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f3bbd461fa
samba/samba-4-15-fix-winbind-refresh-tickets.patch
Andreas Schneider f3bbd461fa Fix winbind kerberos ticket refresh 
resolves: rhbz#2057500
2022-02-24 09:57:33 +01:00

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From a32bef9d1193e2bc253b7af8f4d0adb6476937f5 Mon Sep 17 00:00:00 2001
From: Samuel Cabrero <scabrero@suse.de>
Date: Tue, 22 Feb 2022 12:59:44 +0100
Subject: [PATCH 1/6] s3:libads: Fix memory leak in kerberos_return_pac() error
path
Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit 3dbcd20de98cd28683a9c248368e5082b6388111)
---
source3/libads/authdata.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/source3/libads/authdata.c b/source3/libads/authdata.c
index dd21d895fc2..c048510d480 100644
--- a/source3/libads/authdata.c
+++ b/source3/libads/authdata.c
@@ -61,7 +61,10 @@ NTSTATUS kerberos_return_pac(TALLOC_CTX *mem_ctx,
{
krb5_error_code ret;
NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
- DATA_BLOB tkt, tkt_wrapped, ap_rep, sesskey1;
+ DATA_BLOB tkt = data_blob_null;
+ DATA_BLOB tkt_wrapped = data_blob_null;
+ DATA_BLOB ap_rep = data_blob_null;
+ DATA_BLOB sesskey1 = data_blob_null;
const char *auth_princ = NULL;
const char *cc = "MEMORY:kerberos_return_pac";
struct auth_session_info *session_info;
@@ -81,7 +84,8 @@ NTSTATUS kerberos_return_pac(TALLOC_CTX *mem_ctx,
ZERO_STRUCT(sesskey1);
if (!name || !pass) {
- return NT_STATUS_INVALID_PARAMETER;
+ status = NT_STATUS_INVALID_PARAMETER;
+ goto out;
}
if (cache_name) {
@@ -131,7 +135,8 @@ NTSTATUS kerberos_return_pac(TALLOC_CTX *mem_ctx,
if (expire_time && renew_till_time &&
(*expire_time == 0) && (*renew_till_time == 0)) {
- return NT_STATUS_INVALID_LOGON_TYPE;
+ status = NT_STATUS_INVALID_LOGON_TYPE;
+ goto out;
}
ret = ads_krb5_cli_get_ticket(mem_ctx,
--
2.35.1
From d5a800beb60ee0b9310fa073c2e06a7dcbe65d5e Mon Sep 17 00:00:00 2001
From: Samuel Cabrero <scabrero@suse.de>
Date: Tue, 22 Feb 2022 13:00:05 +0100
Subject: [PATCH 2/6] lib:krb5_wrap: Improve debug message and use newer debug
macro
Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit ed14513be055cc56eb39785323df2c538a813865)
---
lib/krb5_wrap/krb5_samba.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/krb5_wrap/krb5_samba.c b/lib/krb5_wrap/krb5_samba.c
index fff5b4e2a22..42d4b950f80 100644
--- a/lib/krb5_wrap/krb5_samba.c
+++ b/lib/krb5_wrap/krb5_samba.c
@@ -1079,7 +1079,7 @@ krb5_error_code smb_krb5_renew_ticket(const char *ccache_string,
goto done;
}
- DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_string));
+ DBG_DEBUG("Using %s as ccache for '%s'\n", ccache_string, client_string);
/* FIXME: we should not fall back to defaults */
ret = krb5_cc_resolve(context, discard_const_p(char, ccache_string), &ccache);
--
2.35.1
From 79d08465f66df67b69fdafed8eec48290acf24b9 Mon Sep 17 00:00:00 2001
From: Samuel Cabrero <scabrero@suse.de>
Date: Tue, 22 Feb 2022 14:28:28 +0100
Subject: [PATCH 3/6] lib:krb5_wrap: Fix wrong debug message and use newer
debug macro
Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit 1b5b4107a5081f15ba215f3025056d509fcfcf2a)
---
lib/krb5_wrap/krb5_samba.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/lib/krb5_wrap/krb5_samba.c b/lib/krb5_wrap/krb5_samba.c
index 42d4b950f80..76c2dcd2126 100644
--- a/lib/krb5_wrap/krb5_samba.c
+++ b/lib/krb5_wrap/krb5_samba.c
@@ -1101,7 +1101,10 @@ krb5_error_code smb_krb5_renew_ticket(const char *ccache_string,
ret = krb5_get_renewed_creds(context, &creds, client, ccache, discard_const_p(char, service_string));
if (ret) {
- DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
+ DBG_DEBUG("krb5_get_renewed_creds using ccache '%s' "
+ "for client '%s' and service '%s' failed: %s\n",
+ ccache_string, client_string, service_string,
+ error_message(ret));
goto done;
}
--
2.35.1
From 00418e5b78fa4361c0386c13374154d310426f77 Mon Sep 17 00:00:00 2001
From: Samuel Cabrero <scabrero@suse.de>
Date: Tue, 22 Feb 2022 13:08:56 +0100
Subject: [PATCH 4/6] s3:libads: Return canonical principal and realm from
kerberos_return_pac()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14979
Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit 00b1f44a7e8f66976757535bcbc6bea97fb1c29f)
---
source3/libads/authdata.c | 22 +++++++++++++++++++++-
source3/libads/kerberos_proto.h | 2 ++
source3/utils/net_ads.c | 2 ++
source3/winbindd/winbindd_pam.c | 2 ++
4 files changed, 27 insertions(+), 1 deletion(-)
diff --git a/source3/libads/authdata.c b/source3/libads/authdata.c
index c048510d480..bf9a2335445 100644
--- a/source3/libads/authdata.c
+++ b/source3/libads/authdata.c
@@ -57,6 +57,8 @@ NTSTATUS kerberos_return_pac(TALLOC_CTX *mem_ctx,
time_t renewable_time,
const char *impersonate_princ_s,
const char *local_service,
+ char **_canon_principal,
+ char **_canon_realm,
struct PAC_DATA_CTR **_pac_data_ctr)
{
krb5_error_code ret;
@@ -75,6 +77,8 @@ NTSTATUS kerberos_return_pac(TALLOC_CTX *mem_ctx,
struct auth4_context *auth_context;
struct loadparm_context *lp_ctx;
struct PAC_DATA_CTR *pac_data_ctr = NULL;
+ char *canon_principal = NULL;
+ char *canon_realm = NULL;
TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
@@ -88,6 +92,14 @@ NTSTATUS kerberos_return_pac(TALLOC_CTX *mem_ctx,
goto out;
}
+ if (_canon_principal != NULL) {
+ *_canon_principal = NULL;
+ }
+
+ if (_canon_realm != NULL) {
+ *_canon_realm = NULL;
+ }
+
if (cache_name) {
cc = cache_name;
}
@@ -109,7 +121,9 @@ NTSTATUS kerberos_return_pac(TALLOC_CTX *mem_ctx,
request_pac,
add_netbios_addr,
renewable_time,
- NULL, NULL, NULL,
+ tmp_ctx,
+ &canon_principal,
+ &canon_realm,
&status);
if (ret) {
DEBUG(1,("kinit failed for '%s' with: %s (%d)\n",
@@ -243,6 +257,12 @@ NTSTATUS kerberos_return_pac(TALLOC_CTX *mem_ctx,
}
*_pac_data_ctr = talloc_move(mem_ctx, &pac_data_ctr);
+ if (_canon_principal != NULL) {
+ *_canon_principal = talloc_move(mem_ctx, &canon_principal);
+ }
+ if (_canon_realm != NULL) {
+ *_canon_realm = talloc_move(mem_ctx, &canon_realm);
+ }
out:
talloc_free(tmp_ctx);
diff --git a/source3/libads/kerberos_proto.h b/source3/libads/kerberos_proto.h
index 3d7b5bc074b..807381248c8 100644
--- a/source3/libads/kerberos_proto.h
+++ b/source3/libads/kerberos_proto.h
@@ -78,6 +78,8 @@ NTSTATUS kerberos_return_pac(TALLOC_CTX *mem_ctx,
time_t renewable_time,
const char *impersonate_princ_s,
const char *local_service,
+ char **_canon_principal,
+ char **_canon_realm,
struct PAC_DATA_CTR **pac_data_ctr);
/* The following definitions come from libads/krb5_setpw.c */
diff --git a/source3/utils/net_ads.c b/source3/utils/net_ads.c
index 8f993f9ba4c..c41fb0afe9c 100644
--- a/source3/utils/net_ads.c
+++ b/source3/utils/net_ads.c
@@ -3273,6 +3273,8 @@ static int net_ads_kerberos_pac_common(struct net_context *c, int argc, const ch
2592000, /* one month */
impersonate_princ_s,
local_service,
+ NULL,
+ NULL,
pac_data_ctr);
if (!NT_STATUS_IS_OK(status)) {
d_printf(_("failed to query kerberos PAC: %s\n"),
diff --git a/source3/winbindd/winbindd_pam.c b/source3/winbindd/winbindd_pam.c
index 7606bfb4ecd..025a5cbc111 100644
--- a/source3/winbindd/winbindd_pam.c
+++ b/source3/winbindd/winbindd_pam.c
@@ -789,6 +789,8 @@ static NTSTATUS winbindd_raw_kerberos_login(TALLOC_CTX *mem_ctx,
WINBINDD_PAM_AUTH_KRB5_RENEW_TIME,
NULL,
local_service,
+ NULL,
+ NULL,
&pac_data_ctr);
if (user_ccache_file != NULL) {
gain_root_privilege();
--
2.35.1
From d754753ab8edf6dde241d91442fe6afba8993de5 Mon Sep 17 00:00:00 2001
From: Samuel Cabrero <scabrero@suse.de>
Date: Tue, 22 Feb 2022 13:19:02 +0100
Subject: [PATCH 5/6] s3:winbind: Store canonical principal and realm in ccache
entry
They will be used later to refresh the tickets.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14979
Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit 0f4f330773d272b4d28ff3ba5a41bdd4ba569c8b)
---
source3/winbindd/winbindd.h | 2 ++
source3/winbindd/winbindd_cred_cache.c | 16 +++++++++++++++-
source3/winbindd/winbindd_pam.c | 14 ++++++++++----
source3/winbindd/winbindd_proto.h | 4 +++-
4 files changed, 30 insertions(+), 6 deletions(-)
diff --git a/source3/winbindd/winbindd.h b/source3/winbindd/winbindd.h
index a6b2238cec1..dac4a1fa927 100644
--- a/source3/winbindd/winbindd.h
+++ b/source3/winbindd/winbindd.h
@@ -344,6 +344,8 @@ struct WINBINDD_CCACHE_ENTRY {
const char *service;
const char *username;
const char *realm;
+ const char *canon_principal;
+ const char *canon_realm;
struct WINBINDD_MEMORY_CREDS *cred_ptr;
int ref_count;
uid_t uid;
diff --git a/source3/winbindd/winbindd_cred_cache.c b/source3/winbindd/winbindd_cred_cache.c
index c3077e21989..88847b1ab97 100644
--- a/source3/winbindd/winbindd_cred_cache.c
+++ b/source3/winbindd/winbindd_cred_cache.c
@@ -501,7 +501,9 @@ NTSTATUS add_ccache_to_list(const char *princ_name,
time_t create_time,
time_t ticket_end,
time_t renew_until,
- bool postponed_request)
+ bool postponed_request,
+ const char *canon_principal,
+ const char *canon_realm)
{
struct WINBINDD_CCACHE_ENTRY *entry = NULL;
struct timeval t;
@@ -617,6 +619,18 @@ NTSTATUS add_ccache_to_list(const char *princ_name,
goto no_mem;
}
}
+ if (canon_principal != NULL) {
+ entry->canon_principal = talloc_strdup(entry, canon_principal);
+ if (entry->canon_principal == NULL) {
+ goto no_mem;
+ }
+ }
+ if (canon_realm != NULL) {
+ entry->canon_realm = talloc_strdup(entry, canon_realm);
+ if (entry->canon_realm == NULL) {
+ goto no_mem;
+ }
+ }
entry->ccname = talloc_strdup(entry, ccname);
if (!entry->ccname) {
diff --git a/source3/winbindd/winbindd_pam.c b/source3/winbindd/winbindd_pam.c
index 025a5cbc111..a24cef78440 100644
--- a/source3/winbindd/winbindd_pam.c
+++ b/source3/winbindd/winbindd_pam.c
@@ -687,6 +687,8 @@ static NTSTATUS winbindd_raw_kerberos_login(TALLOC_CTX *mem_ctx,
const char *local_service;
uint32_t i;
struct netr_SamInfo6 *info6_copy = NULL;
+ char *canon_principal = NULL;
+ char *canon_realm = NULL;
bool ok;
*info6 = NULL;
@@ -789,8 +791,8 @@ static NTSTATUS winbindd_raw_kerberos_login(TALLOC_CTX *mem_ctx,
WINBINDD_PAM_AUTH_KRB5_RENEW_TIME,
NULL,
local_service,
- NULL,
- NULL,
+ &canon_principal,
+ &canon_realm,
&pac_data_ctr);
if (user_ccache_file != NULL) {
gain_root_privilege();
@@ -856,7 +858,9 @@ static NTSTATUS winbindd_raw_kerberos_login(TALLOC_CTX *mem_ctx,
time(NULL),
ticket_lifetime,
renewal_until,
- false);
+ false,
+ canon_principal,
+ canon_realm);
if (!NT_STATUS_IS_OK(result)) {
DEBUG(10,("winbindd_raw_kerberos_login: failed to add ccache to list: %s\n",
@@ -1233,7 +1237,9 @@ static NTSTATUS winbindd_dual_pam_auth_cached(struct winbindd_domain *domain,
time(NULL),
time(NULL) + lp_winbind_cache_time(),
time(NULL) + WINBINDD_PAM_AUTH_KRB5_RENEW_TIME,
- true);
+ true,
+ principal_s,
+ realm);
if (!NT_STATUS_IS_OK(result)) {
DEBUG(10,("winbindd_dual_pam_auth_cached: failed "
diff --git a/source3/winbindd/winbindd_proto.h b/source3/winbindd/winbindd_proto.h
index c0d653a6d77..16c23f3de40 100644
--- a/source3/winbindd/winbindd_proto.h
+++ b/source3/winbindd/winbindd_proto.h
@@ -236,7 +236,9 @@ NTSTATUS add_ccache_to_list(const char *princ_name,
time_t create_time,
time_t ticket_end,
time_t renew_until,
- bool postponed_request);
+ bool postponed_request,
+ const char *canon_principal,
+ const char *canon_realm);
NTSTATUS remove_ccache(const char *username);
struct WINBINDD_MEMORY_CREDS *find_memory_creds_by_name(const char *username);
NTSTATUS winbindd_add_memory_creds(const char *username,
--
2.35.1
From 82452eb54758de50700776fb92b7e7af892fdaea Mon Sep 17 00:00:00 2001
From: Samuel Cabrero <scabrero@suse.de>
Date: Tue, 22 Feb 2022 14:28:44 +0100
Subject: [PATCH 6/6] s3:winbind: Use the canonical principal name to renew the
credentials
The principal name stored in the winbindd ccache entry might be an
enterprise principal name if enterprise principals are enabled. Use
the canonical name to renew the credentials.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14979
Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit 8246ccc23d064147412bb3475e6431a9fffc0d27)
---
source3/winbindd/winbindd_cred_cache.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/source3/winbindd/winbindd_cred_cache.c b/source3/winbindd/winbindd_cred_cache.c
index 88847b1ab97..6c65db6a73f 100644
--- a/source3/winbindd/winbindd_cred_cache.c
+++ b/source3/winbindd/winbindd_cred_cache.c
@@ -209,7 +209,7 @@ rekinit:
set_effective_uid(entry->uid);
ret = smb_krb5_renew_ticket(entry->ccname,
- entry->principal_name,
+ entry->canon_principal,
entry->service,
&new_start);
#if defined(DEBUG_KRB5_TKT_RENEWAL)
--
2.35.1
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