CVE-2024-27305 SMTP smuggling in aiosmtpd

2024-03-1220:29:54

CWE-345

GitHub_M

github.com

aiosmtpd

smtp smuggling

vulnerability

cve-2024-27305

python

asyncio

postfix

phishing

upgrade

e-mail spoofing

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

SSVC

Exploitation

none

Automatable

yes

Technical Impact

partial

JSON

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.

ADP Affected

[
  {
    "cpes": [
      "cpe:2.3:a:aio-libs:aiosmtpd:*:*:*:*:*:*:*:*"
    ],
    "vendor": "aio-libs",
    "product": "aiosmtpd",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "1.4.5",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unknown"
  }
]