A vulnerability, which was classified as critical, has been found in Yealink SIP-T38G (IP Phone Software) (the affected version unknown). This issue affects an unknown part. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

cgi-bin/cgiServer.exx in Yealink VoIP Phone SIP-T38G allows remote authenticated users to execute arbitrary commands by calling the system method in the body of a request, as demonstrated by running unauthorized services, changing directory permissions, and modifying files.

The weakness was published 08/03/2014 (Website). It is possible to read the advisory at osvdb.org. The identification of this vulnerability is CVE-2013-5758 since 09/18/2013. The exploitation is known to be easy. The attack may be initiated remotely. A simple authentication is necessary for exploitation. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

The exploit is available at exploit-db.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Exploit-DB (33741). Similar entries are available at 70534 and 70533.

Productinfo

Type

• IP Phone Software

Vendor

• Yealink

Name

• SIP-T38G

CPE 2.3info

• 🔍

CPE 2.2info

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