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authorZheng Ruoqin <zhengrq.fnst@cn.fujitsu.com>2020-12-15 15:31:36 +0800
committerKhem Raj <raj.khem@gmail.com>2020-12-15 00:52:55 -0800
commit1d44b4c03d51e91ce01cf5fd0b33155ce36f1862 (patch)
treec5ead3b93a2a2a55266489b9398319867808570a
parentd259144422bb44af9dbc7397fc4077d0bf3fc83f (diff)
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samba: CVE-2020-14318 Security Advisory
References https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14318 Signed-off-by: Zheng Ruoqin <zhengrq.fnst@cn.fujitsu.com> Signed-off-by: Khem Raj <raj.khem@gmail.com>
-rw-r--r--meta-networking/recipes-connectivity/samba/samba/CVE-2020-14318.patch142
-rw-r--r--meta-networking/recipes-connectivity/samba/samba_4.10.18.bb1
2 files changed, 143 insertions, 0 deletions
diff --git a/meta-networking/recipes-connectivity/samba/samba/CVE-2020-14318.patch b/meta-networking/recipes-connectivity/samba/samba/CVE-2020-14318.patch
new file mode 100644
index 0000000000..ff1225db07
--- /dev/null
+++ b/meta-networking/recipes-connectivity/samba/samba/CVE-2020-14318.patch
@@ -0,0 +1,142 @@
+From ccf53dfdcd39f3526dbc2f20e1245674155380ff Mon Sep 17 00:00:00 2001
+From: Zheng Ruoqin <zhengrq.fnst@cn.fujitsu.com>
+Date: Fri, 11 Dec 2020 11:32:44 +0900
+Subject: [PATCH] s4: torture: Add smb2.notify.handle-permissions test.
+
+s3: smbd: Ensure change notifies can't get set unless the
+ directory handle is open for SEC_DIR_LIST.
+
+CVE-2020-14318
+
+BUG: https://bugzilla.samba.org/show_bug.cgi?id=14434
+
+Signed-off-by: Jeremy Allison <jra@samba.org>
+
+Signed-off-by: Zheng Ruoqin <zhengrq.fnst@cn.fujitsu.com>
+---
+ source3/smbd/notify.c | 8 ++++
+ source4/torture/smb2/notify.c | 82 ++++++++++++++++++++++++++++++++++-
+ 2 files changed, 89 insertions(+), 1 deletion(-)
+
+diff --git a/source3/smbd/notify.c b/source3/smbd/notify.c
+index 44c0b09..d23c03b 100644
+--- a/source3/smbd/notify.c
++++ b/source3/smbd/notify.c
+@@ -283,6 +283,14 @@ NTSTATUS change_notify_create(struct files_struct *fsp, uint32_t filter,
+ char fullpath[len+1];
+ NTSTATUS status = NT_STATUS_NOT_IMPLEMENTED;
+
++ /*
++ * Setting a changenotify needs READ/LIST access
++ * on the directory handle.
++ */
++ if (!(fsp->access_mask & SEC_DIR_LIST)) {
++ return NT_STATUS_ACCESS_DENIED;
++ }
++
+ if (fsp->notify != NULL) {
+ DEBUG(1, ("change_notify_create: fsp->notify != NULL, "
+ "fname = %s\n", fsp->fsp_name->base_name));
+diff --git a/source4/torture/smb2/notify.c b/source4/torture/smb2/notify.c
+index ebb4f8a..a5c9b94 100644
+--- a/source4/torture/smb2/notify.c
++++ b/source4/torture/smb2/notify.c
+@@ -2569,6 +2569,83 @@ done:
+ return ok;
+ }
+
++/*
++ Test asking for a change notify on a handle without permissions.
++*/
++
++#define BASEDIR_HPERM BASEDIR "_HPERM"
++
++static bool torture_smb2_notify_handle_permissions(
++ struct torture_context *torture,
++ struct smb2_tree *tree)
++{
++ bool ret = true;
++ NTSTATUS status;
++ union smb_notify notify;
++ union smb_open io;
++ struct smb2_handle h1 = {{0}};
++ struct smb2_request *req;
++
++ smb2_deltree(tree, BASEDIR_HPERM);
++ smb2_util_rmdir(tree, BASEDIR_HPERM);
++
++ torture_comment(torture,
++ "TESTING CHANGE NOTIFY "
++ "ON A HANDLE WITHOUT PERMISSIONS\n");
++
++ /*
++ get a handle on the directory
++ */
++ ZERO_STRUCT(io.smb2);
++ io.generic.level = RAW_OPEN_SMB2;
++ io.smb2.in.create_flags = 0;
++ io.smb2.in.desired_access = SEC_FILE_READ_ATTRIBUTE;
++ io.smb2.in.create_options = NTCREATEX_OPTIONS_DIRECTORY;
++ io.smb2.in.file_attributes = FILE_ATTRIBUTE_NORMAL;
++ io.smb2.in.share_access = NTCREATEX_SHARE_ACCESS_READ |
++ NTCREATEX_SHARE_ACCESS_WRITE;
++ io.smb2.in.alloc_size = 0;
++ io.smb2.in.create_disposition = NTCREATEX_DISP_CREATE;
++ io.smb2.in.impersonation_level = SMB2_IMPERSONATION_ANONYMOUS;
++ io.smb2.in.security_flags = 0;
++ io.smb2.in.fname = BASEDIR_HPERM;
++
++ status = smb2_create(tree, torture, &io.smb2);
++ CHECK_STATUS(status, NT_STATUS_OK);
++ h1 = io.smb2.out.file.handle;
++
++ /* ask for a change notify,
++ on file or directory name changes */
++ ZERO_STRUCT(notify.smb2);
++ notify.smb2.level = RAW_NOTIFY_SMB2;
++ notify.smb2.in.buffer_size = 1000;
++ notify.smb2.in.completion_filter = FILE_NOTIFY_CHANGE_NAME;
++ notify.smb2.in.file.handle = h1;
++ notify.smb2.in.recursive = true;
++
++ req = smb2_notify_send(tree, &notify.smb2);
++ torture_assert_goto(torture,
++ req != NULL,
++ ret,
++ done,
++ "smb2_notify_send failed\n");
++
++ /*
++ * Cancel it, we don't really want to wait.
++ */
++ smb2_cancel(req);
++ status = smb2_notify_recv(req, torture, &notify.smb2);
++ /* Handle h1 doesn't have permissions for ChangeNotify. */
++ CHECK_STATUS(status, NT_STATUS_ACCESS_DENIED);
++
++done:
++ if (!smb2_util_handle_empty(h1)) {
++ smb2_util_close(tree, h1);
++ }
++ smb2_deltree(tree, BASEDIR_HPERM);
++ return ret;
++}
++
+ /*
+ basic testing of SMB2 change notify
+ */
+@@ -2602,7 +2679,10 @@ struct torture_suite *torture_smb2_notify_init(TALLOC_CTX *ctx)
+ torture_smb2_notify_rmdir3);
+ torture_suite_add_2smb2_test(suite, "rmdir4",
+ torture_smb2_notify_rmdir4);
+-
++ torture_suite_add_1smb2_test(suite,
++ "handle-permissions",
++ torture_smb2_notify_handle_permissions);
++
+ suite->description = talloc_strdup(suite, "SMB2-NOTIFY tests");
+
+ return suite;
+--
+2.25.1
+
diff --git a/meta-networking/recipes-connectivity/samba/samba_4.10.18.bb b/meta-networking/recipes-connectivity/samba/samba_4.10.18.bb
index b5085c913b..923b2ddf16 100644
--- a/meta-networking/recipes-connectivity/samba/samba_4.10.18.bb
+++ b/meta-networking/recipes-connectivity/samba/samba_4.10.18.bb
@@ -28,6 +28,7 @@ SRC_URI = "${SAMBA_MIRROR}/stable/samba-${PV}.tar.gz \
file://0002-util_sec.c-Move-__thread-variable-to-global-scope.patch \
file://0001-Add-options-to-configure-the-use-of-libbsd.patch \
file://0001-nsswitch-nsstest.c-Avoid-nss-function-conflicts-with.patch \
+ file://CVE-2020-14318.patch \
"
SRC_URI_append_libc-musl = " \
file://samba-pam.patch \