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!221 fix CVE-2023-4091 CVE-2023-42669

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From: @yangl777 
Reviewed-by: @gebidelidaye 
Signed-off-by: @gebidelidaye
This commit is contained in:
openeuler-ci-bot 2023-10-17 03:13:15 +00:00 committed by Gitee
commit ebcb666fde
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4 changed files with 328 additions and 1 deletions
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179
backport-0001-CVE-2023-4091.patch Normal file
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@ -0,0 +1,179 @@
From b08a60160e6ab8d982d31844bcbf7ab67ff3a8de Mon Sep 17 00:00:00 2001
From: Ralph Boehme <slow@samba.org>
Date: Tue, 1 Aug 2023 12:30:00 +0200
Subject: [PATCH] CVE-2023-4091: smbtorture: test overwrite dispositions on
read-only file
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15439
Signed-off-by: Ralph Boehme <slow@samba.org>
Conflict: remove the modification of selftest/knownfail.d/samba3.smb2.acls
Reference: https://github.com/samba-team/samba/commit/b08a60160e6ab8d982d31844bcbf7ab67ff3a8de
---
source4/torture/smb2/acls.c | 143 ++++++++++++++++++++++++++
1 files changed, 143 insertions(+)
diff --git a/source4/torture/smb2/acls.c b/source4/torture/smb2/acls.c
index a27d4e079e67..5a892d004ea8 100644
--- a/source4/torture/smb2/acls.c
+++ b/source4/torture/smb2/acls.c
@@ -2989,6 +2989,148 @@ static bool test_mxac_not_granted(struct torture_context *tctx,
return ret;
}
+static bool test_overwrite_read_only_file(struct torture_context *tctx,
+ struct smb2_tree *tree)
+{
+ NTSTATUS status;
+ struct smb2_create c;
+ const char *fname = BASEDIR "\\test_overwrite_read_only_file.txt";
+ struct smb2_handle handle = {{0}};
+ union smb_fileinfo q;
+ union smb_setfileinfo set;
+ struct security_descriptor *sd = NULL, *sd_orig = NULL;
+ const char *owner_sid = NULL;
+ int i;
+ bool ret = true;
+
+ struct tcase {
+ int disposition;
+ const char *disposition_string;
+ NTSTATUS expected_status;
+ } tcases[] = {
+#define TCASE(d, s) { \
+ .disposition = d, \
+ .disposition_string = #d, \
+ .expected_status = s, \
+ }
+ TCASE(NTCREATEX_DISP_OPEN, NT_STATUS_OK),
+ TCASE(NTCREATEX_DISP_SUPERSEDE, NT_STATUS_ACCESS_DENIED),
+ TCASE(NTCREATEX_DISP_OVERWRITE, NT_STATUS_ACCESS_DENIED),
+ TCASE(NTCREATEX_DISP_OVERWRITE_IF, NT_STATUS_ACCESS_DENIED),
+ };
+#undef TCASE
+
+ ret = smb2_util_setup_dir(tctx, tree, BASEDIR);
+ torture_assert_goto(tctx, ret, ret, done, "smb2_util_setup_dir not ok");
+
+ c = (struct smb2_create) {
+ .in.desired_access = SEC_STD_READ_CONTROL |
+ SEC_STD_WRITE_DAC |
+ SEC_STD_WRITE_OWNER,
+ .in.file_attributes = FILE_ATTRIBUTE_NORMAL,
+ .in.share_access = NTCREATEX_SHARE_ACCESS_READ |
+ NTCREATEX_SHARE_ACCESS_WRITE,
+ .in.create_disposition = NTCREATEX_DISP_OPEN_IF,
+ .in.impersonation_level = NTCREATEX_IMPERSONATION_ANONYMOUS,
+ .in.fname = fname,
+ };
+
+ status = smb2_create(tree, tctx, &c);
+ torture_assert_ntstatus_ok_goto(tctx, status, ret, done,
+ "smb2_create failed\n");
+ handle = c.out.file.handle;
+
+ torture_comment(tctx, "get the original sd\n");
+
+ ZERO_STRUCT(q);
+ q.query_secdesc.level = RAW_FILEINFO_SEC_DESC;
+ q.query_secdesc.in.file.handle = handle;
+ q.query_secdesc.in.secinfo_flags = SECINFO_DACL | SECINFO_OWNER;
+
+ status = smb2_getinfo_file(tree, tctx, &q);
+ torture_assert_ntstatus_ok_goto(tctx, status, ret, done,
+ "smb2_getinfo_file failed\n");
+ sd_orig = q.query_secdesc.out.sd;
+
+ owner_sid = dom_sid_string(tctx, sd_orig->owner_sid);
+
+ sd = security_descriptor_dacl_create(tctx,
+ 0, NULL, NULL,
+ owner_sid,
+ SEC_ACE_TYPE_ACCESS_ALLOWED,
+ SEC_FILE_READ_DATA,
+ 0,
+ NULL);
+
+ ZERO_STRUCT(set);
+ set.set_secdesc.level = RAW_SFILEINFO_SEC_DESC;
+ set.set_secdesc.in.file.handle = handle;
+ set.set_secdesc.in.secinfo_flags = SECINFO_DACL;
+ set.set_secdesc.in.sd = sd;
+
+ status = smb2_setinfo_file(tree, &set);
+ torture_assert_ntstatus_ok_goto(tctx, status, ret, done,
+ "smb2_setinfo_file failed\n");
+
+ smb2_util_close(tree, handle);
+ ZERO_STRUCT(handle);
+
+ for (i = 0; i < ARRAY_SIZE(tcases); i++) {
+ torture_comment(tctx, "Verify open with %s dispostion\n",
+ tcases[i].disposition_string);
+
+ c = (struct smb2_create) {
+ .in.create_disposition = tcases[i].disposition,
+ .in.desired_access = SEC_FILE_READ_DATA,
+ .in.file_attributes = FILE_ATTRIBUTE_NORMAL,
+ .in.share_access = NTCREATEX_SHARE_ACCESS_MASK,
+ .in.impersonation_level = NTCREATEX_IMPERSONATION_ANONYMOUS,
+ .in.fname = fname,
+ };
+
+ status = smb2_create(tree, tctx, &c);
+ smb2_util_close(tree, c.out.file.handle);
+ torture_assert_ntstatus_equal_goto(
+ tctx, status, tcases[i].expected_status, ret, done,
+ "smb2_create failed\n");
+ };
+
+ torture_comment(tctx, "put back original sd\n");
+
+ c = (struct smb2_create) {
+ .in.desired_access = SEC_STD_WRITE_DAC,
+ .in.file_attributes = FILE_ATTRIBUTE_NORMAL,
+ .in.share_access = NTCREATEX_SHARE_ACCESS_MASK,
+ .in.create_disposition = NTCREATEX_DISP_OPEN_IF,
+ .in.impersonation_level = NTCREATEX_IMPERSONATION_ANONYMOUS,
+ .in.fname = fname,
+ };
+
+ status = smb2_create(tree, tctx, &c);
+ torture_assert_ntstatus_ok_goto(tctx, status, ret, done,
+ "smb2_create failed\n");
+ handle = c.out.file.handle;
+
+ ZERO_STRUCT(set);
+ set.set_secdesc.level = RAW_SFILEINFO_SEC_DESC;
+ set.set_secdesc.in.file.handle = handle;
+ set.set_secdesc.in.secinfo_flags = SECINFO_DACL;
+ set.set_secdesc.in.sd = sd_orig;
+
+ status = smb2_setinfo_file(tree, &set);
+ torture_assert_ntstatus_ok_goto(tctx, status, ret, done,
+ "smb2_setinfo_file failed\n");
+
+ smb2_util_close(tree, handle);
+ ZERO_STRUCT(handle);
+
+done:
+ smb2_util_close(tree, handle);
+ smb2_util_unlink(tree, fname);
+ smb2_deltree(tree, BASEDIR);
+ return ret;
+}
+
/*
basic testing of SMB2 ACLs
*/
@@ -3017,6 +3159,7 @@ struct torture_suite *torture_smb2_acls_init(TALLOC_CTX *ctx)
test_deny1);
torture_suite_add_1smb2_test(suite, "MXAC-NOT-GRANTED",
test_mxac_not_granted);
+ torture_suite_add_1smb2_test(suite, "OVERWRITE_READ_ONLY_FILE", test_overwrite_read_only_file);
suite->description = talloc_strdup(suite, "SMB2-ACLS tests");
--
2.41.0

47
backport-0002-CVE-2023-4091.patch Normal file
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@ -0,0 +1,47 @@
From 8b26f634372f11edcbea33dfd68a3d57889dfcc5 Mon Sep 17 00:00:00 2001
From: Ralph Boehme <slow@samba.org>
Date: Tue, 1 Aug 2023 13:04:36 +0200
Subject: [PATCH] CVE-2023-4091: smbd: use open_access_mask for access check in
open_file()
If the client requested FILE_OVERWRITE[_IF], we're implicitly adding
FILE_WRITE_DATA to the open_access_mask in open_file_ntcreate(), but for the
access check we're using access_mask which doesn't contain the additional
right, which means we can end up truncating a file for which the user has
only read-only access via an SD.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15439
Signed-off-by: Ralph Boehme <slow@samba.org>
Conflict: remove the modification of selftest/knownfail.d/samba3.smb2.acls and context adapt
Reference: https://github.com/samba-team/samba/commit/8b26f634372f11edcbea33dfd68a3d57889dfcc5
---
source3/smbd/open.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/source3/smbd/open.c b/source3/smbd/open.c
index 951c8a9..913ca09 100644
--- a/source3/smbd/open.c
+++ b/source3/smbd/open.c
@@ -1240,7 +1240,7 @@ static NTSTATUS open_file(files_struct *fsp,
status = smbd_check_access_rights(conn,
smb_fname,
false,
- access_mask);
+ open_access_mask);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("open_file: "
@@ -1381,7 +1381,7 @@ static NTSTATUS open_file(files_struct *fsp,
status = smbd_check_access_rights(conn,
smb_fname,
false,
- access_mask);
+ open_access_mask);
if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
(fsp->posix_flags & FSP_POSIX_FLAGS_OPEN) &&
--
2.33.0

92
backport-CVE-2023-42669.patch Normal file
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@ -0,0 +1,92 @@
From a16b210ec651b535b43c21574ca439238e2f8772 Mon Sep 17 00:00:00 2001
From: Andrew Bartlett <abartlet@samba.org>
Date: Tue, 12 Sep 2023 18:59:44 +1200
Subject: [PATCH] CVE-2023-42669 s4-rpc_server: Disable rpcecho server by
default
The rpcecho server is useful in development and testing, but should never
have been allowed into production, as it includes the facility to
do a blocking sleep() in the single-threaded rpc worker.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15474
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Conflict: NA
Reference: https://github.com/samba-team/samba/commit/a16b210ec651b535b43c21574ca439238e2f8772
---
docs-xml/smbdotconf/protocol/dcerpcendpointservers.xml | 2 +-
lib/param/loadparm.c | 2 +-
selftest/target/Samba4.pm | 2 +-
source3/param/loadparm.c | 2 +-
source4/rpc_server/wscript_build | 3 ++-
5 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/docs-xml/smbdotconf/protocol/dcerpcendpointservers.xml b/docs-xml/smbdotconf/protocol/dcerpcendpointservers.xml
index 8a217cc..c6642b7 100644
--- a/docs-xml/smbdotconf/protocol/dcerpcendpointservers.xml
+++ b/docs-xml/smbdotconf/protocol/dcerpcendpointservers.xml
@@ -6,6 +6,6 @@
<para>Specifies which DCE/RPC endpoint servers should be run.</para>
</description>
-<value type="default">epmapper, wkssvc, rpcecho, samr, netlogon, lsarpc, drsuapi, dssetup, unixinfo, browser, eventlog6, backupkey, dnsserver</value>
+<value type="default">epmapper, wkssvc, samr, netlogon, lsarpc, drsuapi, dssetup, unixinfo, browser, eventlog6, backupkey, dnsserver</value>
<value type="example">rpcecho</value>
</samba:parameter>
diff --git a/lib/param/loadparm.c b/lib/param/loadparm.c
index 890297d..a6cca16 100644
--- a/lib/param/loadparm.c
+++ b/lib/param/loadparm.c
@@ -2669,7 +2669,7 @@ struct loadparm_context *loadparm_init(TALLOC_CTX *mem_ctx)
lpcfg_do_global_parameter(lp_ctx, "ntvfs handler", "unixuid default");
lpcfg_do_global_parameter(lp_ctx, "max connections", "0");
- lpcfg_do_global_parameter(lp_ctx, "dcerpc endpoint servers", "epmapper wkssvc rpcecho samr netlogon lsarpc drsuapi dssetup unixinfo browser eventlog6 backupkey dnsserver");
+ lpcfg_do_global_parameter(lp_ctx, "dcerpc endpoint servers", "epmapper wkssvc samr netlogon lsarpc drsuapi dssetup unixinfo browser eventlog6 backupkey dnsserver");
lpcfg_do_global_parameter(lp_ctx, "server services", "s3fs rpc nbt wrepl ldap cldap kdc drepl winbindd ntp_signd kcc dnsupdate dns");
lpcfg_do_global_parameter(lp_ctx, "kccsrv:samba_kcc", "true");
/* the winbind method for domain controllers is for both RODC
diff --git a/selftest/target/Samba4.pm b/selftest/target/Samba4.pm
index a599099..fd292a5 100755
--- a/selftest/target/Samba4.pm
+++ b/selftest/target/Samba4.pm
@@ -785,7 +785,7 @@ sub provision_raw_step1($$)
wins support = yes
server role = $ctx->{server_role}
server services = +echo $services
- dcerpc endpoint servers = +winreg +srvsvc
+ dcerpc endpoint servers = +winreg +srvsvc +rpcecho
notify:inotify = false
ldb:nosync = true
ldap server require strong auth = yes
diff --git a/source3/param/loadparm.c b/source3/param/loadparm.c
index 2f486e9..9796cb0 100644
--- a/source3/param/loadparm.c
+++ b/source3/param/loadparm.c
@@ -879,7 +879,7 @@ static void init_globals(struct loadparm_context *lp_ctx, bool reinit_globals)
Globals.server_services = str_list_make_v3_const(NULL, "s3fs rpc nbt wrepl ldap cldap kdc drepl winbindd ntp_signd kcc dnsupdate dns", NULL);
- Globals.dcerpc_endpoint_servers = str_list_make_v3_const(NULL, "epmapper wkssvc rpcecho samr netlogon lsarpc drsuapi dssetup unixinfo browser eventlog6 backupkey dnsserver", NULL);
+ Globals.dcerpc_endpoint_servers = str_list_make_v3_const(NULL, "epmapper wkssvc samr netlogon lsarpc drsuapi dssetup unixinfo browser eventlog6 backupkey dnsserver", NULL);
Globals.tls_enabled = true;
Globals.tls_verify_peer = TLS_VERIFY_PEER_AS_STRICT_AS_POSSIBLE;
diff --git a/source4/rpc_server/wscript_build b/source4/rpc_server/wscript_build
index 1c741d2..b710bfa 100644
--- a/source4/rpc_server/wscript_build
+++ b/source4/rpc_server/wscript_build
@@ -29,7 +29,8 @@ bld.SAMBA_MODULE('dcerpc_rpcecho',
source='echo/rpc_echo.c',
subsystem='dcerpc_server',
init_function='dcerpc_server_rpcecho_init',
- deps='ndr-standard events'
+ deps='ndr-standard events',
+ enabled=bld.CONFIG_GET('ENABLE_SELFTEST')
)
--
2.33.0

11
samba.spec
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@ -49,7 +49,7 @@
Name: samba Name: samba
Version: 4.11.12 Version: 4.11.12
Release: 30 Release: 31
Summary: A suite for Linux to interoperate with Windows Summary: A suite for Linux to interoperate with Windows
License: GPLv3+ and LGPLv3+ License: GPLv3+ and LGPLv3+
@ -345,6 +345,9 @@ Patch6415: backport-0002-CVE-2022-2127.patch
Patch6416: backport-0003-CVE-2022-2127.patch Patch6416: backport-0003-CVE-2022-2127.patch
Patch6417: backport-CVE-2023-34966.patch Patch6417: backport-CVE-2023-34966.patch
Patch6418: backport-CVE-2023-34967.patch Patch6418: backport-CVE-2023-34967.patch
Patch6419: backport-0001-CVE-2023-4091.patch
Patch6420: backport-0002-CVE-2023-4091.patch
Patch6421: backport-CVE-2023-42669.patch
BuildRequires: avahi-devel cups-devel dbus-devel docbook-style-xsl e2fsprogs-devel gawk gnupg2 gnutls-devel >= 3.4.7 gpgme-devel BuildRequires: avahi-devel cups-devel dbus-devel docbook-style-xsl e2fsprogs-devel gawk gnupg2 gnutls-devel >= 3.4.7 gpgme-devel
@ -3403,6 +3406,12 @@ fi
%{_mandir}/man* %{_mandir}/man*
%changelog %changelog
* Mon Oct 16 2023 yanglu <yanglu72@h-partners.com> - 4.11.12-31
- Type:cves
- CVE:CVE-2023-4091 CVE-2023-42669
- SUG:NA
- DESC:fix CVE-2023-4091 CVE-2023-42669
* Mon Jul 24 2023 xinghe <xinghe2@h-partners.com> - 4.11.12-30 * Mon Jul 24 2023 xinghe <xinghe2@h-partners.com> - 4.11.12-30
- Type:cves - Type:cves
- CVE:CVE-2022-2127 CVE-2023-34966 CVE-2023-34967 - CVE:CVE-2022-2127 CVE-2023-34966 CVE-2023-34967