CVE-2019-15802
CVSS V2 Medium 4.3
CVSS V3 Medium 5.9
Description
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.
Overview
- CVE ID
- CVE-2019-15802
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2019-11-14T21:15:11
- Last Modified Date
- 2019-11-22T19:11:12
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:zyxel:gs1900-8_firmware:*:*:*:*:*:*:*:* | 1 | OR | 2.50\(aahh.0\)c0 | |
| cpe:2.3:h:zyxel:gs1900-8:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:zyxel:gs1900-8hp_firmware:*:*:*:*:*:*:*:* | 1 | OR | 2.50\(aahi.0\)c0 | |
| cpe:2.3:h:zyxel:gs1900-8hp:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:zyxel:gs1900-10hp_firmware:*:*:*:*:*:*:*:* | 1 | OR | 2.50\(aazi.0\)c0 | |
| cpe:2.3:h:zyxel:gs1900-10hp:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:zyxel:gs1900-16_firmware:*:*:*:*:*:*:*:* | 1 | OR | 2.50\(aahj.0\)c0 | |
| cpe:2.3:h:zyxel:gs1900-16:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:zyxel:gs1900-24e_firmware:*:*:*:*:*:*:*:* | 1 | OR | 2.50\(aahk.0\)c0 | |
| cpe:2.3:h:zyxel:gs1900-24e:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:zyxel:gs1900-24_firmware:*:*:*:*:*:*:*:* | 1 | OR | 2.50\(aahl.0\)c0 | |
| cpe:2.3:h:zyxel:gs1900-24:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:zyxel:gs1900-24hp_firmware:*:*:*:*:*:*:*:* | 1 | OR | 2.50\(aahm.0\)c0 | |
| cpe:2.3:h:zyxel:gs1900-24hp:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:zyxel:gs1900-48_firmware:*:*:*:*:*:*:*:* | 1 | OR | 2.50\(aahn.0\)c0 | |
| cpe:2.3:h:zyxel:gs1900-48:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:zyxel:gs1900-48hp_firmware:*:*:*:*:*:*:*:* | 1 | OR | 2.50\(aaho.0\)c0 | |
| cpe:2.3:h:zyxel:gs1900-48hp:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:P/I:N/A:N
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 4.3
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- HIGH
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- NONE
- Base Score
- 5.9
- Base Severity
- MEDIUM
- Exploitability Score
- 2.2
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml | Vendor Advisory |
| https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html | Exploit Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2019-15802 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15802 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 16:58:46 | Added to TrackCVE | |||
| 2022-12-04 06:24:36 | 2019-11-14T21:15Z | 2019-11-14T21:15:11 | CVE Published Date | updated |
| 2022-12-04 06:24:36 | 2019-11-22T19:11:12 | CVE Modified Date | updated | |
| 2022-12-04 06:24:36 | Analyzed | Vulnerability Status | updated |