Vulnerability Monitor

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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.

Published

2019-11-14T21:15:11.797

Last Modified

2024-11-21T04:29:29.790

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.9 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:N/A:N

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: NONE
  • Availability Impact: NONE
Exploitability Score

8.6

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-798
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System zyxel gs1900-8_firmware < 2.50\(aahh.0\)c0 Yes
Hardware zyxel gs1900-8 - No
Operating System zyxel gs1900-8hp_firmware < 2.50\(aahi.0\)c0 Yes
Hardware zyxel gs1900-8hp - No
Operating System zyxel gs1900-10hp_firmware < 2.50\(aazi.0\)c0 Yes
Hardware zyxel gs1900-10hp - No
Operating System zyxel gs1900-16_firmware < 2.50\(aahj.0\)c0 Yes
Hardware zyxel gs1900-16 - No
Operating System zyxel gs1900-24e_firmware < 2.50\(aahk.0\)c0 Yes
Hardware zyxel gs1900-24e - No
Operating System zyxel gs1900-24_firmware < 2.50\(aahl.0\)c0 Yes
Hardware zyxel gs1900-24 - No
Operating System zyxel gs1900-24hp_firmware < 2.50\(aahm.0\)c0 Yes
Hardware zyxel gs1900-24hp - No
Operating System zyxel gs1900-48_firmware < 2.50\(aahn.0\)c0 Yes
Hardware zyxel gs1900-48 - No
Operating System zyxel gs1900-48hp_firmware < 2.50\(aaho.0\)c0 Yes
Hardware zyxel gs1900-48hp - No
References