GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

GHSA-3F84-RPWH-47G6

Vulnerability from github – Published: 2024-10-29 14:33 – Updated: 2025-01-21 17:53
VLAI
Summary
Waitress vulnerable to DoS leading to high CPU usage/resource exhaustion
Details

Impact

When a remote client closes the connection before waitress has had the opportunity to call getpeername() waitress won't correctly clean up the connection leading to the main thread attempting to write to a socket that no longer exists, but not removing it from the list of sockets to attempt to process. This leads to a busy-loop calling the write function.

A remote attacker could run waitress out of available sockets with very little resources required.

Patches

Waitress 3.0.1 contains fixes that remove the race condition.

Workarounds

No work-around.

References

  • https://github.com/Pylons/waitress/issues/418
  • https://github.com/Pylons/waitress/pull/435
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "waitress"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-49769"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-772"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-10-29T14:33:00Z",
    "nvd_published_at": "2024-10-29T15:15:12Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nWhen a remote client closes the connection before waitress has had the opportunity to call `getpeername()` waitress won\u0027t correctly clean up the connection leading to the main thread attempting to write to a socket that no longer exists, but not removing it from the list of sockets to attempt to process. This leads to a busy-loop calling the write function.\n\nA remote attacker could run waitress out of available sockets with very little resources required.\n\n### Patches\n\nWaitress 3.0.1 contains fixes that remove the race condition.\n\n### Workarounds\n\nNo work-around.\n\n### References\n\n- https://github.com/Pylons/waitress/issues/418\n- https://github.com/Pylons/waitress/pull/435\n",
  "id": "GHSA-3f84-rpwh-47g6",
  "modified": "2025-01-21T17:53:27Z",
  "published": "2024-10-29T14:33:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Pylons/waitress/security/advisories/GHSA-3f84-rpwh-47g6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-49769"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Pylons/waitress/issues/418"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Pylons/waitress/pull/435"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Pylons/waitress/commit/1ae4e894c9f76543bee06584001583fc6fa8c95c"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Pylons/waitress"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/waitress/PYSEC-2024-211.yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/11/msg00012.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Waitress vulnerable to DoS leading to high CPU usage/resource exhaustion"
}



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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.