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Multiple vulnerabilities in Tenda PA6 Wi-Fi Powerline extender



Published: 2020-06-30
Severity High
Patch available NO
Number of vulnerabilities 3
CVE ID CVE-2019-19506
CVE-2019-19505
CVE-2019-16213
CWE ID CWE-20
CWE-121
CWE-77
Exploitation vector Network
Public exploit N/A
Vulnerable software
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PA6 Wi-Fi Powerline extender
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor Shenzhen Tenda Technology Co.,Ltd.

Security Advisory

1) Input validation error

Severity: Medium

CVSSv3: 6.9 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C] [PCI]

CVE-ID: CVE-2019-19506

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the "homeplugd" process. A remote attacker can send a specially crafted UDP packet and perform a denial of service (DoS) attack.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

PA6 Wi-Fi Powerline extender: 1.0.1.21

CPE External links

https://securityintelligence.com/posts/vulnerable-powerline-extenders-underline-lax-iot-security/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Stack-based buffer overflow

Severity: High

CVSSv3: 9 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C] [PCI]

CVE-ID: CVE-2019-19505

CWE-ID: CWE-121 - Stack-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in "Wireless" section in the web-UI. A remote unauthenticated attacker can send a specially crafted hostname, trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

PA6 Wi-Fi Powerline extender: 1.0.1.21

CPE External links

https://securityintelligence.com/posts/vulnerable-powerline-extenders-underline-lax-iot-security/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Command Injection

Severity: Medium

CVSSv3: 8.1 [CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C] [PCI]

CVE-ID: CVE-2019-16213

CWE-ID: CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary commands on the system.

The vulnerability exists due to improper input validation. A remote authenticated attacker can send a specially crafted string, modify the device name of an attached PLC adapter and execute arbitrary commands on the target system.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

PA6 Wi-Fi Powerline extender: 1.0.1.21

CPE External links

https://securityintelligence.com/posts/vulnerable-powerline-extenders-underline-lax-iot-security/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.