diff -up libtirpc-0.2.4/src/rpcb_prot.c.orig libtirpc-0.2.4/src/rpcb_prot.c --- libtirpc-0.2.4/src/rpcb_prot.c.orig 2013-12-09 15:59:51.000000000 -0500 +++ libtirpc-0.2.4/src/rpcb_prot.c 2017-05-17 13:05:47.562168877 -0400 @@ -41,6 +41,7 @@ #include #include #include +#include "rpc_com.h" bool_t xdr_rpcb(xdrs, objp) @@ -53,13 +54,13 @@ xdr_rpcb(xdrs, objp) if (!xdr_u_int32_t(xdrs, &objp->r_vers)) { return (FALSE); } - if (!xdr_string(xdrs, &objp->r_netid, (u_int)~0)) { + if (!xdr_string(xdrs, &objp->r_netid, RPC_MAXDATASIZE)) { return (FALSE); } - if (!xdr_string(xdrs, &objp->r_addr, (u_int)~0)) { + if (!xdr_string(xdrs, &objp->r_addr, RPC_MAXDATASIZE)) { return (FALSE); } - if (!xdr_string(xdrs, &objp->r_owner, (u_int)~0)) { + if (!xdr_string(xdrs, &objp->r_owner, RPC_MAXDATASIZE)) { return (FALSE); } return (TRUE); @@ -159,19 +160,19 @@ xdr_rpcb_entry(xdrs, objp) XDR *xdrs; rpcb_entry *objp; { - if (!xdr_string(xdrs, &objp->r_maddr, (u_int)~0)) { + if (!xdr_string(xdrs, &objp->r_maddr, RPC_MAXDATASIZE)) { return (FALSE); } - if (!xdr_string(xdrs, &objp->r_nc_netid, (u_int)~0)) { + if (!xdr_string(xdrs, &objp->r_nc_netid, RPC_MAXDATASIZE)) { return (FALSE); } if (!xdr_u_int32_t(xdrs, &objp->r_nc_semantics)) { return (FALSE); } - if (!xdr_string(xdrs, &objp->r_nc_protofmly, (u_int)~0)) { + if (!xdr_string(xdrs, &objp->r_nc_protofmly, RPC_MAXDATASIZE)) { return (FALSE); } - if (!xdr_string(xdrs, &objp->r_nc_proto, (u_int)~0)) { + if (!xdr_string(xdrs, &objp->r_nc_proto, RPC_MAXDATASIZE)) { return (FALSE); } return (TRUE); @@ -292,7 +293,7 @@ xdr_rpcb_rmtcallres(xdrs, p) bool_t dummy; struct r_rpcb_rmtcallres *objp = (struct r_rpcb_rmtcallres *)(void *)p; - if (!xdr_string(xdrs, &objp->addr, (u_int)~0)) { + if (!xdr_string(xdrs, &objp->addr, RPC_MAXDATASIZE)) { return (FALSE); } if (!xdr_u_int(xdrs, &objp->results.results_len)) { @@ -312,6 +313,11 @@ xdr_netbuf(xdrs, objp) if (!xdr_u_int32_t(xdrs, (u_int32_t *) &objp->maxlen)) { return (FALSE); } + + if (objp->maxlen > RPC_MAXDATASIZE) { + return (FALSE); + } + dummy = xdr_bytes(xdrs, (char **)&(objp->buf), (u_int *)&(objp->len), objp->maxlen); return (dummy); diff -up libtirpc-0.2.4/src/rpcb_st_xdr.c.orig libtirpc-0.2.4/src/rpcb_st_xdr.c --- libtirpc-0.2.4/src/rpcb_st_xdr.c.orig 2013-12-09 15:59:51.000000000 -0500 +++ libtirpc-0.2.4/src/rpcb_st_xdr.c 2017-05-17 13:05:47.562168877 -0400 @@ -38,6 +38,7 @@ #include #include +#include "rpc_com.h" /* Link list of all the stats about getport and getaddr */ @@ -59,7 +60,7 @@ xdr_rpcbs_addrlist(xdrs, objp) if (!xdr_int(xdrs, &objp->failure)) { return (FALSE); } - if (!xdr_string(xdrs, &objp->netid, (u_int)~0)) { + if (!xdr_string(xdrs, &objp->netid, RPC_MAXDATASIZE)) { return (FALSE); } @@ -110,7 +111,7 @@ xdr_rpcbs_rmtcalllist(xdrs, objp) IXDR_PUT_INT32(buf, objp->failure); IXDR_PUT_INT32(buf, objp->indirect); } - if (!xdr_string(xdrs, &objp->netid, (u_int)~0)) { + if (!xdr_string(xdrs, &objp->netid, RPC_MAXDATASIZE)) { return (FALSE); } if (!xdr_pointer(xdrs, (char **)&objp->next, @@ -148,7 +149,7 @@ xdr_rpcbs_rmtcalllist(xdrs, objp) objp->failure = (int)IXDR_GET_INT32(buf); objp->indirect = (int)IXDR_GET_INT32(buf); } - if (!xdr_string(xdrs, &objp->netid, (u_int)~0)) { + if (!xdr_string(xdrs, &objp->netid, RPC_MAXDATASIZE)) { return (FALSE); } if (!xdr_pointer(xdrs, (char **)&objp->next, @@ -176,7 +177,7 @@ xdr_rpcbs_rmtcalllist(xdrs, objp) if (!xdr_int(xdrs, &objp->indirect)) { return (FALSE); } - if (!xdr_string(xdrs, &objp->netid, (u_int)~0)) { + if (!xdr_string(xdrs, &objp->netid, RPC_MAXDATASIZE)) { return (FALSE); } if (!xdr_pointer(xdrs, (char **)&objp->next, diff -up libtirpc-0.2.4/src/rpc_generic.c.orig libtirpc-0.2.4/src/rpc_generic.c --- libtirpc-0.2.4/src/rpc_generic.c.orig 2013-12-09 15:59:51.000000000 -0500 +++ libtirpc-0.2.4/src/rpc_generic.c 2017-05-17 13:05:47.562168877 -0400 @@ -615,6 +615,9 @@ __rpc_taddr2uaddr_af(int af, const struc switch (af) { case AF_INET: + if (nbuf->len < sizeof(*sin)) { + return NULL; + } sin = nbuf->buf; if (inet_ntop(af, &sin->sin_addr, namebuf, sizeof namebuf) == NULL) @@ -626,6 +629,9 @@ __rpc_taddr2uaddr_af(int af, const struc break; #ifdef INET6 case AF_INET6: + if (nbuf->len < sizeof(*sin6)) { + return NULL; + } sin6 = nbuf->buf; if (inet_ntop(af, &sin6->sin6_addr, namebuf6, sizeof namebuf6) == NULL) @@ -668,6 +674,8 @@ __rpc_uaddr2taddr_af(int af, const char port = 0; sin = NULL; + if (uaddr == NULL) + return NULL; addrstr = strdup(uaddr); if (addrstr == NULL) return NULL; diff -up libtirpc-0.2.4/src/xdr.c.orig libtirpc-0.2.4/src/xdr.c --- libtirpc-0.2.4/src/xdr.c.orig 2013-12-09 15:59:51.000000000 -0500 +++ libtirpc-0.2.4/src/xdr.c 2017-05-17 13:05:47.563168892 -0400 @@ -43,8 +43,10 @@ #include #include +#include #include #include +#include typedef quad_t longlong_t; /* ANSI long long type */ typedef u_quad_t u_longlong_t; /* ANSI unsigned long long type */ @@ -54,7 +56,6 @@ typedef u_quad_t u_longlong_t; */ #define XDR_FALSE ((long) 0) #define XDR_TRUE ((long) 1) -#define LASTUNSIGNED ((u_int) 0-1) /* * for unit alignment @@ -630,6 +631,7 @@ xdr_bytes(xdrs, cpp, sizep, maxsize) { char *sp = *cpp; /* sp is the actual string pointer */ u_int nodesize; + bool_t ret, allocated = FALSE; /* * first deal with the length since xdr bytes are counted @@ -653,6 +655,7 @@ xdr_bytes(xdrs, cpp, sizep, maxsize) } if (sp == NULL) { *cpp = sp = mem_alloc(nodesize); + allocated = TRUE; } if (sp == NULL) { warnx("xdr_bytes: out of memory"); @@ -661,7 +664,14 @@ xdr_bytes(xdrs, cpp, sizep, maxsize) /* FALLTHROUGH */ case XDR_ENCODE: - return (xdr_opaque(xdrs, sp, nodesize)); + ret = xdr_opaque(xdrs, sp, nodesize); + if ((xdrs->x_op == XDR_DECODE) && (ret == FALSE)) { + if (allocated == TRUE) { + free(sp); + *cpp = NULL; + } + } + return (ret); case XDR_FREE: if (sp != NULL) { @@ -755,6 +765,7 @@ xdr_string(xdrs, cpp, maxsize) char *sp = *cpp; /* sp is the actual string pointer */ u_int size; u_int nodesize; + bool_t ret, allocated = FALSE; /* * first deal with the length since xdr strings are counted-strings @@ -794,8 +805,10 @@ xdr_string(xdrs, cpp, maxsize) switch (xdrs->x_op) { case XDR_DECODE: - if (sp == NULL) + if (sp == NULL) { *cpp = sp = mem_alloc(nodesize); + allocated = TRUE; + } if (sp == NULL) { warnx("xdr_string: out of memory"); return (FALSE); @@ -804,7 +817,14 @@ xdr_string(xdrs, cpp, maxsize) /* FALLTHROUGH */ case XDR_ENCODE: - return (xdr_opaque(xdrs, sp, size)); + ret = xdr_opaque(xdrs, sp, size); + if ((xdrs->x_op == XDR_DECODE) && (ret == FALSE)) { + if (allocated == TRUE) { + free(sp); + *cpp = NULL; + } + } + return (ret); case XDR_FREE: mem_free(sp, nodesize); @@ -824,7 +844,7 @@ xdr_wrapstring(xdrs, cpp) XDR *xdrs; char **cpp; { - return xdr_string(xdrs, cpp, LASTUNSIGNED); + return xdr_string(xdrs, cpp, RPC_MAXDATASIZE); } /*