Vulnerability-Lookup

VAR-202407-2513

Vulnerability from variot - Updated: 2025-11-18 14:43

An issue was discovered on Brother MFC-J491DW C1806180757 devices. The printer's web-interface password hash can be retrieved without authentication, because the response header of any failed login attempt returns an incomplete authorization cookie. The value of the authorization cookie is the MD5 hash of the password in hexadecimal. An attacker can easily derive the true MD5 hash from this, and use offline cracking attacks to obtain administrative access to the device.

[Vulnerability Type] Incorrect Access Control

[Vendor of Product] Brother

[Affected Product Code Base] MFC-J491DW - C1806180757

[Affected Component] Web admin panel

[Attack Type] Remote

[Impact Escalation of Privileges] true

[Impact Information Disclosure] true

[Attack Vectors] An attacker needs to have access to the web interface running on TCP/80 on the device.

[Has vendor confirmed or acknowledged the vulnerability?] true

[Discoverer] Konrad Leszcynski, intern at Qbit in cooperation with the Dutch Consumer Organisation

[Reference] https://global.brother

Use CVE-2019-20457

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CVE-2019-20457 (GCVE-0-2019-20457)

Vulnerability from cvelistv5 – Published: 2024-11-07 00:00 – Updated: 2025-11-04 17:11

Summary

Severity ?

9.1 (Critical)


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

CWE

Assigner

mitre

References

URL

Tags

	https://global.brother
	https://support.brother.com/g/s/security/en/index.html
	https://seclists.org/fulldisclosure/2024/Jul/14	mailing-list

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:h:brother:mfc-j491dw:-:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "mfc-j491dw",
            "vendor": "brother",
            "versions": [
              {
                "status": "affected",
                "version": "MFC-J491DW_C1806180757"
              }
            ]
          }
        ],
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2019-20457",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-11-08T16:37:04.565634Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
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                "cweId": "CWE-276",
                "description": "CWE-276 Incorrect Default Permissions",
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        "providerMetadata": {
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
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        "providerMetadata": {
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      },
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          "tags": [
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          "url": "https://seclists.org/fulldisclosure/2024/Jul/14"
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    "datePublished": "2024-11-07T00:00:00.000Z",
    "dateReserved": "2020-02-17T00:00:00.000Z",
    "dateUpdated": "2025-11-04T17:11:56.231Z",
    "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

VAR-202407-2513

CVE-2019-20457 (GCVE-0-2019-20457)

Tags

Sightings

Nomenclature