github - ghsa-958f-78j2-fqr6

GHSA-958F-78J2-FQR6

Vulnerability from github – Published: 2022-05-24 17:01 – Updated: 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 (GCVE-0-2019-15803)

Vulnerability from cvelistv5 – Published: 2019-11-14 20:15 – Updated: 2024-08-05 00:56

Summary

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	https://jasper.la/exploring-zyxel-gs1900-firmware…	x_refsource_MISC
	https://www.zyxel.com/support/gs1900-switch-vulne…	x_refsource_CONFIRM

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          "dateUpdated": "2024-08-05T00:56:22.468Z",
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            "url": "https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html"
          },
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            "url": "https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
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        }
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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

GHSA-958F-78J2-FQR6

CVE-2019-15803 (GCVE-0-2019-15803)

Tags

Sightings

Nomenclature