Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2020-29299

Severity CVSS v4.0:
Pending analysis
Type:
CWE-77 Command Injection
Publication date:
27/12/2020
Last modified:
05/01/2021

Description

Certain Zyxel products allow command injection by an admin via an input string to chg_exp_pwd during a password-change action. This affects VPN On-premise before ZLD V4.39 week38, VPN Orchestrator before SD-OS V10.03 week32, USG before ZLD V4.39 week38, USG FLEX before ZLD V4.55 week38, ATP before ZLD V4.55 week38, and NSG before 1.33 patch 4.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.20 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.20
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:S/C:C/I:C/A:C CVSS v2.0 Severity and Metrics:

Base Score: 9.00 HIGH
Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): Single
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete

Base Score 2.0
9.00
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:zyxel:vpn_orchestrator:*:*:*:*:*:*:*:* 10.03 (excluding)
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:* 4.39 (excluding)
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:* 4.55 (excluding)
cpe:2.3:h:zyxel:usg_flex:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:* 4.55 (excluding)
cpe:2.3:h:zyxel:atp:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:nsg_firmware:*:*:*:*:*:*:*:* 1.33 (excluding)
cpe:2.3:o:zyxel:nsg_firmware:1.33:-:*:*:*:*:*:*
cpe:2.3:o:zyxel:nsg_firmware:1.33:patch1:*:*:*:*:*:*
cpe:2.3:h:zyxel:nsg:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:usg_flex_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:* 4.39 (excluding)
cpe:2.3:h:zyxel:usg_flex:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools