Format string vulnerability in the ws_addarg function in webserver.c in mt-dappd in Firefly Media Server 0.2.4 and earlier allows remote attackers to execute arbitrary code via a stats method action to /xml-rpc with format string specifiers in the (1) username or (2) password portion of base64-encoded data on the Authorization: Basic HTTP header line.
The product uses a function that accepts a format string as an argument, but the format string originates from an external source.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Media_server | Firefly | 0.2.4 (including) | 0.2.4 (including) |
| Mt-daapd | Ubuntu | feisty | * |
| Mt-daapd | Ubuntu | gutsy | * |
| Mt-daapd | Ubuntu | upstream | * |
When an attacker can modify an externally-controlled format string, this can lead to buffer overflows, denial of service, or data representation problems. It should be noted that in some circumstances, such as internationalization, the set of format strings is externally controlled by design. If the source of these format strings is trusted (e.g. only contained in library files that are only modifiable by the system administrator), then the external control might not itself pose a vulnerability.