VDB-152372 · CVE-2020-10823 · GCVE-0-2020-10823

DrayTek Vigor3900/Vigor2960/Vigor300B up to 1.5.1 /cgi-bin/activate.cgi var out-of-bounds write

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.5	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in DrayTek Vigor3900, Vigor2960 and Vigor300B up to 1.5.1. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/activate.cgi. Such manipulation of the argument var as part of HTTP Request leads to out-of-bounds write. This vulnerability is uniquely identified as CVE-2020-10823. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in DrayTek Vigor3900, Vigor2960 and Vigor300B up to 1.5.1 (Router Operating System). Affected by this issue is an unknown part of the file /cgi-bin/activate.cgi. The manipulation of the argument var as part of a HTTP Request leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A stack-based buffer overflow in /cgi-bin/activate.cgi through var parameter on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieve code execution via a remote HTTP request (issue 1 of 3).

The weakness was disclosed 03/26/2020. This vulnerability is handled as CVE-2020-10823 since 03/22/2020. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries VDB-152376, VDB-152375, VDB-152374 and VDB-152373 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Router Operating System

Vendor

DrayTek

Name

Version

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.5

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/22/2020 🔍
03/26/2020 +4 days 🔍
03/27/2020 +1 days 🔍
05/05/2025 +1865 days 🔍

Sourcesinfo

Advisory: slashd.ga
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-10823 (🔍)
GCVE (CVE): GCVE-0-2020-10823
GCVE (VulDB): GCVE-100-152372
See also: 🔍

Entryinfo

Created: 03/27/2020 07:41
Updated: 05/05/2025 19:43
Changes: 03/27/2020 07:41 (38), 03/27/2020 07:46 (18), 10/05/2020 08:33 (1), 05/12/2024 07:12 (17), 05/05/2025 19:43 (1)
Complete: 🔍
Cache ID: 216::103