Transmission RPC Integer Overflow DoS (CVE-2017-11882) Analysis and POC

CVE-2017-11882 Vulnerability Summary Vulnerability Overview This vulnerability exists in the Transmission BitTorrent client, specifically in the implementation of its RPC interface (JSON-RPC). Vulnerability Type: Denial of Service (DoS) vulnerability. Trigger Condition: When the client receives an RPC request containing specific malformed data, it triggers an integer overflow. Impact: Causes the client to crash or stop responding, resulting in service interruption. Root Cause: While parsing the parameter in the RPC request, the file path length is not correctly validated, leading to an integer overflow when calculating memory allocation size. Affected Scope Affected Software: Transmission BitTorrent client. Affected Versions: All versions lower than 2.92. Specifically includes early versions such as 2.90, 2.91, etc. Affected Platforms: All platforms running Transmission (Linux, macOS, Windows, BSD, etc.). Remediation Official Fix: Upgrade Transmission to version 2.92 or higher. Temporary Mitigation Measures: Disable the Transmission RPC interface (if remote management is not required). Restrict access to the Transmission RPC port (default 9091) at the firewall level, allowing connections only from trusted IP addresses. POC Code The following Python script extracted from the page is used to trigger this vulnerability: > Note**: This code is for demonstration purposes only and should not be used for illegal activities. Executing this code may cause the target Transmission instance to crash.

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Transmission RPC Integer Overflow DoS (CVE-2017-11882) Analysis and POC