What is CVE-2018-16221?

CVE-2018-16221 is a high-severity vulnerability in Yealink Ultra-Elegant Ip Phone Sip-T41p, classified under Path Traversal. CVSS score: 8.0/10. Published 2019-05-29.

How severe is CVE-2018-16221?

High severity. CVSS v3 base score is 8.0 out of 10.

Path Traversal in Yealink Ultra-Elegant Ip Phone Sip-T41p

CVE-2018-16221

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).

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.015 (71.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Yealink Ultra-elegant_ip_phone_sip-t41p
Yealink Ultra-elegant_ip_phone_sip-t41p_firmware — versions 66.83.0.35
N/a — versions n/a

Weakness classification (CWE)

CWE-22 — Path Traversal

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2018-16221?: CVE-2018-16221 is a high-severity vulnerability in Yealink Ultra-Elegant Ip Phone Sip-T41p, classified under Path Traversal. CVSS score: 8.0/10. Published 2019-05-29.
How severe is CVE-2018-16221?: High severity. CVSS v3 base score is 8.0 out of 10.