commit 028f60d6f626688a46a599faebc90a91d68d9d46 Author: Mike Perry mikeperry-git@torproject.org Date: Mon Sep 29 14:30:19 2014 -0700

Bug 13028: Prevent potential proxy bypass cases.

It looks like these cases should only be invoked in the NSS command line tools, and not the browser, but I decided to patch them anyway because there literally is a maze of network function pointers being passed around, and it's very hard to tell if some random code might not pass in the proper proxied versions of the networking code here by accident. --- security/nss/lib/certhigh/ocsp.c | 8 ++++++++ .../lib/libpkix/pkix_pl_nss/module/pkix_pl_socket.c | 21 +++++++++++++++++++++ 2 files changed, 29 insertions(+)

diff --git a/security/nss/lib/certhigh/ocsp.c b/security/nss/lib/certhigh/ocsp.c index cea8456606bf..86fa971cfbef 100644 --- a/security/nss/lib/certhigh/ocsp.c +++ b/security/nss/lib/certhigh/ocsp.c @@ -2932,6 +2932,14 @@ ocsp_ConnectToHost(const char *host, PRUint16 port) PRNetAddr addr; char *netdbbuf = NULL;

+ // XXX: Do we need a unittest ifdef here? We don't want to break the tests, but + // we want to ensure nothing can ever hit this code in production. +#if 1 + printf("Tor Browser BUG: Attempted OSCP direct connect to %s, port %u\n", host, + port); + goto loser; +#endif + sock = PR_NewTCPSocket(); if (sock == NULL) goto loser; diff --git a/security/nss/lib/libpkix/pkix_pl_nss/module/pkix_pl_socket.c b/security/nss/lib/libpkix/pkix_pl_nss/module/pkix_pl_socket.c index e8698376b5be..85791d84a932 100644 --- a/security/nss/lib/libpkix/pkix_pl_nss/module/pkix_pl_socket.c +++ b/security/nss/lib/libpkix/pkix_pl_nss/module/pkix_pl_socket.c @@ -1334,6 +1334,13 @@ pkix_pl_Socket_Create( plContext), PKIX_COULDNOTCREATESOCKETOBJECT);

+ // XXX: Do we need a unittest ifdef here? We don't want to break the tests, but + // we want to ensure nothing can ever hit this code in production. +#if 1 + printf("Tor Browser BUG: Attempted pkix direct socket connect\n"); + PKIX_ERROR(PKIX_PRNEWTCPSOCKETFAILED); +#endif + socket->isServer = isServer; socket->timeout = timeout; socket->clientSock = NULL; @@ -1433,6 +1440,13 @@ pkix_pl_Socket_CreateByName(

localCopyName = PL_strdup(serverName);

+ // XXX: Do we need a unittest ifdef here? We don't want to break the tests, but + // we want to ensure nothing can ever hit this code in production. +#if 1 + printf("Tor Browser BUG: Attempted pkix direct connect to %s\n", serverName); + PKIX_ERROR(PKIX_PRNEWTCPSOCKETFAILED); +#endif + sepPtr = strchr(localCopyName, ':'); /* First strip off the portnum, if present, from the end of the name */ if (sepPtr) { @@ -1582,6 +1596,13 @@ pkix_pl_Socket_CreateByHostAndPort( PKIX_ENTER(SOCKET, "pkix_pl_Socket_CreateByHostAndPort"); PKIX_NULLCHECK_THREE(hostname, pStatus, pSocket);

+ // XXX: Do we need a unittest ifdef here? We don't want to break the tests, but + // we want to ensure nothing can ever hit this code in production. +#if 1 + printf("Tor Browser BUG: Attempted pkix direct connect to %s, port %u\n", hostname, + portnum); + PKIX_ERROR(PKIX_PRNEWTCPSOCKETFAILED); +#endif

prstatus = PR_GetHostByName(hostname, buf, sizeof(buf), &hostent);