CVE-2018-16221 — HIGH (8.0)

Vulnerability Description

The diagnostics web interface in the Yeahlink Ultra-elegant IP Phone SIP-T41P (firmware 66.83.0.35) does not validate (escape) the path information (path traversal), which allows an authenticated remote attacker to get access to privileged information (e.g., /etc/passwd) via path traversal (relative path information in the file parameter of the corresponding POST request).

CVSS Score

8.0

HIGH

CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Yealink	Ultra-Elegant Ip Phone Sip-T41P Firmware	66.83.0.35
Yealink	Ultra-Elegant Ip Phone Sip-T41P	-

Related Weaknesses (CWE)

CWE-22

References

https://www.sit.fraunhofer.de/de/securitytestlab/Third Party Advisory
https://www.sit.fraunhofer.de/fileadmin/dokumente/CVE/Advisory_Yealink_Ultra-eleThird Party Advisory
https://www.sit.fraunhofer.de/de/securitytestlab/Third Party Advisory
https://www.sit.fraunhofer.de/fileadmin/dokumente/CVE/Advisory_Yealink_Ultra-eleThird Party Advisory

FAQ

What is CVE-2018-16221?

CVE-2018-16221 is a vulnerability with a CVSS score of 8.0 (HIGH). The diagnostics web interface in the Yeahlink Ultra-elegant IP Phone SIP-T41P (firmware 66.83.0.35) does not validate (escape) the path information (path traversal), which allows an authenticated remo...

How severe is CVE-2018-16221?

CVE-2018-16221 has been rated HIGH with a CVSS base score of 8.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2018-16221?

Check the references section above for vendor advisories and patch information. Affected products include: Yealink Ultra-Elegant Ip Phone Sip-T41P Firmware, Yealink Ultra-Elegant Ip Phone Sip-T41P.