Yealink phones through 2019-08-04 do not properly check user roles in POST requests. Consequently, the default User account (with a password of user) can make admin requests via HTTP.
CVSS 3.x
| Source | Score | Severity | Vector | Exploitability | Impact |
|---|---|---|---|---|---|
| nvd@nist.gov | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | 2.8 | 5.9 |
CVSS 2.0
Severity: HIGH
Problem Type: CWE-434,
Products Affected
| Vendor | Product | Version |
|---|---|---|
| yeahlink | t49g_firmware | * |
| yeahlink | vp59_firmware | * |
| yeahlink | t58v_firmware | * |
Yealink phones through 2019-08-04 have an issue with OpenVPN file upload. They execute tar as root to extract files, but do not validate the extraction directory. Creating a tar file with ../../../../ allows replacement of almost any file on a phone. This leads to password replacement and arbitrary code execution as root.
CVSS 3.x
| Source | Score | Severity | Vector | Exploitability | Impact |
|---|---|---|---|---|---|
| nvd@nist.gov | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | 2.8 | 5.9 |
CVSS 2.0
Severity: HIGH
Problem Type: CWE-22,CWE-434,
Products Affected
| Vendor | Product | Version |
|---|---|---|
| yeahlink | t49g_firmware | * |
| yeahlink | vp59_firmware | * |
| yeahlink | t58v_firmware | * |