CVE-2019-15799

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50AAHH.0C0. 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...

CVE-2019-15800

CVE-2019-15800 affects Zyxel GS1900 switches with firmware before 2.50(AAHH.0)C0. The root cause is lack of input validation in libclicmd.so under the commands cmd_sys_traceroute_exec(), cmd_sys_arp_clear(), and cmd_sys_ping_exec(). This could allow an attacker to trigger system() and execute arb...

CVE-2019-15800

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50AAHH.0C0. Due to lack of input validation in the cmdsystracerouteexec, cmdsysarpclear, and cmdsyspingexec functions in the libclicmd.so library contained in the firmware, an attacker could leverage these functions to call...

CVE-2019-15801

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50AAHH.0C0. The firmware image contains encrypted passwords that are used to authenticate users wishing to access a diagnostics or password-recovery menu. Using the hardcoded cryptographic key found elsewhere in the firmware,...

CVE-2019-15801

CVE-2019-15801 affects Zyxel GS1900 devices with firmware prior to 2.50(AAHH.0)C0. The firmware stores encrypted passwords used for diagnostics/password-recovery authentication. An attacker can decrypt these passwords using the hardcoded cryptographic key found elsewhere in the firmware, via the ...

CVE-2019-15802

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50AAHH.0C0. The firmware hashes and encrypts passwords using a hardcoded cryptographic key in salutilstrencrypt in libsal.so.0.0. The parameters salt, IV, and key data are used to encrypt and decrypt all passwords using AES256...

CVE-2019-15802

Affected product: Zyxel GS1900 switches. Vulnerability: firmware before 2.50(AAHH.0)C0 uses a hardcoded cryptographic key in libsal.so.0.0 to encrypt passwords via AES-256 CBC; the salt, IV, and key data are used to encrypt/decrypt all passwords, including those in config backups embedded in the ...

CVE-2019-15803

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50AAHH.0C0. 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 fdssyspassDebugPasswdret. The...

CVE-2019-15803

The CVE-2019-15803 issue affects Zyxel GS1900 devices running firmware prior to 2.50(AAHH.0)C0. It stems from an undocumented keypress sequence that triggers a diagnostics shell via CTRL-ALT-t. The slider of access checks (fds_sys_remoteDebugEnable_ret in libfds.so) always returns TRUE, bypassing...

CVE-2019-15804

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50AAHH.0C0. 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...

CVE-2019-15804

CVE-2019-15804 affects Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. By sending SIGQUIT to the CLI process (e.g., CTRL+\ via SSH), an undocumented menu can be triggered, exposing a "Password recovery for specific user" option. Access control blocks the menu, but it is believed to be r...

CVE-2015-7256

ZyXEL NWA1100-N, NWA1100-NH, NWA1121-NI, NWA1123-AC, and NWA1123-NI access points; P-660HN-51, P-663HN-51, VMG1312-B10A, VMG1312-B30A, VMG1312-B30B, VMG4380-B10A, VMG8324-B10A, VMG8924-B10A, VMG8924-B30A, and VSG1435-B101 DSL CPEs; PMG5318-B20A GPONs; SBG3300-N000, SBG3300-NB00, and SBG3500-N000...