CVE-2019-15804
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.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:NConfidentialityNone
I:HIntegrityHigh
A:NAvailabilityNone
Weaknesses
Affected Products
Zyxel Communications Corp.
commercial·TWaka zyxel
and 11 more affected products View all →
Exploitability
Official Patch Available
References
https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html
jasper.la
https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml
zyxel.com
https://nvd.nist.gov/vuln/detail/CVE-2019-15804
nvd.nist.gov
and 1 more references View all →
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