CVE-2019-14657

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 v3 8.8 HIGH
CVSS v2.0 9.0 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:S/C:C/I:C/A:C

Exploitability : 8.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
http://cerebusforensics.com/yealink/exploit.html	Exploit Third Party Advisory
https://sway.office.com/3pCb559LYVuT0eig	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:h:yeahlink:vp59:-:*:*:*:*:*:*:*

cpe:2.3:o:yeahlink:vp59_firmware:*:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:h:yeahlink:t49g:-:*:*:*:*:*:*:*

cpe:2.3:o:yeahlink:t49g_firmware:*:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:h:yeahlink:t58v:-:*:*:*:*:*:*:*

cpe:2.3:o:yeahlink:t58v_firmware:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2019-10-08 13:15

Updated : 2019-10-18 14:47

NVD link : CVE-2019-14657

Mitre link : CVE-2019-14657

CVE.ORG link : CVE-2019-14657

JSON object : View

Products Affected

yeahlink

t58v_firmware
vp59
t58v
t49g_firmware
t49g
vp59_firmware

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-434

Unrestricted Upload of File with Dangerous Type

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