PYSEC-2026-1878

Vulnerability from pysec - Published: 2026-07-07 11:45 - Updated: 2026-07-07 17:25
VLAI
Details

An issue was discovered in OFPQueueGetConfigReply in parser.py in FaucetSDN Ryu version 4.34, allows remote attackers to cause a denial of service (DoS) (infinite loop).

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Impacted products
Name purl
ryu pkg:pypi/ryu
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "ryu",
        "purl": "pkg:pypi/ryu"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "4.34"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.2",
        "1.0",
        "1.1",
        "1.2",
        "1.3",
        "1.4",
        "1.5",
        "1.6",
        "1.7",
        "1.8",
        "1.9",
        "2.0",
        "2.1",
        "2.2",
        "3.1",
        "3.10",
        "3.11",
        "3.12",
        "3.13",
        "3.15",
        "3.17",
        "3.18",
        "3.19",
        "3.2",
        "3.20",
        "3.20.1",
        "3.20.2",
        "3.22",
        "3.23",
        "3.23.1",
        "3.23.2",
        "3.24",
        "3.25",
        "3.25.1",
        "3.26",
        "3.29",
        "3.29.1",
        "3.3",
        "3.30",
        "3.4",
        "3.5",
        "3.6",
        "3.7",
        "3.8",
        "3.9",
        "4.0",
        "4.1",
        "4.10",
        "4.11",
        "4.12",
        "4.13",
        "4.14",
        "4.15",
        "4.16",
        "4.17",
        "4.18",
        "4.19",
        "4.2",
        "4.2.1",
        "4.2.2",
        "4.20",
        "4.21",
        "4.22",
        "4.23",
        "4.24",
        "4.25",
        "4.26",
        "4.27",
        "4.29",
        "4.3",
        "4.30",
        "4.31",
        "4.32",
        "4.33",
        "4.34",
        "4.4",
        "4.5",
        "4.6",
        "4.7",
        "4.8",
        "4.8.1",
        "4.9"
      ]
    }
  ],
  "aliases": [
    "CVE-2020-35141",
    "GHSA-5x64-925v-h4gv"
  ],
  "details": "An issue was discovered in `OFPQueueGetConfigReply` in `parser.py` in FaucetSDN Ryu version 4.34, allows remote attackers to cause a denial of service (DoS) (infinite loop).",
  "id": "PYSEC-2026-1878",
  "modified": "2026-07-07T17:25:18.743261Z",
  "published": "2026-07-07T11:45:22.555852Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-35141"
    },
    {
      "type": "WEB",
      "url": "https://github.com/faucetsdn/ryu/issues/118"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/faucetsdn/ryu"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/ryu"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-5x64-925v-h4gv"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "FaucetSDN Ryu Denial of Service Vulnerability"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • 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.