CVE & CISA-KEV Catalog

CVE-2019-15799

HIGHEPSS 81th pctl
8.8
CVSS v3
NVD

Description

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.

CWE-269Improper Privilege Management

How to fix

Remediation Available
gs1900-10hp firmwareNVD
Affected:< 2.50(aazi.0)c0Fixed in:2.50(aazi.0)c0CVE-2019-15799derived from NVD
gs1900-16 firmwareNVD
Affected:< 2.50(aahj.0)c0Fixed in:2.50(aahj.0)c0CVE-2019-15799derived from NVD
gs1900-24 firmwareNVD
Affected:< 2.50(aahl.0)c0Fixed in:2.50(aahl.0)c0CVE-2019-15799derived from NVD
gs1900-24e firmwareNVD
Affected:< 2.50(aahk.0)c0Fixed in:2.50(aahk.0)c0CVE-2019-15799derived from NVD
gs1900-24hp firmwareNVD
Affected:< 2.50(aahm.0)c0Fixed in:2.50(aahm.0)c0CVE-2019-15799derived from NVD
gs1900-48 firmwareNVD
Affected:< 2.50(aahn.0)c0Fixed in:2.50(aahn.0)c0CVE-2019-15799derived from NVD
gs1900-48hp firmwareNVD
Affected:< 2.50(aaho.0)c0Fixed in:2.50(aaho.0)c0CVE-2019-15799derived from NVD
gs1900-8 firmwareNVD
Affected:< 2.50(aahh.0)c0Fixed in:2.50(aahh.0)c0CVE-2019-15799derived from NVD
gs1900-8hp firmwareNVD
Affected:< 2.50(aahi.0)c0Fixed in:2.50(aahi.0)c0CVE-2019-15799derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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

Exploit Intelligence

2.31%probability of exploitation in 30 days
81stpercentile

Elevated risk: more likely to be exploited than 81% of all known CVEs.

References

Vendor Advisory1

Related Vulnerabilities

Other CWE-269 (Improper Privilege Management) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2017-12635Critical9.8100%-Fix
CVE-2022-24637Critical9.899%-Fix
CVE-2017-5689Critical9.892%KEVFix
CVE-2020-3243Critical9.888%--
CVE-2024-21888High8.887%--
CVE-2022-0441Critical9.885%-Fix
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.