diff options
Diffstat (limited to 'gnu/packages/patches/libtirpc-CVE-2017-8779.patch')
| -rw-r--r-- | gnu/packages/patches/libtirpc-CVE-2017-8779.patch | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/gnu/packages/patches/libtirpc-CVE-2017-8779.patch b/gnu/packages/patches/libtirpc-CVE-2017-8779.patch new file mode 100644 index 0000000000..742e64df25 --- /dev/null +++ b/gnu/packages/patches/libtirpc-CVE-2017-8779.patch @@ -0,0 +1,263 @@ +Fix CVE-2017-8779: + +https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8779 + +Patch copied from the bug reporter's 3rd-party repository: + +https://github.com/guidovranken/rpcbomb/blob/master/libtirpc_patch.txt + +diff --git a/src/rpc_generic.c b/src/rpc_generic.c +index 2f09a8f..589cbd5 100644 +--- a/src/rpc_generic.c ++++ b/src/rpc_generic.c +@@ -615,6 +615,9 @@ __rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf) + + 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 struct netbuf *nbuf) + 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) +@@ -667,6 +673,8 @@ __rpc_uaddr2taddr_af(int af, const char *uaddr) + + port = 0; + sin = NULL; ++ if (uaddr == NULL) ++ return NULL; + addrstr = strdup(uaddr); + if (addrstr == NULL) + return NULL; +diff --git a/src/rpcb_prot.c b/src/rpcb_prot.c +index 43fd385..a923c8e 100644 +--- a/src/rpcb_prot.c ++++ b/src/rpcb_prot.c +@@ -41,6 +41,7 @@ + #include <rpc/types.h> + #include <rpc/xdr.h> + #include <rpc/rpcb_prot.h> ++#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 --git a/src/rpcb_st_xdr.c b/src/rpcb_st_xdr.c +index 08db745..28e6a48 100644 +--- a/src/rpcb_st_xdr.c ++++ b/src/rpcb_st_xdr.c +@@ -37,6 +37,7 @@ + + + #include <rpc/rpc.h> ++#include "rpc_com.h" + + /* Link list of all the stats about getport and getaddr */ + +@@ -58,7 +59,7 @@ 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); + } + +@@ -109,7 +110,7 @@ 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, +@@ -147,7 +148,7 @@ 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, +@@ -175,7 +176,7 @@ 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 --git a/src/xdr.c b/src/xdr.c +index f3fb9ad..b9a1558 100644 +--- a/src/xdr.c ++++ b/src/xdr.c +@@ -42,8 +42,10 @@ + #include <stdlib.h> + #include <string.h> + ++#include <rpc/rpc.h> + #include <rpc/types.h> + #include <rpc/xdr.h> ++#include <rpc/rpc_com.h> + + typedef quad_t longlong_t; /* ANSI long long type */ + typedef u_quad_t u_longlong_t; /* ANSI unsigned long long type */ +@@ -53,7 +55,6 @@ typedef u_quad_t u_longlong_t; /* ANSI unsigned long long type */ + */ + #define XDR_FALSE ((long) 0) + #define XDR_TRUE ((long) 1) +-#define LASTUNSIGNED ((u_int) 0-1) + + /* + * for unit alignment +@@ -629,6 +630,7 @@ 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 +@@ -652,6 +654,7 @@ 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"); +@@ -660,7 +663,14 @@ 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) { +@@ -754,6 +764,7 @@ 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 +@@ -793,8 +804,10 @@ 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); +@@ -803,7 +816,14 @@ 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); +@@ -823,7 +843,7 @@ xdr_wrapstring(xdrs, cpp) + XDR *xdrs; + char **cpp; + { +- return xdr_string(xdrs, cpp, LASTUNSIGNED); ++ return xdr_string(xdrs, cpp, RPC_MAXDATASIZE); + } + + /* |