pupnp vulnerabilities

In pupnp, parse_hostport synchronously calls getaddrinfo while processing attacker-supplied hostnames from inbound HTTP request targets and GENA SUBSCRIBE CALLBACK headers. A remote unauthenticated peer can choose a slow or nonresponsive hostname and block a bounded miniserver worker for the resolver timeout, allowing a small number of requests to exhaust the thread pool and deny UPnP service.

In pupnp, raw_to_int in httpparser.c parses Content-Length with strtol and casts the resulting long to a 32-bit int before storing it as unsigned int. On LP64 systems, values greater than INT_MAX can truncate or wrap, so the HTTP parser may accept a body length different from the declared value. Fixed in 2.0.2.

In pupnp, Transfer-Encoding: chunked causes the HTTP parser to leave content_length at zero while decoded bytes accumulate in msg.entity. The g_maxContentLength checks in http_RecvMessage do not enforce the same limit on decoded chunked bodies, so a remote peer can make the process buffer an entity larger than the configured maximum. Fixed in 2.0.2.

In pupnp, ixmlNode_compare passes the nullable nodeValue, namespaceURI, prefix, and localName fields directly to strcmp, though non-namespaced attributes legitimately leave them NULL. When ixmlElement_removeAttributeNode compares two distinct attributes with the same nodeName, the comparison dereferences NULL and crashes the process. Fixed in 2.0.2.

In pupnp prior to 2.0.0, multiple ixml DOM traversal functions process deeply nested XML with unbounded recursion. An unauthenticated peer on the local network can supply deeply nested XML through a SOAP request, exhaust a service thread's stack, and crash the UPnP service.