Vulnerability Details CVE-2019-15802
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. The firmware hashes and encrypts passwords using a hardcoded cryptographic key in sal_util_str_encrypt() in libsal.so.0.0. The parameters (salt, IV, and key data) are used to encrypt and decrypt all passwords using AES256 in CBC mode. With the parameters known, all previously encrypted passwords can be decrypted. This includes the passwords that are part of configuration backups or otherwise embedded as part of the firmware.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 51.7%
CVSS Severity
CVSS v3 Score 5.9
CVSS v2 Score 4.3
References
Products affected by CVE-2019-15802
-
cpe:2.3:h:zyxel:gs1900-10hp:-
-
cpe:2.3:h:zyxel:gs1900-16:-
-
cpe:2.3:h:zyxel:gs1900-24:-
-
cpe:2.3:h:zyxel:gs1900-24e:-
-
cpe:2.3:h:zyxel:gs1900-24hp:-
-
cpe:2.3:h:zyxel:gs1900-48:-
-
cpe:2.3:h:zyxel:gs1900-48hp:-
-
cpe:2.3:h:zyxel:gs1900-8:-
-
cpe:2.3:h:zyxel:gs1900-8hp:-
-
cpe:2.3:o:zyxel:gs1900-10hp_firmware:-
-
cpe:2.3:o:zyxel:gs1900-10hp_firmware:2.40
-
cpe:2.3:o:zyxel:gs1900-16_firmware:-
-
cpe:2.3:o:zyxel:gs1900-16_firmware:2.40
-
cpe:2.3:o:zyxel:gs1900-24_firmware:-
-
cpe:2.3:o:zyxel:gs1900-24_firmware:2.40
-
cpe:2.3:o:zyxel:gs1900-24e_firmware:-
-
cpe:2.3:o:zyxel:gs1900-24e_firmware:2.40
-
cpe:2.3:o:zyxel:gs1900-24hp_firmware:-
-
cpe:2.3:o:zyxel:gs1900-24hp_firmware:2.40
-
cpe:2.3:o:zyxel:gs1900-48_firmware:-
-
cpe:2.3:o:zyxel:gs1900-48_firmware:2.40
-
cpe:2.3:o:zyxel:gs1900-48hp_firmware:-
-
cpe:2.3:o:zyxel:gs1900-48hp_firmware:2.40
-
cpe:2.3:o:zyxel:gs1900-8_firmware:-
-
cpe:2.3:o:zyxel:gs1900-8_firmware:2.40
-
cpe:2.3:o:zyxel:gs1900-8hp_firmware:-
-
cpe:2.3:o:zyxel:gs1900-8hp_firmware:2.40