What is CVE-2019-15802?

CVE-2019-15802 is a medium-severity vulnerability in Zyxel Gs1900-10hp, classified under Use of Hard-coded Credentials. CVSS score: 5.9/10. Published 2019-11-14.

How severe is CVE-2019-15802?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Is CVE-2019-15802 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Zyxel Gs1900-10hp

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.

EPSS: 0.015 (72.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2019-15802?: CVE-2019-15802 is a medium-severity vulnerability in Zyxel Gs1900-10hp, classified under Use of Hard-coded Credentials. CVSS score: 5.9/10. Published 2019-11-14.
How severe is CVE-2019-15802?: Medium severity. CVSS v3 base score is 5.9 out of 10.
Is CVE-2019-15802 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.