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glibc : Fix CVE-2022-23218

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Upstream-Status: Backport [https://sourceware.org/git/?p=glibc.git;a=commit;h=e368b12f6c16b6888dda99ba641e999b9c9643c8]
Upstream-Status: Backport
[https://sourceware.org/git/?p=glibc.git;a=commit;h=f545ad4928fa1f27a3075265182b38a4f939a5f7]

(From OE-Core rev: d2812267e8546a1152b2a60bf8ce90d458ec7d11)

Signed-off-by: pgowda <pgowda.cve@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 83fa93b5fdb10a589bad2a9fc83552df8f1dbf28)
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Sundeep KOKKONDA 2022-01-19 19:16:57 +05:30 committed by Richard Purdie
parent 9067e502b6
commit cdcd59474c
3 changed files with 306 additions and 0 deletions
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178
meta/recipes-core/glibc/glibc/0001-CVE-2022-23218.patch Normal file
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@ -0,0 +1,178 @@
From e368b12f6c16b6888dda99ba641e999b9c9643c8 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Mon, 17 Jan 2022 10:21:34 +0100
Subject: [PATCH] socket: Add the __sockaddr_un_set function
Upstream-Status: Backport [https://sourceware.org/git/?p=glibc.git;a=commit;h=e368b12f6c16b6888dda99ba641e999b9c9643c8]
CVE: CVE-2022-23219
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Signed-off-by: Pgowda <pgowda.cve@gmail.com>
---
include/sys/un.h | 12 +++++++
socket/Makefile | 6 +++-
socket/sockaddr_un_set.c | 41 ++++++++++++++++++++++++
socket/tst-sockaddr_un_set.c | 62 ++++++++++++++++++++++++++++++++++++
4 files changed, 120 insertions(+), 1 deletion(-)
create mode 100644 socket/sockaddr_un_set.c
create mode 100644 socket/tst-sockaddr_un_set.c
diff --git a/include/sys/un.h b/include/sys/un.h
index bdbee99980..152afd9fc7 100644
--- a/include/sys/un.h
+++ b/include/sys/un.h
@@ -1 +1,13 @@
#include <socket/sys/un.h>
+
+#ifndef _ISOMAC
+
+/* Set ADDR->sun_family to AF_UNIX and ADDR->sun_path to PATHNAME.
+ Return 0 on success or -1 on failure (due to overlong PATHNAME).
+ The caller should always use sizeof (struct sockaddr_un) as the
+ socket address length, disregaring the length of PATHNAME.
+ Only concrete (non-abstract) pathnames are supported. */
+int __sockaddr_un_set (struct sockaddr_un *addr, const char *pathname)
+ attribute_hidden;
+
+#endif /* _ISOMAC */
diff --git a/socket/Makefile b/socket/Makefile
index 39333e10ca..156eec6c85 100644
--- a/socket/Makefile
+++ b/socket/Makefile
@@ -29,13 +29,17 @@ headers := sys/socket.h sys/un.h bits/sockaddr.h bits/socket.h \
routines := accept bind connect getpeername getsockname getsockopt \
listen recv recvfrom recvmsg send sendmsg sendto \
setsockopt shutdown socket socketpair isfdtype opensock \
- sockatmark accept4 recvmmsg sendmmsg
+ sockatmark accept4 recvmmsg sendmmsg sockaddr_un_set
tests := \
tst-accept4 \
tst-sockopt \
# tests
+tests-internal := \
+ tst-sockaddr_un_set \
+ # tests-internal
+
tests-time64 := \
tst-sockopt-time64 \
# tests
diff --git a/socket/sockaddr_un_set.c b/socket/sockaddr_un_set.c
new file mode 100644
index 0000000000..0bd40dc34e
--- /dev/null
+++ b/socket/sockaddr_un_set.c
@@ -0,0 +1,41 @@
+/* Set the sun_path member of struct sockaddr_un.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+int
+__sockaddr_un_set (struct sockaddr_un *addr, const char *pathname)
+{
+ size_t name_length = strlen (pathname);
+
+ /* The kernel supports names of exactly sizeof (addr->sun_path)
+ bytes, without a null terminator, but userspace does not; see the
+ SUN_LEN macro. */
+ if (name_length >= sizeof (addr->sun_path))
+ {
+ __set_errno (EINVAL); /* Error code used by the kernel. */
+ return -1;
+ }
+
+ addr->sun_family = AF_UNIX;
+ memcpy (addr->sun_path, pathname, name_length + 1);
+ return 0;
+}
diff --git a/socket/tst-sockaddr_un_set.c b/socket/tst-sockaddr_un_set.c
new file mode 100644
index 0000000000..29c2a81afd
--- /dev/null
+++ b/socket/tst-sockaddr_un_set.c
@@ -0,0 +1,62 @@
+/* Test the __sockaddr_un_set function.
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+/* Re-compile the function because the version in libc is not
+ exported. */
+#include "sockaddr_un_set.c"
+
+#include <support/check.h>
+
+static int
+do_test (void)
+{
+ struct sockaddr_un sun;
+
+ memset (&sun, 0xcc, sizeof (sun));
+ __sockaddr_un_set (&sun, "");
+ TEST_COMPARE (sun.sun_family, AF_UNIX);
+ TEST_COMPARE (__sockaddr_un_set (&sun, ""), 0);
+
+ memset (&sun, 0xcc, sizeof (sun));
+ TEST_COMPARE (__sockaddr_un_set (&sun, "/example"), 0);
+ TEST_COMPARE_STRING (sun.sun_path, "/example");
+
+ {
+ char pathname[108]; /* Length of sun_path (ABI constant). */
+ memset (pathname, 'x', sizeof (pathname));
+ pathname[sizeof (pathname) - 1] = '\0';
+ memset (&sun, 0xcc, sizeof (sun));
+ TEST_COMPARE (__sockaddr_un_set (&sun, pathname), 0);
+ TEST_COMPARE (sun.sun_family, AF_UNIX);
+ TEST_COMPARE_STRING (sun.sun_path, pathname);
+ }
+
+ {
+ char pathname[109];
+ memset (pathname, 'x', sizeof (pathname));
+ pathname[sizeof (pathname) - 1] = '\0';
+ memset (&sun, 0xcc, sizeof (sun));
+ errno = 0;
+ TEST_COMPARE (__sockaddr_un_set (&sun, pathname), -1);
+ TEST_COMPARE (errno, EINVAL);
+ }
+
+ return 0;
+}
+
+#include <support/test-driver.c>
--
2.27.0

126
meta/recipes-core/glibc/glibc/0002-CVE-2022-23218.patch Normal file
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@ -0,0 +1,126 @@
From f545ad4928fa1f27a3075265182b38a4f939a5f7 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Mon, 17 Jan 2022 10:21:34 +0100
Subject: [PATCH] CVE-2022-23218: Buffer overflow in sunrpc svcunix_create (bug
28768)
The sunrpc function svcunix_create suffers from a stack-based buffer
overflow with overlong pathname arguments.
Upstream-Status: Backport [https://sourceware.org/git/?p=glibc.git;a=commit;h=f545ad4928fa1f27a3075265182b38a4f939a5f7]
CVE: CVE-2022-23218
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Signed-off-by: Pgowda <pgowda.cve@gmail.com>
---
NEWS | 3 +++
sunrpc/Makefile | 2 +-
sunrpc/svc_unix.c | 11 ++++-------
sunrpc/tst-bug28768.c | 42 ++++++++++++++++++++++++++++++++++++++++++
4 files changed, 50 insertions(+), 8 deletions(-)
create mode 100644 sunrpc/tst-bug28768.c
diff --git a/NEWS b/NEWS
index 38a9ddb2cf..38802f0673 100644
--- a/NEWS
+++ b/NEWS
@@ -203,6 +203,9 @@ Security related changes:
parameter number when processing the expansion resulting in a crash.
Reported by Philippe Antoine.
+ CVE-2022-23218: Passing an overlong file name to the svcunix_create
+ legacy function could result in a stack-based buffer overflow.
+
The following bugs are resolved with this release:
[4737] libc: fork is not async-signal-safe
diff --git a/sunrpc/Makefile b/sunrpc/Makefile
index 183ef3dc55..a79a7195fc 100644
--- a/sunrpc/Makefile
+++ b/sunrpc/Makefile
@@ -65,7 +65,7 @@ shared-only-routines = $(routines)
endif
tests = tst-xdrmem tst-xdrmem2 test-rpcent tst-udp-error tst-udp-timeout \
- tst-udp-nonblocking
+ tst-udp-nonblocking tst-bug28768
xtests := tst-getmyaddr
ifeq ($(have-thread-library),yes)
diff --git a/sunrpc/svc_unix.c b/sunrpc/svc_unix.c
index f2280b4c49..67177a2e78 100644
--- a/sunrpc/svc_unix.c
+++ b/sunrpc/svc_unix.c
@@ -154,7 +154,10 @@ svcunix_create (int sock, u_int sendsize
SVCXPRT *xprt;
struct unix_rendezvous *r;
struct sockaddr_un addr;
- socklen_t len = sizeof (struct sockaddr_in);
+ socklen_t len = sizeof (addr);
+
+ if (__sockaddr_un_set (&addr, path) < 0)
+ return NULL;
if (sock == RPC_ANYSOCK)
{
@@ -165,12 +168,6 @@ svcunix_create (int sock, u_int sendsize
}
madesock = TRUE;
}
- memset (&addr, '\0', sizeof (addr));
- addr.sun_family = AF_UNIX;
- len = strlen (path) + 1;
- memcpy (addr.sun_path, path, len);
- len += sizeof (addr.sun_family);
-
__bind (sock, (struct sockaddr *) &addr, len);
if (__getsockname (sock, (struct sockaddr *) &addr, &len) != 0
diff --git a/sunrpc/tst-bug28768.c b/sunrpc/tst-bug28768.c
new file mode 100644
index 0000000000..35a4b7b0b3
--- /dev/null
+++ b/sunrpc/tst-bug28768.c
@@ -0,0 +1,42 @@
+/* Test to verify that long path is rejected by svcunix_create (bug 28768).
+ Copyright (C) 2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <rpc/svc.h>
+#include <shlib-compat.h>
+#include <string.h>
+#include <support/check.h>
+
+/* svcunix_create does not have a default version in linkobj/libc.so. */
+compat_symbol_reference (libc, svcunix_create, svcunix_create, GLIBC_2_1);
+
+static int
+do_test (void)
+{
+ char pathname[109];
+ memset (pathname, 'x', sizeof (pathname));
+ pathname[sizeof (pathname) - 1] = '\0';
+
+ errno = 0;
+ TEST_VERIFY (svcunix_create (RPC_ANYSOCK, 4096, 4096, pathname) == NULL);
+ TEST_COMPARE (errno, EINVAL);
+
+ return 0;
+}
+
+#include <support/test-driver.c>

2
meta/recipes-core/glibc/glibc_2.34.bb
View File

@ -59,6 +59,8 @@ SRC_URI = "${GLIBC_GIT_URI};branch=${SRCBRANCH};name=glibc \
file://0002-CVE-2021-38604.patch \
file://0001-fix-create-thread-failed-in-unprivileged-process-BZ-.patch \
file://CVE-2021-43396.patch \
file://0001-CVE-2022-23218.patch \
file://0002-CVE-2022-23218.patch \
"
S = "${WORKDIR}/git"
B = "${WORKDIR}/build-${TARGET_SYS}"