CVE-2017-8415

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Summary

CVECVE-2017-8415
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-07-02 21:15:00 UTC
Updated2021-04-26 16:09:00 UTC
DescriptionAn 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.

Risk And Classification

Problem Types: CWE-798

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Dlink Dcs-1100 - All All All
Hardware Dlink Dcs-1100 - All All All
Operating System Dlink Dcs-1100 Firmware - All All All
Operating System Dlink Dcs-1100 Firmware - All All All
Hardware Dlink Dcs-1130 - All All All
Hardware Dlink Dcs-1130 - All All All
Operating System Dlink Dcs-1130 Firmware - All All All
Operating System Dlink Dcs-1130 Firmware - All All All

References

ReferenceSourceLinkTags
IoT_vulnerabilities/Dlink_DCS_1130_security.pdf at master · ethanhunnt/IoT_vulnerabilities · GitHub MISC github.com Not Applicable, Third Party Advisory
Dlink DCS-1130 Command Injection / CSRF / Stack Overflow ≈ Packet Storm MISC packetstormsecurity.com Third Party Advisory, VDB Entry
Bugtraq: Newly releases IoT security issues BUGTRAQ seclists.org Mailing List, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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