Vulnerability CVE-2018-19524
Published: 2019-03-21

Description:
An issue was discovered on Shenzhen Skyworth DT741 Converged Intelligent Terminal (G/EPON+IPTV) SDOTBGN1, DT721-cb SDOTBGN1, and DT741-cb SDOTBGN1 devices. A long password to the Web_passwd function allows remote attackers to cause a denial of service (segmentation fault) or achieve unauthenticated remote code execution because of control of registers S0 through S4 and T4 through T7.

Type:

CWE-20

 (Improper Input Validation)

CVSS2 => (AV:N/AC:L/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
10/10
10/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Skyworthdigital -> Dt721-cb firmware 
Skyworthdigital -> Dt740 firmware 
Skyworthdigital -> Dt741-cb firmware 

 References:
http://packetstormsecurity.com/files/151608/Skyworth-GPON-HomeGateways-Optical-Network-Stack-Overflow.html
http://seclists.org/fulldisclosure/2019/Feb/30
https://s3curityb3ast.github.io/KSA-Dev-001.md
https://seclists.org/bugtraq/2019/Feb/21
https://www.breakthesec.com/2019/02/cve-2018-19524-stack-overflow-in.html
https://www.exploit-db.com/exploits/46358/
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