd is vulnerable to inbound SMTP smuggling. SMTP smuggling is a novel vulnerability based on not so novel interpretation differences of the SMTP protocol. By exploiting SMTP smuggling, an attacker may send smuggle/spoof e-mails with fake sender addresses, allowing advanced phishing attacks. This issue is also existed in other SMTP software like Postfix. With the right SMTP server constellation, an attacker can send spoofed e-mails to inbound/receiving aiosmtpd instances. This issue has been addressed in version 1.4.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.

aiosmtpd es una reimplementación de Python stdlib smtpd.py basada en asyncio. aiosmtpd es vulnerable al contrabando SMTP entrante. El contrabando SMTP es una vulnerabilidad novedosa basada en diferencias de interpretación no tan novedosas del protocolo SMTP. Al explotar el contrabando SMTP, un atacante puede enviar correos electrónicos de contrabando/falsificación con direcciones de remitente falsas, lo que permite ataques de phishing avanzados. Este problema también existe en otro software SMTP como Postfix. Con la constelación de servidores SMTP adecuada, un atacante puede enviar correos electrónicos falsificados a instancias entrantes/receptoras de aiosmtpd. Este problema se solucionó en la versión 1.4.5. Se recomienda a los usuarios que actualicen. No se conocen workarounds para esta vulnerabilidad.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-02-22 CVE Reserved
  • 2024-03-12 CVE Published
  • 2024-03-13 EPSS Updated
  • 2024-08-02 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-345: Insufficient Verification of Data Authenticity
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Aio-libs
Search vendor "Aio-libs"
Aiosmtpd
Search vendor "Aio-libs" for product "Aiosmtpd"
< 1.4.5
Search vendor "Aio-libs" for product "Aiosmtpd" and version " < 1.4.5"
en
Affected