From 97829843013e2f0d81b6ed61d155a04217e40205 Mon Sep 17 00:00:00 2001
From: Joseph Sutton <josephsutton@catalyst.net.nz>
Date: Wed, 1 Sep 2021 15:39:19 +1200
Subject: [PATCH 1/6] krb5pac.idl: Add ticket checksum PAC buffer type
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Isaac Boukris <iboukris@samba.org>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14881
(cherry picked from commit ff2f38fae79220e16765e17671972f9a55eb7cce)
---
librpc/idl/krb5pac.idl | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/librpc/idl/krb5pac.idl b/librpc/idl/krb5pac.idl
index fb360c1257f..3239d7656b6 100644
--- a/librpc/idl/krb5pac.idl
+++ b/librpc/idl/krb5pac.idl
@@ -112,7 +112,8 @@ interface krb5pac
PAC_TYPE_KDC_CHECKSUM = 7,
PAC_TYPE_LOGON_NAME = 10,
PAC_TYPE_CONSTRAINED_DELEGATION = 11,
- PAC_TYPE_UPN_DNS_INFO = 12
+ PAC_TYPE_UPN_DNS_INFO = 12,
+ PAC_TYPE_TICKET_CHECKSUM = 16
} PAC_TYPE;
typedef struct {
@@ -128,6 +129,7 @@ interface krb5pac
[case(PAC_TYPE_CONSTRAINED_DELEGATION)][subcontext(0xFFFFFC01)]
PAC_CONSTRAINED_DELEGATION_CTR constrained_delegation;
[case(PAC_TYPE_UPN_DNS_INFO)] PAC_UPN_DNS_INFO upn_dns_info;
+ [case(PAC_TYPE_TICKET_CHECKSUM)] PAC_SIGNATURE_DATA ticket_checksum;
/* when new PAC info types are added they are supposed to be done
in such a way that they are backwards compatible with existing
servers. This makes it safe to just use a [default] for
--
2.33.1
From 99cc0e06e5fe2776371b808432af39de00f76cdf Mon Sep 17 00:00:00 2001
From: Joseph Sutton <josephsutton@catalyst.net.nz>
Date: Wed, 1 Sep 2021 15:40:59 +1200
Subject: [PATCH 2/6] security.idl: Add well-known SIDs for FAST
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Isaac Boukris <iboukris@samba.org>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14881
(cherry picked from commit 0092b4a3ed58b2c256d4dd9117cce927a3edde12)
---
librpc/idl/security.idl | 3 +++
1 file changed, 3 insertions(+)
diff --git a/librpc/idl/security.idl b/librpc/idl/security.idl
index 06bf7449a70..3df96dedbdd 100644
--- a/librpc/idl/security.idl
+++ b/librpc/idl/security.idl
@@ -295,6 +295,9 @@ interface security
const string SID_AUTHENTICATION_AUTHORITY_ASSERTED_IDENTITY = "S-1-18-1";
const string SID_SERVICE_ASSERTED_IDENTITY = "S-1-18-2";
+ const string SID_COMPOUNDED_AUTHENTICATION = "S-1-5-21-0-0-0-496";
+ const string SID_CLAIMS_VALID = "S-1-5-21-0-0-0-497";
+
/*
* http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx
*/
--
2.33.1
From 693bcdb2f9b64af390d619c9b39293c581900151 Mon Sep 17 00:00:00 2001
From: Joseph Sutton <josephsutton@catalyst.net.nz>
Date: Wed, 29 Sep 2021 16:15:26 +1300
Subject: [PATCH 3/6] krb5pac.idl: Add missing buffer type values
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14642
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Backported-by: Andreas Schneider <asn@samba.org>
---
librpc/idl/krb5pac.idl | 3 +++
1 file changed, 3 insertions(+)
diff --git a/librpc/idl/krb5pac.idl b/librpc/idl/krb5pac.idl
index 3239d7656b6..515150ab9cd 100644
--- a/librpc/idl/krb5pac.idl
+++ b/librpc/idl/krb5pac.idl
@@ -113,6 +113,9 @@ interface krb5pac
PAC_TYPE_LOGON_NAME = 10,
PAC_TYPE_CONSTRAINED_DELEGATION = 11,
PAC_TYPE_UPN_DNS_INFO = 12,
+ PAC_TYPE_CLIENT_CLAIMS_INFO = 13,
+ PAC_TYPE_DEVICE_INFO = 14,
+ PAC_TYPE_DEVICE_CLAIMS_INFO = 15,
PAC_TYPE_TICKET_CHECKSUM = 16
} PAC_TYPE;
--
2.33.1
From 97323751c1b6b97e72eb80b8b99485d94696b30b Mon Sep 17 00:00:00 2001
From: Joseph Sutton <josephsutton@catalyst.net.nz>
Date: Tue, 26 Oct 2021 20:33:38 +1300
Subject: [PATCH 4/6] CVE-2020-25719 krb5pac.idl: Add PAC_ATTRIBUTES_INFO PAC
buffer type
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14561
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
---
librpc/idl/krb5pac.idl | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/librpc/idl/krb5pac.idl b/librpc/idl/krb5pac.idl
index 515150ab9cd..7a8d16464eb 100644
--- a/librpc/idl/krb5pac.idl
+++ b/librpc/idl/krb5pac.idl
@@ -97,6 +97,16 @@ interface krb5pac
PAC_UPN_DNS_FLAGS flags;
} PAC_UPN_DNS_INFO;
+ typedef [bitmap32bit] bitmap {
+ PAC_ATTRIBUTE_FLAG_PAC_WAS_REQUESTED = 0x00000001,
+ PAC_ATTRIBUTE_FLAG_PAC_WAS_GIVEN_IMPLICITLY = 0x00000002
+ } PAC_ATTRIBUTE_INFO_FLAGS;
+
+ typedef struct {
+ uint32 flags_length; /* length in bits */
+ PAC_ATTRIBUTE_INFO_FLAGS flags;
+ } PAC_ATTRIBUTES_INFO;
+
typedef [public] struct {
PAC_LOGON_INFO *info;
} PAC_LOGON_INFO_CTR;
@@ -116,7 +126,8 @@ interface krb5pac
PAC_TYPE_CLIENT_CLAIMS_INFO = 13,
PAC_TYPE_DEVICE_INFO = 14,
PAC_TYPE_DEVICE_CLAIMS_INFO = 15,
- PAC_TYPE_TICKET_CHECKSUM = 16
+ PAC_TYPE_TICKET_CHECKSUM = 16,
+ PAC_TYPE_ATTRIBUTES_INFO = 17
} PAC_TYPE;
typedef struct {
@@ -133,6 +144,7 @@ interface krb5pac
PAC_CONSTRAINED_DELEGATION_CTR constrained_delegation;
[case(PAC_TYPE_UPN_DNS_INFO)] PAC_UPN_DNS_INFO upn_dns_info;
[case(PAC_TYPE_TICKET_CHECKSUM)] PAC_SIGNATURE_DATA ticket_checksum;
+ [case(PAC_TYPE_ATTRIBUTES_INFO)] PAC_ATTRIBUTES_INFO attributes_info;
/* when new PAC info types are added they are supposed to be done
in such a way that they are backwards compatible with existing
servers. This makes it safe to just use a [default] for
--
2.33.1
From 9867beabf3b0be026d900e26ac91af655fb50cfe Mon Sep 17 00:00:00 2001
From: Joseph Sutton <josephsutton@catalyst.net.nz>
Date: Tue, 26 Oct 2021 20:33:49 +1300
Subject: [PATCH 5/6] CVE-2020-25719 krb5pac.idl: Add PAC_REQUESTER_SID PAC
buffer type
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14561
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
---
librpc/idl/krb5pac.idl | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/librpc/idl/krb5pac.idl b/librpc/idl/krb5pac.idl
index 7a8d16464eb..52fb40c4bbb 100644
--- a/librpc/idl/krb5pac.idl
+++ b/librpc/idl/krb5pac.idl
@@ -107,6 +107,10 @@ interface krb5pac
PAC_ATTRIBUTE_INFO_FLAGS flags;
} PAC_ATTRIBUTES_INFO;
+ typedef struct {
+ dom_sid sid;
+ } PAC_REQUESTER_SID;
+
typedef [public] struct {
PAC_LOGON_INFO *info;
} PAC_LOGON_INFO_CTR;
@@ -127,7 +131,8 @@ interface krb5pac
PAC_TYPE_DEVICE_INFO = 14,
PAC_TYPE_DEVICE_CLAIMS_INFO = 15,
PAC_TYPE_TICKET_CHECKSUM = 16,
- PAC_TYPE_ATTRIBUTES_INFO = 17
+ PAC_TYPE_ATTRIBUTES_INFO = 17,
+ PAC_TYPE_REQUESTER_SID = 18
} PAC_TYPE;
typedef struct {
@@ -145,6 +150,7 @@ interface krb5pac
[case(PAC_TYPE_UPN_DNS_INFO)] PAC_UPN_DNS_INFO upn_dns_info;
[case(PAC_TYPE_TICKET_CHECKSUM)] PAC_SIGNATURE_DATA ticket_checksum;
[case(PAC_TYPE_ATTRIBUTES_INFO)] PAC_ATTRIBUTES_INFO attributes_info;
+ [case(PAC_TYPE_REQUESTER_SID)] PAC_REQUESTER_SID requester_sid;
/* when new PAC info types are added they are supposed to be done
in such a way that they are backwards compatible with existing
servers. This makes it safe to just use a [default] for
--
2.33.1
From fb92457cfd11745be73660eb90519b625f6a5d97 Mon Sep 17 00:00:00 2001
From: Andrew Bartlett <abartlet@samba.org>
Date: Mon, 27 Sep 2021 11:20:19 +1300
Subject: [PATCH 6/6] CVE-2020-25721 krb5pac: Add new buffers for
samAccountName and objectSID
These appear when PAC_UPN_DNS_FLAG_HAS_SAM_NAME_AND_SID is set.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14835
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
---
librpc/idl/krb5pac.idl | 18 ++++++++++++++++--
librpc/ndr/ndr_krb5pac.c | 4 ++--
2 files changed, 18 insertions(+), 4 deletions(-)
diff --git a/librpc/idl/krb5pac.idl b/librpc/idl/krb5pac.idl
index 52fb40c4bbb..bbe4a253e3a 100644
--- a/librpc/idl/krb5pac.idl
+++ b/librpc/idl/krb5pac.idl
@@ -86,15 +86,29 @@ interface krb5pac
} PAC_CONSTRAINED_DELEGATION;
typedef [bitmap32bit] bitmap {
- PAC_UPN_DNS_FLAG_CONSTRUCTED = 0x00000001
+ PAC_UPN_DNS_FLAG_CONSTRUCTED = 0x00000001,
+ PAC_UPN_DNS_FLAG_HAS_SAM_NAME_AND_SID = 0x00000002
} PAC_UPN_DNS_FLAGS;
+ typedef struct {
+ [value(2*strlen_m(samaccountname))] uint16 samaccountname_size;
+ [relative_short,subcontext(0),subcontext_size(samaccountname_size),flag(NDR_ALIGN8|STR_NOTERM|NDR_REMAINING)] string *samaccountname;
+ [value(ndr_size_dom_sid(objectsid, ndr->flags))] uint16 objectsid_size;
+ [relative_short,subcontext(0),subcontext_size(objectsid_size)] dom_sid *objectsid;
+ } PAC_UPN_DNS_INFO_SAM_NAME_AND_SID;
+
+ typedef [nodiscriminant] union {
+ [case(PAC_UPN_DNS_FLAG_HAS_SAM_NAME_AND_SID)] PAC_UPN_DNS_INFO_SAM_NAME_AND_SID sam_name_and_sid;
+ [default];
+ } PAC_UPN_DNS_INFO_EX;
+
typedef struct {
[value(2*strlen_m(upn_name))] uint16 upn_name_size;
[relative_short,subcontext(0),subcontext_size(upn_name_size),flag(NDR_ALIGN8|STR_NOTERM|NDR_REMAINING)] string *upn_name;
[value(2*strlen_m(dns_domain_name))] uint16 dns_domain_name_size;
[relative_short,subcontext(0),subcontext_size(dns_domain_name_size),flag(NDR_ALIGN8|STR_NOTERM|NDR_REMAINING)] string *dns_domain_name;
PAC_UPN_DNS_FLAGS flags;
+ [switch_is(flags & PAC_UPN_DNS_FLAG_HAS_SAM_NAME_AND_SID)] PAC_UPN_DNS_INFO_EX ex;
} PAC_UPN_DNS_INFO;
typedef [bitmap32bit] bitmap {
@@ -160,7 +174,7 @@ interface krb5pac
typedef [public,nopush,nopull] struct {
PAC_TYPE type;
- [value(_ndr_size_PAC_INFO(info, type, 0))] uint32 _ndr_size;
+ [value(_ndr_size_PAC_INFO(info, type, LIBNDR_FLAG_ALIGN8))] uint32 _ndr_size;
/*
* We need to have two subcontexts to get the padding right,
* the outer subcontext uses NDR_ROUND(_ndr_size, 8), while
diff --git a/librpc/ndr/ndr_krb5pac.c b/librpc/ndr/ndr_krb5pac.c
index a9ae2c4a789..57b28df9e52 100644
--- a/librpc/ndr/ndr_krb5pac.c
+++ b/librpc/ndr/ndr_krb5pac.c
@@ -41,7 +41,7 @@ enum ndr_err_code ndr_push_PAC_BUFFER(struct ndr_push *ndr, int ndr_flags, const
if (ndr_flags & NDR_SCALARS) {
NDR_CHECK(ndr_push_align(ndr, 4));
NDR_CHECK(ndr_push_PAC_TYPE(ndr, NDR_SCALARS, r->type));
- NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, _ndr_size_PAC_INFO(r->info,r->type,0)));
+ NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, _ndr_size_PAC_INFO(r->info,r->type,LIBNDR_FLAG_ALIGN8)));
{
uint32_t _flags_save_PAC_INFO = ndr->flags;
ndr_set_flags(&ndr->flags, LIBNDR_FLAG_ALIGN8);
@@ -59,7 +59,7 @@ enum ndr_err_code ndr_push_PAC_BUFFER(struct ndr_push *ndr, int ndr_flags, const
{
struct ndr_push *_ndr_info_pad;
struct ndr_push *_ndr_info;
- size_t _ndr_size = _ndr_size_PAC_INFO(r->info, r->type, 0);
+ size_t _ndr_size = _ndr_size_PAC_INFO(r->info, r->type, LIBNDR_FLAG_ALIGN8);
NDR_CHECK(ndr_push_subcontext_start(ndr, &_ndr_info_pad, 0, NDR_ROUND(_ndr_size, 8)));
NDR_CHECK(ndr_push_subcontext_start(_ndr_info_pad, &_ndr_info, 0, _ndr_size));
NDR_CHECK(ndr_push_set_switch_value(_ndr_info, r->info, r->type));
--
2.33.1