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http: Restrict maximum size of request line + headers

Prevent memory exhaustion by sending lots of data.
Also add a test to `httpbasics.py`.

Closes #6425
pull/1/head
Wladimir J. van der Laan 7 years ago
parent
commit
41db8c4733
  1. 14
      qa/rpc-tests/httpbasics.py
  2. 4
      src/httpserver.cpp

14
qa/rpc-tests/httpbasics.py

@ -97,5 +97,19 @@ class HTTPBasicsTest (BitcoinTestFramework): @@ -97,5 +97,19 @@ class HTTPBasicsTest (BitcoinTestFramework):
assert_equal('"error":null' in out1, True)
assert_equal(conn.sock!=None, True) #connection must be closed because bitcoind should use keep-alive by default
# Check excessive request size
conn = httplib.HTTPConnection(urlNode2.hostname, urlNode2.port)
conn.connect()
conn.request('GET', '/' + ('x'*1000), '', headers)
out1 = conn.getresponse()
assert_equal(out1.status, httplib.NOT_FOUND)
conn = httplib.HTTPConnection(urlNode2.hostname, urlNode2.port)
conn.connect()
conn.request('GET', '/' + ('x'*10000), '', headers)
out1 = conn.getresponse()
assert_equal(out1.status, httplib.BAD_REQUEST)
if __name__ == '__main__':
HTTPBasicsTest ().main ()

4
src/httpserver.cpp

@ -38,6 +38,9 @@ @@ -38,6 +38,9 @@
#include <boost/foreach.hpp>
#include <boost/scoped_ptr.hpp>
/** Maximum size of http request (request line + headers) */
static const size_t MAX_HEADERS_SIZE = 8192;
/** HTTP request work item */
class HTTPWorkItem : public HTTPClosure
{
@ -414,6 +417,7 @@ bool InitHTTPServer() @@ -414,6 +417,7 @@ bool InitHTTPServer()
}
evhttp_set_timeout(http, GetArg("-rpcservertimeout", DEFAULT_HTTP_SERVER_TIMEOUT));
evhttp_set_max_headers_size(http, MAX_HEADERS_SIZE);
evhttp_set_max_body_size(http, MAX_SIZE);
evhttp_set_gencb(http, http_request_cb, NULL);

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