TP-Link Archer C20i v003a.0 Build 170221 Rel.55462n HTTP Parameter X_TP_ExternalIPv6Address os command injection

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.
8.8$0-$5k0.00

Summaryinfo

A vulnerability was found in TP-Link Archer C20i v003a.0 Build 170221 Rel.55462n. It has been declared as critical. The impacted element is an unknown function of the component HTTP Parameter Handler. The manipulation of the argument X_TP_ExternalIPv6Address results in os command injection. This vulnerability is identified as CVE-2021-44827. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical has been found in TP-Link Archer C20i v003a.0 Build 170221 Rel.55462n. Affected is some unknown processing of the component HTTP Parameter Handler. The manipulation of the argument X_TP_ExternalIPv6Address with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. 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. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was released 03/05/2022. The advisory is shared for download at full-disclosure.eu. This vulnerability is traded as CVE-2021-44827 since 12/11/2021. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/05/2022). The MITRE ATT&CK project declares the attack technique as T1202.

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

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.8

VulDB Base Score: 8.8
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/11/2021 🔍
03/05/2022 +84 days 🔍
03/05/2022 +0 days 🔍
03/09/2022 +4 days 🔍

Sourcesinfo

Vendor: tp-link.com

Advisory: full-disclosure.eu
Status: Not defined

CVE: CVE-2021-44827 (🔍)
GCVE (CVE): GCVE-0-2021-44827
GCVE (VulDB): GCVE-100-194256

Entryinfo

Created: 03/05/2022 04:58
Updated: 03/09/2022 10:03
Changes: 03/05/2022 04:58 (38), 03/09/2022 10:03 (1)
Complete: 🔍
Cache ID: 216::103

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