CVE-2019-15799 (GCVE-0-2019-15799)

Vulnerability from cvelistv5 – Published: 2019-11-14 20:16 – Updated: 2024-08-05 00:56
VLAI?
Summary
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. User accounts created through the web interface of the device, when given non-admin level privileges, have the same level of privileged access as administrators when connecting to the device via SSH (while their permissions via the web interface are in fact restricted). This allows normal users to obtain the administrative password by running the tech-support command via the CLI: this contains the encrypted passwords for all users on the device. As these passwords are encrypted using well-known and static parameters, they can be decrypted and the original passwords (including the administrator password) can be obtained.
Severity ?
No CVSS data available.
CWE
  • n/a
Assigner
References
Show details on NVD website
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"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:zyxel:gs1900-48:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"CFB7D4BF-7D17-48D3-990D-4BADAC8BD868\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:zyxel:gs1900-48hp_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"2.50\\\\(aaho.0\\\\)c0\",\"matchCriteriaId\":\"C6EA6D9E-B5D4-4043-90C5-409B5875A3B5\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:zyxel:gs1900-48hp:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"566A9E8C-AF55-4331-B9B0-F65EB900B0BE\"}]}]}],\"references\":[{\"url\":\"https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://vimeo.com/354726424\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml\",\"source\":\"cve@mitre.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://vimeo.com/354726424\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}"
  }
}


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Taxonomy of the tags.




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.