A vulnerability was found in Milesight UR32L 32.3.0.5. It has been rated as critical. This issue affects the function set_openvpn_client of the file vtysh_ubus of the component HTTP Request Handler. The manipulation of the argument remote_subnet/remote_mask with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Multiple buffer overflow vulnerabilities exist in the vtysh_ubus binary of Milesight UR32L v32.3.0.5 due to the use of an unsafe sprintf pattern. A specially crafted HTTP request can lead to a buffer overflow. An attacker can send HTTP requests to trigger these vulnerabilities.This buffer overflow occurs in the set_openvpn_client function with the remote_subnet and the remote_mask variables when action is 2.

The weakness was presented 07/06/2023 as TALOS-2023-1716. The advisory is shared at talosintelligence.com. The identification of this vulnerability is CVE-2023-25123 since 02/02/2023. Technical details as well as a public exploit are known.

The exploit is available at talosintelligence.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.

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Vendor

• Milesight

Name

• UR32L

Version

• 32.3.0.5

License

• commercial

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CPE 2.2info

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