Is CVE-2019-15804 in the CISA KEV catalog?

No. CVE-2019-15804 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-15804?

CVE-2019-15804 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2019-15804?

CVE-2019-15804 has an EPSS score of 0.93% (56th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-15804?

Upgrade gs1900-10hp firmware to 2.50(aazi.0)c0 or later. Fixes are available for 9 affected products.

CVE & CISA-KEV Catalog

CVE-2019-15804

HIGH

7.5

CVSS v3

NVD

Description

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. By sending a signal to the CLI process, undocumented functionality is triggered. Specifically, a menu can be triggered by sending the SIGQUIT signal to the CLI application (e.g., through CTRL+\ via SSH). The access control check for this menu does work and prohibits accessing the menu, which contains "Password recovery for specific user" options. The menu is believed to be accessible using a serial console.

How to fix

Remediation Available

gs1900-10hp firmwareNVD

Affected:< 2.50(aazi.0)c0Fixed in:2.50(aazi.0)c0CVE-2019-15804derived from NVD

gs1900-16 firmwareNVD

Affected:< 2.50(aahj.0)c0Fixed in:2.50(aahj.0)c0CVE-2019-15804derived from NVD

gs1900-24 firmwareNVD

Affected:< 2.50(aahl.0)c0Fixed in:2.50(aahl.0)c0CVE-2019-15804derived from NVD

gs1900-24e firmwareNVD

Affected:< 2.50(aahk.0)c0Fixed in:2.50(aahk.0)c0CVE-2019-15804derived from NVD

gs1900-24hp firmwareNVD

Affected:< 2.50(aahm.0)c0Fixed in:2.50(aahm.0)c0CVE-2019-15804derived from NVD

gs1900-48 firmwareNVD

Affected:< 2.50(aahn.0)c0Fixed in:2.50(aahn.0)c0CVE-2019-15804derived from NVD

gs1900-48hp firmwareNVD

Affected:< 2.50(aaho.0)c0Fixed in:2.50(aaho.0)c0CVE-2019-15804derived from NVD

gs1900-8 firmwareNVD

Affected:< 2.50(aahh.0)c0Fixed in:2.50(aahh.0)c0CVE-2019-15804derived from NVD

gs1900-8hp firmwareNVD

Affected:< 2.50(aahi.0)c0Fixed in:2.50(aahi.0)c0CVE-2019-15804derived 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 RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.93%probability of exploitation in 30 days

56thpercentile

Moderate risk: more likely to be exploited than 56% of all known CVEs.

References

Exploit1

jasper.la

Vendor Advisory1

zyxel.com

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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.