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ticket: 5922

version_fixed: 1.5.5

Apply patch for MITKRB5-SA-2008-001.



git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-5@20294 dc483132-0cff-0310-8789-dd5450dbe970
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1 parent 010973a commit 26972ec2e64bdf28c2955d35ded94fa661213fc7 tlyu committed Mar 28, 2008
Showing with 48 additions and 64 deletions.
  1. +2 −2 src/kdc/dispatch.c
  2. +43 −61 src/kdc/kerberos_v4.c
  3. +3 −1 src/kdc/network.c
View
@@ -1,7 +1,7 @@
/*
* kdc/dispatch.c
*
- * Copyright 1990 by the Massachusetts Institute of Technology.
+ * Copyright 1990, 2007 by the Massachusetts Institute of Technology.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
@@ -107,7 +107,7 @@ dispatch(krb5_data *pkt, const krb5_fulladdr *from, krb5_data **response)
retval = KRB5KRB_AP_ERR_MSG_TYPE;
#ifndef NOCACHE
/* put the response into the lookaside buffer */
- if (!retval)
+ if (!retval && *response != NULL)
kdc_insert_lookaside(pkt, *response);
#endif
View
@@ -1,7 +1,7 @@
/*
* kdc/kerberos_v4.c
*
- * Copyright 1985, 1986, 1987, 1988,1991 by the Massachusetts Institute
+ * Copyright 1985, 1986, 1987, 1988,1991,2007 by the Massachusetts Institute
* of Technology.
* All Rights Reserved.
*
@@ -88,11 +88,6 @@ extern int krbONE;
#define MSB_FIRST 0 /* 68000, IBM RT/PC */
#define LSB_FIRST 1 /* Vax, PC8086 */
-int f;
-
-/* XXX several files in libkdb know about this */
-char *progname;
-
#ifndef BACKWARD_COMPAT
static Key_schedule master_key_schedule;
static C_Block master_key;
@@ -144,10 +139,8 @@ static void hang(void);
#include "com_err.h"
#include "extern.h" /* to pick up master_princ */
-static krb5_data *response;
-
-void kerberos_v4 (struct sockaddr_in *, KTEXT);
-void kerb_err_reply (struct sockaddr_in *, KTEXT, long, char *);
+static krb5_data *kerberos_v4 (struct sockaddr_in *, KTEXT);
+static krb5_data *kerb_err_reply (struct sockaddr_in *, KTEXT, long, char *);
static int set_tgtkey (char *, krb5_kvno, krb5_boolean);
/* Attributes converted from V5 to V4 - internal representation */
@@ -263,12 +256,12 @@ process_v4(const krb5_data *pkt, const krb5_fulladdr *client_fulladdr,
(void) klog(L_KRB_PERR, "V4 request too long.");
return KRB5KRB_ERR_FIELD_TOOLONG;
}
+ memset( &v4_pkt, 0, sizeof(v4_pkt));
v4_pkt.length = pkt->length;
v4_pkt.mbz = 0;
memcpy( v4_pkt.dat, pkt->data, pkt->length);
- kerberos_v4( &client_sockaddr, &v4_pkt);
- *resp = response;
+ *resp = kerberos_v4( &client_sockaddr, &v4_pkt);
return(retval);
}
@@ -301,19 +294,20 @@ char * v4_klog( int type, const char *format, ...)
}
static
-int krb4_sendto(int s, const char *msg, int len, int flags,
- const struct sockaddr *to, int to_len)
+krb5_data *make_response(const char *msg, int len)
{
+ krb5_data *response;
+
if ( !(response = (krb5_data *) malloc( sizeof *response))) {
- return ENOMEM;
+ return 0;
}
if ( !(response->data = (char *) malloc( len))) {
krb5_free_data(kdc_context, response);
- return ENOMEM;
+ return 0;
}
response->length = len;
memcpy( response->data, msg, len);
- return( 0);
+ return response;
}
static void
hang(void)
@@ -592,7 +586,7 @@ static void str_length_check(char *str, int max_size)
*cp = 0;
}
-void
+static krb5_data *
kerberos_v4(struct sockaddr_in *client, KTEXT pkt)
{
static KTEXT_ST rpkt_st;
@@ -605,7 +599,7 @@ kerberos_v4(struct sockaddr_in *client, KTEXT pkt)
KTEXT auth = &auth_st;
AUTH_DAT ad_st;
AUTH_DAT *ad = &ad_st;
-
+ krb5_data *response = 0;
static struct in_addr client_host;
static int msg_byte_order;
@@ -643,8 +637,7 @@ kerberos_v4(struct sockaddr_in *client, KTEXT pkt)
inet_ntoa(client_host));
/* send an error reply */
req_name_ptr = req_inst_ptr = req_realm_ptr = "";
- kerb_err_reply(client, pkt, KERB_ERR_PKT_VER, lt);
- return;
+ return kerb_err_reply(client, pkt, KERB_ERR_PKT_VER, lt);
}
/* check packet version */
@@ -654,8 +647,7 @@ kerberos_v4(struct sockaddr_in *client, KTEXT pkt)
KRB_PROT_VERSION, req_version, 0);
/* send an error reply */
req_name_ptr = req_inst_ptr = req_realm_ptr = "";
- kerb_err_reply(client, pkt, KERB_ERR_PKT_VER, lt);
- return;
+ return kerb_err_reply(client, pkt, KERB_ERR_PKT_VER, lt);
}
msg_byte_order = req_msg_type & 1;
@@ -713,10 +705,10 @@ kerberos_v4(struct sockaddr_in *client, KTEXT pkt)
if ((i = check_princ(req_name_ptr, req_inst_ptr, 0,
&a_name_data, &k5key, 0, &ck5life))) {
- kerb_err_reply(client, pkt, i, "check_princ failed");
+ response = kerb_err_reply(client, pkt, i, "check_princ failed");
a_name_data.key_low = a_name_data.key_high = 0;
krb5_free_keyblock_contents(kdc_context, &k5key);
- return;
+ return response;
}
/* don't use k5key for client */
krb5_free_keyblock_contents(kdc_context, &k5key);
@@ -728,11 +720,11 @@ kerberos_v4(struct sockaddr_in *client, KTEXT pkt)
/* this does all the checking */
if ((i = check_princ(service, instance, lifetime,
&s_name_data, &k5key, 1, &sk5life))) {
- kerb_err_reply(client, pkt, i, "check_princ failed");
+ response = kerb_err_reply(client, pkt, i, "check_princ failed");
a_name_data.key_high = a_name_data.key_low = 0;
s_name_data.key_high = s_name_data.key_low = 0;
krb5_free_keyblock_contents(kdc_context, &k5key);
- return;
+ return response;
}
/* Bound requested lifetime with service and user */
v4req_end = krb_life_to_time(kerb_time.tv_sec, req_life);
@@ -803,8 +795,7 @@ kerberos_v4(struct sockaddr_in *client, KTEXT pkt)
rpkt = create_auth_reply(req_name_ptr, req_inst_ptr,
req_realm_ptr, req_time_ws, 0, a_name_data.exp_date,
a_name_data.key_version, ciph);
- krb4_sendto(f, (char *) rpkt->dat, rpkt->length, 0,
- (struct sockaddr *) client, S_AD_SZ);
+ response = make_response((char *) rpkt->dat, rpkt->length);
memset(&a_name_data, 0, sizeof(a_name_data));
memset(&s_name_data, 0, sizeof(s_name_data));
break;
@@ -830,9 +821,8 @@ kerberos_v4(struct sockaddr_in *client, KTEXT pkt)
lt = klog(L_KRB_PERR,
"APPL request with realm length too long from %s",
inet_ntoa(client_host));
- kerb_err_reply(client, pkt, RD_AP_INCON,
- "realm length too long");
- return;
+ return kerb_err_reply(client, pkt, RD_AP_INCON,
+ "realm length too long");
}
auth->length += (int) *(pkt->dat + auth->length) +
@@ -841,9 +831,8 @@ kerberos_v4(struct sockaddr_in *client, KTEXT pkt)
lt = klog(L_KRB_PERR,
"APPL request with funky tkt or req_id length from %s",
inet_ntoa(client_host));
- kerb_err_reply(client, pkt, RD_AP_INCON,
- "funky tkt or req_id length");
- return;
+ return kerb_err_reply(client, pkt, RD_AP_INCON,
+ "funky tkt or req_id length");
}
memcpy(auth->dat, pkt->dat, auth->length);
@@ -854,18 +843,16 @@ kerberos_v4(struct sockaddr_in *client, KTEXT pkt)
if ((!allow_v4_crossrealm)&&strcmp(tktrlm, local_realm) != 0) {
lt = klog(L_ERR_UNK,
"Cross realm ticket from %s denied by policy,", tktrlm);
- kerb_err_reply(client, pkt,
- KERB_ERR_PRINCIPAL_UNKNOWN, lt);
- return;
+ return kerb_err_reply(client, pkt,
+ KERB_ERR_PRINCIPAL_UNKNOWN, lt);
}
if (set_tgtkey(tktrlm, kvno, 0)) {
- lt = klog(L_ERR_UNK,
+ lt = klog(L_ERR_UNK,
"FAILED set_tgtkey realm %s, kvno %d. Host: %s ",
tktrlm, kvno, inet_ntoa(client_host));
/* no better error code */
- kerb_err_reply(client, pkt,
- KERB_ERR_PRINCIPAL_UNKNOWN, lt);
- return;
+ return kerb_err_reply(client, pkt,
+ KERB_ERR_PRINCIPAL_UNKNOWN, lt);
}
kerno = krb_rd_req(auth, "krbtgt", tktrlm, client_host.s_addr,
ad, 0);
@@ -875,9 +862,8 @@ kerberos_v4(struct sockaddr_in *client, KTEXT pkt)
"FAILED 3des set_tgtkey realm %s, kvno %d. Host: %s ",
tktrlm, kvno, inet_ntoa(client_host));
/* no better error code */
- kerb_err_reply(client, pkt,
- KERB_ERR_PRINCIPAL_UNKNOWN, lt);
- return;
+ return kerb_err_reply(client, pkt,
+ KERB_ERR_PRINCIPAL_UNKNOWN, lt);
}
kerno = krb_rd_req(auth, "krbtgt", tktrlm, client_host.s_addr,
ad, 0);
@@ -887,8 +873,7 @@ kerberos_v4(struct sockaddr_in *client, KTEXT pkt)
klog(L_ERR_UNK, "FAILED krb_rd_req from %s: %s",
inet_ntoa(client_host), krb_get_err_text(kerno));
req_name_ptr = req_inst_ptr = req_realm_ptr = "";
- kerb_err_reply(client, pkt, kerno, "krb_rd_req failed");
- return;
+ return kerb_err_reply(client, pkt, kerno, "krb_rd_req failed");
}
ptr = (char *) pkt->dat + auth->length;
@@ -910,22 +895,21 @@ kerberos_v4(struct sockaddr_in *client, KTEXT pkt)
req_realm_ptr = ad->prealm;
if (strcmp(ad->prealm, tktrlm)) {
- kerb_err_reply(client, pkt, KERB_ERR_PRINCIPAL_UNKNOWN,
- "Can't hop realms");
- return;
+ return kerb_err_reply(client, pkt, KERB_ERR_PRINCIPAL_UNKNOWN,
+ "Can't hop realms");
}
if (!strcmp(service, "changepw")) {
- kerb_err_reply(client, pkt, KERB_ERR_PRINCIPAL_UNKNOWN,
- "Can't authorize password changed based on TGT");
- return;
+ return kerb_err_reply(client, pkt, KERB_ERR_PRINCIPAL_UNKNOWN,
+ "Can't authorize password changed based on TGT");
}
kerno = check_princ(service, instance, req_life,
&s_name_data, &k5key, 1, &sk5life);
if (kerno) {
- kerb_err_reply(client, pkt, kerno, "check_princ failed");
+ response = kerb_err_reply(client, pkt, kerno,
+ "check_princ failed");
s_name_data.key_high = s_name_data.key_low = 0;
krb5_free_keyblock_contents(kdc_context, &k5key);
- return;
+ return response;
}
/* Bound requested lifetime with service and user */
v4endtime = krb_life_to_time((KRB4_32)ad->time_sec, ad->life);
@@ -981,8 +965,7 @@ kerberos_v4(struct sockaddr_in *client, KTEXT pkt)
rpkt = create_auth_reply(ad->pname, ad->pinst,
ad->prealm, time_ws,
0, 0, 0, ciph);
- krb4_sendto(f, (char *) rpkt->dat, rpkt->length, 0,
- (struct sockaddr *) client, S_AD_SZ);
+ response = make_response((char *) rpkt->dat, rpkt->length);
memset(&s_name_data, 0, sizeof(s_name_data));
break;
}
@@ -1007,6 +990,7 @@ kerberos_v4(struct sockaddr_in *client, KTEXT pkt)
break;
}
}
+ return response;
}
@@ -1016,7 +1000,7 @@ kerberos_v4(struct sockaddr_in *client, KTEXT pkt)
* client.
*/
-void
+static krb5_data *
kerb_err_reply(struct sockaddr_in *client, KTEXT pkt, long int err, char *string)
{
static KTEXT_ST e_pkt_st;
@@ -1027,9 +1011,7 @@ kerb_err_reply(struct sockaddr_in *client, KTEXT pkt, long int err, char *string
strncat(e_msg, string, sizeof(e_msg) - 1 - 19);
cr_err_reply(e_pkt, req_name_ptr, req_inst_ptr, req_realm_ptr,
req_time_ws, err, e_msg);
- krb4_sendto(f, (char *) e_pkt->dat, e_pkt->length, 0,
- (struct sockaddr *) client, S_AD_SZ);
-
+ return make_response((char *) e_pkt->dat, e_pkt->length);
}
static int
View
@@ -1,7 +1,7 @@
/*
* kdc/network.c
*
- * Copyright 1990,2000 by the Massachusetts Institute of Technology.
+ * Copyright 1990,2000,2007 by the Massachusetts Institute of Technology.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
@@ -747,6 +747,8 @@ static void process_packet(struct connection *conn, const char *prog,
com_err(prog, retval, "while dispatching (udp)");
return;
}
+ if (response == NULL)
+ return;
cc = sendto(port_fd, response->data, (socklen_t) response->length, 0,
(struct sockaddr *)&saddr, saddr_len);
if (cc == -1) {

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