github - ghsa-958f-78j2-fqr6

ghsa-958f-78j2-fqr6

Vulnerability from github

Published

2022-05-24 17:01

Modified

2022-05-24 17:01

Details

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Through an undocumented sequence of keypresses, undocumented functionality is triggered. A diagnostics shell is triggered via CTRL-ALT-t, which prompts for the password returned by fds_sys_passDebugPasswd_ret(). The firmware contains access control checks that determine if remote users are allowed to access this functionality. The function that performs this check (fds_sys_remoteDebugEnable_ret in libfds.so) always return TRUE with no actual checks performed. The diagnostics menu allows for reading/writing arbitrary registers and various other configuration parameters which are believed to be related to the network interface chips.

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{
  "affected": [],
  "aliases": [
    "CVE-2019-15803"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-11-14T21:15:00Z",
    "severity": "MODERATE"
  },
  "details": "An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Through an undocumented sequence of keypresses, undocumented functionality is triggered. A diagnostics shell is triggered via CTRL-ALT-t, which prompts for the password returned by fds_sys_passDebugPasswd_ret(). The firmware contains access control checks that determine if remote users are allowed to access this functionality. The function that performs this check (fds_sys_remoteDebugEnable_ret in libfds.so) always return TRUE with no actual checks performed. The diagnostics menu allows for reading/writing arbitrary registers and various other configuration parameters which are believed to be related to the network interface chips.",
  "id": "GHSA-958f-78j2-fqr6",
  "modified": "2022-05-24T17:01:17Z",
  "published": "2022-05-24T17:01:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-15803"
    },
    {
      "type": "WEB",
      "url": "https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html"
    },
    {
      "type": "WEB",
      "url": "https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

cve-2019-15803

Vulnerability from cvelistv5

Published

2019-11-14 20:15

Modified

2024-08-05 00:56

Severity ?

Summary

References

▼	URL	Tags
	https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html	x_refsource_MISC
	https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml	x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

To clipboard

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  "containers": {
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      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T00:56:22.468Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
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          "lang": "en",
          "value": "An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Through an undocumented sequence of keypresses, undocumented functionality is triggered. A diagnostics shell is triggered via CTRL-ALT-t, which prompts for the password returned by fds_sys_passDebugPasswd_ret(). The firmware contains access control checks that determine if remote users are allowed to access this functionality. The function that performs this check (fds_sys_remoteDebugEnable_ret in libfds.so) always return TRUE with no actual checks performed. The diagnostics menu allows for reading/writing arbitrary registers and various other configuration parameters which are believed to be related to the network interface chips."
        }
      ],
      "problemTypes": [
        {
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              "type": "text"
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      "providerMetadata": {
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          "url": "https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2019-15803",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
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                      "version": {
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                            "version_value": "n/a"
                          }
                        ]
                      }
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                },
                "vendor_name": "n/a"
              }
            ]
          }
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              "url": "https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml"
            }
          ]
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      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
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    "datePublished": "2019-11-14T20:15:56",
    "dateReserved": "2019-08-29T00:00:00",
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  },
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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