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CVE-2024-27305— SMTP smuggling in aiosmtpd

Quick assessment

Affected
aio-libs aiosmtpd
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

aiosmtpd是基于 asyncio 的 SMTP 服务器。 aiosmtpd存在数据伪造问题漏洞，该漏洞源于存在SMTP走私漏洞。

CVSS 5.3 · Medium EPSS 0.37% · P31
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I. Basic Information for CVE-2024-27305

Vulnerability Information
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Vulnerability Title
SMTP smuggling in aiosmtpd
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5
Vulnerability Title
aiosmtpd 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
aiosmtpd是基于 asyncio 的 SMTP 服务器。 aiosmtpd存在数据伪造问题漏洞，该漏洞源于存在SMTP走私漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
aio-libs aiosmtpd < 1.4.5 -

II. Public POCs for CVE-2024-27305

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III. Intelligence Information for CVE-2024-27305

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Patches & Fixes for CVE-2024-27305 (1)

Vendor Advisories for CVE-2024-27305 (1)

Other References for CVE-2024-27305 (1)

IV. Related Vulnerabilities

Same product: aiosmtpd
Same vendor: aio-libs
Same weakness: CWE-345