Vulnerability-Lookup

CVE-2021-3639 (GCVE-0-2021-3639)

Vulnerability from cvelistv5 – Published: 2022-08-22 14:49 – Updated: 2024-08-03 17:01

Summary

A flaw was found in mod_auth_mellon where it does not sanitize logout URLs properly. This issue could be used by an attacker to facilitate phishing attacks by tricking users into visiting a trusted web application URL that redirects to an external and potentially malicious server. The highest threat from this liability is to confidentiality and integrity.

Severity

6.1 (Medium)


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

CWE

CWE-601 - - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

redhat

References

3 references

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1980648	x_refsource_MISC
https://access.redhat.com/security/cve/CVE-2021-3639	x_refsource_MISC
https://github.com/latchset/mod_auth_mellon/commi…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
n/a	mod_auth_mellon	Affected: Fixed in v0.18.0

Show details on NVD website

JSON

To clipboard

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WID-SEC-W-2023-1389

Vulnerability from csaf_certbund - Published: 2022-05-10 22:00 - Updated: 2023-06-08 22:00

Summary

Red Hat Enterprise Linux (mod_auth_mellon): Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen

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 entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

Betroffene Betriebssysteme: - UNIX - Linux

CVE-2021-3639

Es existiert eine Schwachstelle in Red Hat Enterprise Linux. Der Fehler besteht aufgrund einer unsachgemäßen Bereinigung von Logout-URLs in der Komponente mod_auth_mellon. Ein entfernter, anonymer Angreifer kann diese Schwachstelle ausnutzen, um Sicherheitsmaßnahmen zu umgehen. Zur erfolgreichen Ausnutzung ist eine Benutzeraktion erforderlich.

Affected products

Known affected 3 products

Product	Identifier	Version
Amazon Linux 2 Amazon	`cpe:/o:amazon:linux_2:-`	—
Oracle Linux Oracle	`cpe:/o:oracle:linux:-`	—
Red Hat Enterprise Linux 8 Red Hat	`cpe:/o:redhat:enterprise_linux:8`	—

References

7 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://alas.aws.amazon.com/ALAS-2023-1765.html	external
https://alas.aws.amazon.com/AL2/ALAS-2023-2077.html	external
https://access.redhat.com/errata/RHSA-2022:4690	external
https://linux.oracle.com/errata/ELSA-2022-1934.html	external
https://access.redhat.com/errata/RHSA-2022:1934	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 entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux ausnutzen, um Sicherheitsvorkehrungen zu umgehen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- UNIX\n- Linux",
        "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-2023-1389 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2022/wid-sec-w-2023-1389.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2023-1389 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-1389"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS-2023-1765 vom 2023-06-09",
        "url": "https://alas.aws.amazon.com/ALAS-2023-1765.html"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS2-2023-2077 vom 2023-06-08",
        "url": "https://alas.aws.amazon.com/AL2/ALAS-2023-2077.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2022:4690 vom 2022-05-19",
        "url": "https://access.redhat.com/errata/RHSA-2022:4690"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2022-1934 vom 2022-05-17",
        "url": "https://linux.oracle.com/errata/ELSA-2022-1934.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory vom 2022-05-10",
        "url": "https://access.redhat.com/errata/RHSA-2022:1934"
      }
    ],
    "source_lang": "en-US",
    "title": "Red Hat Enterprise Linux (mod_auth_mellon): Schwachstelle erm\u00f6glicht Umgehen von Sicherheitsvorkehrungen",
    "tracking": {
      "current_release_date": "2023-06-08T22:00:00.000+00:00",
      "generator": {
        "date": "2024-08-15T17:52:02.120+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.3.5"
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      },
      "id": "WID-SEC-W-2023-1389",
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      "revision_history": [
        {
          "date": "2022-05-10T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2022-05-17T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Oracle Linux aufgenommen"
        },
        {
          "date": "2022-05-18T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2023-06-08T22:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von Amazon aufgenommen"
        }
      ],
      "status": "final",
      "version": "4"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Amazon Linux 2",
            "product": {
              "name": "Amazon Linux 2",
              "product_id": "398363",
              "product_identification_helper": {
                "cpe": "cpe:/o:amazon:linux_2:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Amazon"
      },
      {
        "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": "Red Hat Enterprise Linux 8",
            "product": {
              "name": "Red Hat Enterprise Linux 8",
              "product_id": "T014111",
              "product_identification_helper": {
                "cpe": "cpe:/o:redhat:enterprise_linux:8"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-3639",
      "notes": [
        {
          "category": "description",
          "text": "Es existiert eine Schwachstelle in Red Hat Enterprise Linux. Der Fehler besteht aufgrund einer unsachgem\u00e4\u00dfen Bereinigung von Logout-URLs in der Komponente mod_auth_mellon. Ein entfernter, anonymer Angreifer kann diese Schwachstelle ausnutzen, um Sicherheitsma\u00dfnahmen zu umgehen. Zur erfolgreichen Ausnutzung ist eine Benutzeraktion erforderlich."
        }
      ],
      "product_status": {
        "known_affected": [
          "398363",
          "T004914",
          "T014111"
        ]
      },
      "release_date": "2022-05-10T22:00:00.000+00:00",
      "title": "CVE-2021-3639"
    }
  ]
}

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.

Action not permitted

CVE-2021-3639 (GCVE-0-2021-3639)

WID-SEC-W-2023-1389

Tags

Sightings

Nomenclature