IAHispano Applio up to 3.2.8-bugfix restart.py stop_train injection

Summaryinfo

A vulnerability labeled as problematic has been found in IAHispano Applio up to 3.2.8-bugfix. This issue affects the function stop_train of the file restart.py. Such manipulation leads to injection. This vulnerability is listed as CVE-2025-27787. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in IAHispano Applio up to 3.2.8-bugfix and classified as critical. Affected by this issue is the function stop_train of the file restart.py. The manipulation with an unknown input leads to a injection vulnerability. Using CWE to declare the problem leads to CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Applio is a voice conversion tool. Versions 3.2.8-bugfix and prior are vulnerable to denial of service (DoS) in restart.py. `model_name` in train.py takes user input, and passes it to the `stop_train` function in restart.py, which uses it construct a path to a folder with `config.json`. That `config.json` is opened and the list of values under "process_pids" are read. Next all the process IDs listed in the JSON are killed. Using one of the arbitrary file writes, one can write to `logs/foobar` a `config.json` file, which contains a list of process IDs. Then one can access this endpoint to kill these processes. Since an attacker can't know what process is running on which process ID, they can send a list of hundreds of process IDs, which can kill the process that applio is using to run, as well as other, potentially important processes, which leads to DoS. Note that constructing a path with user input also enables path traversal. For example, by supplying "../../" in `model_name` one can access `config.json` freom locations two folders down on the server. As of time of publication, no known patches are available.

The advisory is shared for download at securitylab.github.com. This vulnerability is handled as CVE-2025-27787 since 03/06/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/01/2025). The MITRE ATT&CK project declares the attack technique as T1055.

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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Productinfo

Vendor

• IAHispano

Name

• Applio

Version

• 3.2.8-bugfix

CPE 2.3info

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CPE 2.2info

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