Title: Feng Multiple Remote Buffer Overflow and Denial of Service Vulnerabilities
Severity: HIGH
Description:
Feng is a freely available multimedia streaming server that supports RTSP and RTP (Real-Time Streaming protocols).
Feng is prone to multiple remote buffer-overflow and denial-of-service vulnerabilities:
- Two buffer-overflow vulnerabilities reside in the 'RTSP_valid_response_msg()' function in the 'rtsp/RTSP_state_machine.c' source file. These issues stem from the improper use of 'sscanf()' when copying user-supplied data to a statically allocated buffer.
- An integer-overflow vulnerability resides in the 'RTSP_remove_msg()' function in the 'rtsp/RTSP_lowlevel.c' source file. This issue allows attackers to trigger excessively large memory move operations that will crash the application.
- A NULL-pointer dereference vulnerability occurs in the 'parse_transport_header()' function in the 'rtsp/RTSP_setup.c' source file.
- A NULL-pointer dereference vulnerability occurs in the 'parse_play_time_range()' function in the 'rtsp/RTSP_play.c' source file.
- A NULL-pointer dereference vulnerability occurs in the 'log_user_agent()' function in the 'rtsp/RTSP_utils.c' source file.
- A NULL-pointer dereference vulnerability occurs in the 'Url_init()' function in the 'utils/url.c' source file of the Netembryo 0.0.4 library. This vulnerability is exposed because of the interaction of Feng and Netembryo, and is only a denial-of-service issue because of Feng's passing of '/:' sequences to the library in URIs.
Successfully exploiting these issues allows remote attackers to execute arbitrary code in the context of the server application. Attackers may also crash the application, denying service to legitimate users.
Feng 0.1.15 is vulnerable to these issues; other versions may also be affected.
Affected Products:
- Feng Feng 0.1.15
- Netembryo Netembryo 0.0.4
References:
- Feng: Feng Home Page
- Netembryo: Netembryo Product Page
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