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CVE-2017-8415

CRITICAL

9.8

Description

An issue was discovered on D-Link DCS-1100 and DCS-1130 devices. The device has a custom telnet daemon as a part of the busybox and retrieves the password from the shadow file using the function getspnam at address 0x00053894. Then performs a crypt operation on the password retrieved from the user at address 0x000538E0 and performs a strcmp at address 0x00053908 to check if the password is correct or incorrect. However, the /etc/shadow file is a part of CRAM-FS filesystem which means that the user cannot change the password and hence a hardcoded hash in /etc/shadow is used to match the credentials provided by the user. This is a salted hash of the string "admin" and hence it acts as a password to the device which cannot be changed as the whole filesystem is read only.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published7/2/2019

Last Modified11/21/2024

Sourcenvd

Honeypot Sightings0

Affected Products

dlink:dcs-1100dlink:dcs-1100_firmwaredlink:dcs-1130dlink:dcs-1130_firmware

Weaknesses (CWE)

CWE-798

References

http://packetstormsecurity.com/files/153226/Dlink-DCS-1130-Command-Injection-CSRF-Stack-Overflow.html(cve@mitre.org)

https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Dlink_DCS_1130_security.pdf(cve@mitre.org)

https://seclists.org/bugtraq/2019/Jun/8(cve@mitre.org)

http://packetstormsecurity.com/files/153226/Dlink-DCS-1130-Command-Injection-CSRF-Stack-Overflow.html(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Dlink_DCS_1130_security.pdf(af854a3a-2127-422b-91ae-364da2661108)

https://seclists.org/bugtraq/2019/Jun/8(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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