FishAudio Bert-VITS2 up to 2.3 /config/config.json generate_config data_dir path traversal

Summaryinfo

A vulnerability identified as critical has been detected in FishAudio Bert-VITS2 up to 2.3. Affected by this vulnerability is the function generate_config of the file /config/config.json. This manipulation of the argument data_dir causes path traversal. The identification of this vulnerability is CVE-2024-39688. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in FishAudio Bert-VITS2 up to 2.3. It has been declared as critical. Affected by this vulnerability is the function generate_config of the file /config/config.json. The manipulation of the argument data_dir with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Bert-VITS2 is the VITS2 Backbone with multilingual bert. User input supplied to the data_dir variable is concatenated with other folders and used to open a new file in the generate_config function, which leads to a limited file write. The issue allows for writing /config/config.json file in arbitrary directory on the server. If a given directory path doesn’t exist, the application will return an error, so this vulnerability could also be used to gain information about existing directories on the server. This affects fishaudio/Bert-VITS2 2.3 and earlier.

It is possible to read the advisory at securitylab.github.com. This vulnerability is known as CVE-2024-39688 since 06/27/2024. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/12/2024). The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

By approaching the search of inurl:config/config.json it is possible to find vulnerable targets with Google Hacking.

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

• FishAudio

Name

• Bert-VITS2

Version

• 2.0
• 2.1
• 2.2
• 2.3

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
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