CVE-2020-8515 : DrayTek Vigor2960 1.3.1_Beta, Vigor3900 1.4.4_Beta, and Vigor300B 1.3.3

DrayTek Vigor2960 1.3.1_Beta, Vigor3900 1.4.4_Beta, and Vigor300B 1.3.3_Beta, 1.4.2.1_Beta, and 1.4.4_Beta devices allow remote code execution as root (without authentication) via shell metacharacters to the cgi-bin/mainfunction.cgi URI. This issue has been fixed in Vigor3900/2960/300B v1.5.1.

Published 2020-02-01 13:15:13

Updated 2024-07-25 16:40:16

Source MITRE

View at NVD, CVE.org

Vulnerability category: Execute code

Products affected by CVE-2020-8515

Draytek » Vigor300b Firmware » Version: 1.3.3 Update Beta
cpe:2.3:o:draytek:vigor300b_firmware:1.3.3:beta:*:*:*:*:*:*
Matching versions
When used together with: Draytek » Vigor300b » Version: N/A
Draytek » Vigor300b Firmware » Version: 1.4.2.1 Update Beta
cpe:2.3:o:draytek:vigor300b_firmware:1.4.2.1:beta:*:*:*:*:*:*
Matching versions
When used together with: Draytek » Vigor300b » Version: N/A
Draytek » Vigor300b Firmware » Version: 1.4.4 Update Beta
cpe:2.3:o:draytek:vigor300b_firmware:1.4.4:beta:*:*:*:*:*:*
Matching versions
When used together with: Draytek » Vigor300b » Version: N/A
Draytek » Vigor3900 Firmware » Version: 1.4.4 Update Beta
cpe:2.3:o:draytek:vigor3900_firmware:1.4.4:beta:*:*:*:*:*:*
Matching versions
When used together with: Draytek » Vigor3900 » Version: N/A
Draytek » Vigor2960 Firmware » Version: 1.3.1 Update Beta
cpe:2.3:o:draytek:vigor2960_firmware:1.3.1:beta:*:*:*:*:*:*
Matching versions
When used together with: Draytek » Vigor2960 » Version: N/A

CVE-2020-8515 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:

Multiple DrayTek Vigor Routers Web Management Page Vulnerability

CISA required action:

Apply updates per vendor instructions.

CISA description:

DrayTek Vigor3900, Vigor2960, and Vigor300B routers contain an unspecified vulnerability that allows for remote code execution.

Notes:

https://nvd.nist.gov/vuln/detail/CVE-2020-8515

Added on 2021-11-03 Action due date 2022-05-03

Exploit prediction scoring system (EPSS) score for CVE-2020-8515

EPSS FAQ

96.67%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 100 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-8515

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
10.0	HIGH	AV:N/AC:L/Au:N/C:C/I:C/A:C	10.0	10.0	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2020-8515

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-8515

http://packetstormsecurity.com/files/156979/DrayTek-Vigor2960-Vigor3900-Vigor300B-Remote-Command-Execution.html

DrayTek Vigor2960 / Vigor3900 / Vigor300B Remote Command Execution ≈ Packet Storm
Exploit;Third Party Advisory;VDB Entry
https://sku11army.blogspot.com/2020/01/draytek-unauthenticated-rce-in-draytek.html

[DrayTek] - Unauthenticated RCE in Draytek Vigor 2960, 3900 and 300B (CVE-2020-8515) ~ Skull Army
Permissions Required;Third Party Advisory
https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-(cve-2020-8515)/

Vigor3900 / Vigor2960 / Vigor300B Router Web Management Page Vulnerability (CVE-2020-8515) | DrayTek
Exploit;Vendor Advisory
https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-router-web-management-page-vulnerability-%28cve-2020-8515%29/

Vigor3900 / Vigor2960 / Vigor300B Router Web Management Page Vulnerability (CVE-2020-8515) | DrayTek
Vendor Advisory