Vulnerability-Lookup

WID-SEC-W-2026-0195

Vulnerability from csaf_certbund - Published: 2026-01-21 23:00 - Updated: 2026-03-03 23:00

Summary

Red Hat Enterprise Linux (pcs / tornado): Mehrere Schwachstellen ermöglichen Denial of Service

Severity

Mittel

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution.

Angriff: Ein Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux in pcs bezüglich der tornado Komponente ausnutzen, um einen Denial of Service Angriff durchzuführen.

Betroffene Betriebssysteme: - Linux - UNIX

CVE-2025-67725

CVE-2025-67726

References

URL

Category

	https://wid.cert-bund.de/.well-known/csaf/white/2…	self
	https://wid.cert-bund.de/portal/wid/securityadvis…	self
	https://access.redhat.com/errata/RHSA-2026:0930	external
	https://access.redhat.com/security/cve/cve-2025-67725	external
	https://access.redhat.com/security/cve/cve-2025-67726	external
	https://linux.oracle.com/errata/ELSA-2026-0930.html	external
	https://lists.suse.com/pipermail/sle-security-upd…	external
	https://errata.build.resf.org/RLSA-2026:0930	external
	https://lists.debian.org/debian-lts-announce/2026…	external
	https://access.redhat.com/errata/RHSA-2026:2106	external
	https://access.redhat.com/errata/RHSA-2026:2469	external
	https://access.redhat.com/errata/RHSA-2026:2484	external
	https://access.redhat.com/errata/RHSA-2026:2462	external
	https://access.redhat.com/errata/RHSA-2026:2465	external
	https://access.redhat.com/errata/RHSA-2026:3713	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Red Hat Enterprise Linux (RHEL) ist eine popul\u00e4re Linux-Distribution.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux in pcs bez\u00fcglich der tornado Komponente ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- UNIX",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-0195 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0195.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-0195 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0195"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory vom 2026-01-21",
        "url": "https://access.redhat.com/errata/RHSA-2026:0930"
      },
      {
        "category": "external",
        "summary": "RedHat Customer Portal vom 2026-01-21",
        "url": "https://access.redhat.com/security/cve/cve-2025-67725"
      },
      {
        "category": "external",
        "summary": "RedHat Customer Portal vom 2026-01-21",
        "url": "https://access.redhat.com/security/cve/cve-2025-67726"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2026-0930 vom 2026-01-22",
        "url": "https://linux.oracle.com/errata/ELSA-2026-0930.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:0222-1 vom 2026-01-22",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-January/023863.html"
      },
      {
        "category": "external",
        "summary": "Rocky Linux Security Advisory RLSA-2026:0930 vom 2026-01-23",
        "url": "https://errata.build.resf.org/RLSA-2026:0930"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DLA-4461 vom 2026-02-01",
        "url": "https://lists.debian.org/debian-lts-announce/2026/02/msg00000.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:2106 vom 2026-02-05",
        "url": "https://access.redhat.com/errata/RHSA-2026:2106"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:2469 vom 2026-02-10",
        "url": "https://access.redhat.com/errata/RHSA-2026:2469"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:2484 vom 2026-02-10",
        "url": "https://access.redhat.com/errata/RHSA-2026:2484"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:2462 vom 2026-02-10",
        "url": "https://access.redhat.com/errata/RHSA-2026:2462"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:2465 vom 2026-02-10",
        "url": "https://access.redhat.com/errata/RHSA-2026:2465"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:3713 vom 2026-03-04",
        "url": "https://access.redhat.com/errata/RHSA-2026:3713"
      }
    ],
    "source_lang": "en-US",
    "title": "Red Hat Enterprise Linux (pcs / tornado): Mehrere Schwachstellen erm\u00f6glichen Denial of Service",
    "tracking": {
      "current_release_date": "2026-03-03T23:00:00.000+00:00",
      "generator": {
        "date": "2026-03-04T11:18:41.228+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.5.0"
        }
      },
      "id": "WID-SEC-W-2026-0195",
      "initial_release_date": "2026-01-21T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-01-21T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-01-22T23:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2026-02-01T23:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Debian aufgenommen"
        },
        {
          "date": "2026-02-05T23:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2026-02-10T23:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2026-03-03T23:00:00.000+00:00",
          "number": "6",
          "summary": "Neue Updates von Red Hat aufgenommen"
        }
      ],
      "status": "final",
      "version": "6"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Debian Linux",
            "product": {
              "name": "Debian Linux",
              "product_id": "2951",
              "product_identification_helper": {
                "cpe": "cpe:/o:debian:debian_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Debian"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Oracle Linux",
            "product": {
              "name": "Oracle Linux",
              "product_id": "T004914",
              "product_identification_helper": {
                "cpe": "cpe:/o:oracle:linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Oracle"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "RESF Rocky Linux",
            "product": {
              "name": "RESF Rocky Linux",
              "product_id": "T032255",
              "product_identification_helper": {
                "cpe": "cpe:/o:resf:rocky_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "RESF"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Enterprise Linux",
                "product": {
                  "name": "Red Hat Enterprise Linux",
                  "product_id": "67646",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:enterprise_linux:-"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "8",
                "product": {
                  "name": "Red Hat Enterprise Linux 8",
                  "product_id": "T050264",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:enterprise_linux:8"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Enterprise Linux"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "SUSE Linux",
            "product": {
              "name": "SUSE Linux",
              "product_id": "T002207",
              "product_identification_helper": {
                "cpe": "cpe:/o:suse:suse_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-67725",
      "product_status": {
        "known_affected": [
          "2951",
          "T002207",
          "67646",
          "T004914",
          "T050264",
          "T032255"
        ]
      },
      "release_date": "2026-01-21T23:00:00.000+00:00",
      "title": "CVE-2025-67725"
    },
    {
      "cve": "CVE-2025-67726",
      "product_status": {
        "known_affected": [
          "2951",
          "T002207",
          "67646",
          "T004914",
          "T050264",
          "T032255"
        ]
      },
      "release_date": "2026-01-21T23:00:00.000+00:00",
      "title": "CVE-2025-67726"
    }
  ]
}

CVE-2025-67725 (GCVE-0-2025-67725)

Vulnerability from cvelistv5 – Published: 2025-12-12 05:49 – Updated: 2025-12-18 18:51

Title

Tornado is Vulnerable to Quadratic DoS via Repeated Header Coalescing

Summary

Tornado is a Python web framework and asynchronous networking library. In versions 6.5.2 and below, a single maliciously crafted HTTP request can block the server's event loop for an extended period, caused by the HTTPHeaders.add method. The function accumulates values using string concatenation when the same header name is repeated, causing a Denial of Service (DoS). Due to Python string immutability, each concatenation copies the entire string, resulting in O(n²) time complexity. The severity can vary from high if max_header_size has been increased from its default, to low if it has its default value of 64KB. This issue is fixed in version 6.5.3.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M

References

URL

CVE-2025-67726 (GCVE-0-2025-67726)

Vulnerability from cvelistv5 – Published: 2025-12-12 06:13 – Updated: 2025-12-18 18:48

Title

Tornado is Vulnerable to Quadratic DoS via Crafted Multipart Parameters

Summary

Tornado is a Python web framework and asynchronous networking library. Versions 6.5.2 and below use an inefficient algorithm when parsing parameters for HTTP header values, potentially causing a DoS. The _parseparam function in httputil.py is used to parse specific HTTP header values, such as those in multipart/form-data and repeatedly calls string.count() within a nested loop while processing quoted semicolons. If an attacker sends a request with a large number of maliciously crafted parameters in a Content-Disposition header, the server's CPU usage increases quadratically (O(n²)) during parsing. Due to Tornado's single event loop architecture, a single malicious request can cause the entire server to become unresponsive for an extended period. This issue is fixed in version 6.5.3.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-834 - Excessive Iteration
CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M

References

URL

Tags

	https://github.com/tornadoweb/tornado/security/ad…	x_refsource_CONFIRM
	https://github.com/tornadoweb/tornado/commit/7714…	x_refsource_MISC
	https://github.com/tornadoweb/tornado/releases/ta…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	tornadoweb	tornado	Affected: < 6.5.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-67726",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-18T18:47:53.473225Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-18T18:48:49.007Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "tornado",
          "vendor": "tornadoweb",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.5.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Tornado is a Python web framework and asynchronous networking library. Versions 6.5.2 and below use an inefficient algorithm when parsing parameters for HTTP header values, potentially causing a DoS. The _parseparam function in httputil.py is used to parse specific HTTP header values, such as those in multipart/form-data and repeatedly calls string.count() within a nested loop while processing quoted semicolons. If an attacker sends a request with a large number of maliciously crafted parameters in a Content-Disposition header, the server\u0027s CPU usage increases quadratically (O(n\u00b2)) during parsing. Due to Tornado\u0027s single event loop architecture, a single malicious request can cause the entire server to become unresponsive for an extended period. This issue is fixed in version 6.5.3."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-834",
              "description": "CWE-834: Excessive Iteration",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-400",
              "description": "CWE-400: Uncontrolled Resource Consumption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-12T06:13:51.336Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/tornadoweb/tornado/security/advisories/GHSA-jhmp-mqwm-3gq8",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/tornadoweb/tornado/security/advisories/GHSA-jhmp-mqwm-3gq8"
        },
        {
          "name": "https://github.com/tornadoweb/tornado/commit/771472cfdaeebc0d89a9cc46e249f8891a6b29cd",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/tornadoweb/tornado/commit/771472cfdaeebc0d89a9cc46e249f8891a6b29cd"
        },
        {
          "name": "https://github.com/tornadoweb/tornado/releases/tag/v6.5.3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/tornadoweb/tornado/releases/tag/v6.5.3"
        }
      ],
      "source": {
        "advisory": "GHSA-jhmp-mqwm-3gq8",
        "discovery": "UNKNOWN"
      },
      "title": "Tornado is Vulnerable to Quadratic DoS via Crafted Multipart Parameters"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-67726",
    "datePublished": "2025-12-12T06:13:51.336Z",
    "dateReserved": "2025-12-10T19:25:20.819Z",
    "dateUpdated": "2025-12-18T18:48:49.007Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

WID-SEC-W-2026-0195

CVE-2025-67725 (GCVE-0-2025-67725)

CVE-2025-67726 (GCVE-0-2025-67726)

Tags

Sightings

Nomenclature