Alist is a file list program that supports multiple storages, powered by Gin and Solidjs. Prior to version 3.57.0, the application disables TLS certificate verification by default for all outgoing storage driver communications, making the system vulnerable to Man-in-the-Middle (MitM) attacks. This enables the complete decryption, theft, and manipulation of all data transmitted during storage operations, severely compromising the confidentiality and integrity of user data. This issue has been patched in version 3.57.0.
Affected: Go: github.com/alist-org/alist/v3
### Summary The application disables TLS certificate verification by default for all outgoing storage driver communications, making the system vulnerable to Man-in-the-Middle (MitM) attacks. This enables the complete decryption, theft, and manipulation of all data transmitted during storage operations, severely compromising the confidentiality and integrity of user data.
### Details Certificate verification is disabled by default for all storage driver communications.
The `TlsInsecureSkipVerify` setting is default to true in the `DefaultConfig()` function in [internal/conf/config.go](https://github.com/AlistGo/alist/blob/b4d9beb49cba399842a54fcc33bc95a4a09b7bd4/internal/conf/config.go#L159).
~~~go func DefaultConfig() *Config { // ... TlsInsecureSkipVerify: true, // ... } ~~~
This vulnerability enables Man-in-the-Middle (MitM) attacks by disabling TLS certificate verification, allowing attackers to intercept and manipulate all storage communications. Attackers can exploit this through network-level attacks like ARP spoofing, rogue Wi-Fi access points, or compromised internal network equipment to redirect traffic to malicious endpoints. Since certificate validation is skipped, the system will unknowingly establish encrypted connections with attacker-controlled servers, enabling full decryption, data theft, and manipulation of all storage operations without triggering any security warnings.
#### PoC The /etc/hosts file was modified to simulate DNS hijacking…