PYSEC-2024-221

Vulnerability from pysec - Published: 2024-03-12 21:15 - Updated: 2025-01-22 16:23
VLAI?
Details

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 ?
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Impacted products
Name purl
aiosmtpd pkg:pypi/aiosmtpd
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "aiosmtpd",
        "purl": "pkg:pypi/aiosmtpd"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "24b6c79c8921cf1800e27ca144f4f37023982bbb"
            },
            {
              "fixed": "24b6c79c8921cf1800e27ca144f4f37023982bbb"
            }
          ],
          "repo": "https://github.com/aio-libs/aiosmtpd",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0",
        "1.0a1",
        "1.0a2",
        "1.0a3",
        "1.0a4",
        "1.0a5",
        "1.0b1",
        "1.0rc1",
        "1.1",
        "1.2",
        "1.2.2",
        "1.2.4",
        "1.3.0",
        "1.3.1",
        "1.3.2",
        "1.4.0",
        "1.4.1",
        "1.4.2",
        "1.4.3",
        "1.4.3rc1",
        "1.4.3rc2",
        "1.4.4",
        "1.4.4.post1",
        "1.4.4.post2"
      ]
    }
  ],
  "aliases": [
    "CVE-2024-27305"
  ],
  "details": "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.",
  "id": "PYSEC-2024-221",
  "modified": "2025-01-22T16:23:18.042465+00:00",
  "published": "2024-03-12T21:15:58+00:00",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/aio-libs/aiosmtpd/security/advisories/GHSA-pr2m-px7j-xg65"
    },
    {
      "type": "FIX",
      "url": "https://github.com/aio-libs/aiosmtpd/commit/24b6c79c8921cf1800e27ca144f4f37023982bbb"
    },
    {
      "type": "WEB",
      "url": "https://www.postfix.org/smtp-smuggling.html"
    }
  ],
  "related": [
    "GHSA-pr2m-px7j-xg65",
    "GHSA-pr2m-px7j-xg65"
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.