CVSS 3.1
5.3 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NCVE-2024-27305
Medium (5.3) in aio-libs aiosmtpd. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in aiosmtpd 1.4.5.
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.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 31% of CVEs (scores of 2026-10-31)
- CWE
- CWE-345
- Published
- Modified
- Record from
- the NVD, synced
Affected
- aio-libs:aiosmtpd
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-pr2m-px7j-xg65 | PyPI | aiosmtpd | <1.4.5 | 1.4.5 |
| PYSEC-2024-221 | PyPI | aiosmtpd | <1.4.5 | 1.4.5 |
References
- https://github.com/aio-libs/aiosmtpd/commit/24b6c79c8921cf1800e27ca144f4f37023982bbb
- https://github.com/aio-libs/aiosmtpd/security/advisories/GHSA-pr2m-px7j-xg65
- https://www.postfix.org/smtp-smuggling.html
- https://github.com/aio-libs/aiosmtpd/commit/24b6c79c8921cf1800e27ca144f4f37023982bbb
- https://github.com/aio-libs/aiosmtpd/security/advisories/GHSA-pr2m-px7j-xg65