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glibc: fix CVE-2017-18269 and CVE-2018-11236

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Backport two CVE patches from the upstream
https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=summary
commit 5460617d1567657621107d895ee2dd83bc1f88f2
commit cd66c0e584c6d692bc8347b5e72723d02b8a8ada

(From OE-Core rev: 398ac946745bbfad55deb382aeafec0be3298819)

Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Zhixiong Chi
2018-06-07 03:01:53 -07:00
committed by Richard Purdie
parent 15b3b32407
commit d2efd1f20e
3 changed files with 344 additions and 0 deletions
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178
meta/recipes-core/glibc/glibc/CVE-2017-18269.patch Normal file
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@@ -0,0 +1,178 @@
From cd66c0e584c6d692bc8347b5e72723d02b8a8ada Mon Sep 17 00:00:00 2001
From: Andrew Senkevich <andrew.n.senkevich@gmail.com>
Date: Fri, 23 Mar 2018 16:19:45 +0100
Subject: [PATCH] Fix i386 memmove issue (bug 22644).
[BZ #22644]
* sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S: Fixed
branch conditions.
* string/test-memmove.c (do_test2): New testcase.
Upstream-Status: Backport
CVE: CVE-2017-18269
Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com>
---
ChangeLog | 8 +++
string/test-memmove.c | 58 ++++++++++++++++++++++
.../i386/i686/multiarch/memcpy-sse2-unaligned.S | 12 ++---
3 files changed, 72 insertions(+), 6 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index 18ed09e..afdb766 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2018-03-23 Andrew Senkevich <andrew.senkevich@intel.com>
+ Max Horn <max@quendi.de>
+
+ [BZ #22644]
+ * sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S: Fixed
+ branch conditions.
+ * string/test-memmove.c (do_test2): New testcase.
+
2018-02-22 Andrew Waterman <andrew@sifive.com>
[BZ # 22884]
diff --git a/string/test-memmove.c b/string/test-memmove.c
index edc7a4c..64e3651 100644
--- a/string/test-memmove.c
+++ b/string/test-memmove.c
@@ -24,6 +24,7 @@
# define TEST_NAME "memmove"
#endif
#include "test-string.h"
+#include <support/test-driver.h>
char *simple_memmove (char *, const char *, size_t);
@@ -245,6 +246,60 @@ do_random_tests (void)
}
}
+static void
+do_test2 (void)
+{
+ size_t size = 0x20000000;
+ uint32_t * large_buf;
+
+ large_buf = mmap ((void*) 0x70000000, size, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANON, -1, 0);
+
+ if (large_buf == MAP_FAILED)
+ error (EXIT_UNSUPPORTED, errno, "Large mmap failed");
+
+ if ((uintptr_t) large_buf > 0x80000000 - 128
+ || 0x80000000 - (uintptr_t) large_buf > 0x20000000)
+ {
+ error (0, 0, "Large mmap allocated improperly");
+ ret = EXIT_UNSUPPORTED;
+ munmap ((void *) large_buf, size);
+ return;
+ }
+
+ size_t bytes_move = 0x80000000 - (uintptr_t) large_buf;
+ size_t arr_size = bytes_move / sizeof (uint32_t);
+ size_t i;
+
+ FOR_EACH_IMPL (impl, 0)
+ {
+ for (i = 0; i < arr_size; i++)
+ large_buf[i] = (uint32_t) i;
+
+ uint32_t * dst = &large_buf[33];
+
+#ifdef TEST_BCOPY
+ CALL (impl, (char *) large_buf, (char *) dst, bytes_move);
+#else
+ CALL (impl, (char *) dst, (char *) large_buf, bytes_move);
+#endif
+
+ for (i = 0; i < arr_size; i++)
+ {
+ if (dst[i] != (uint32_t) i)
+ {
+ error (0, 0,
+ "Wrong result in function %s dst \"%p\" src \"%p\" offset \"%zd\"",
+ impl->name, dst, large_buf, i);
+ ret = 1;
+ break;
+ }
+ }
+ }
+
+ munmap ((void *) large_buf, size);
+}
+
int
test_main (void)
{
@@ -284,6 +339,9 @@ test_main (void)
}
do_random_tests ();
+
+ do_test2 ();
+
return ret;
}
diff --git a/sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S b/sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S
index 9c3bbe7..9aa17de 100644
--- a/sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S
+++ b/sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S
@@ -72,7 +72,7 @@ ENTRY (MEMCPY)
cmp %edx, %eax
# ifdef USE_AS_MEMMOVE
- jg L(check_forward)
+ ja L(check_forward)
L(mm_len_0_or_more_backward):
/* Now do checks for lengths. We do [0..16], [16..32], [32..64], [64..128]
@@ -81,7 +81,7 @@ L(mm_len_0_or_more_backward):
jbe L(mm_len_0_16_bytes_backward)
cmpl $32, %ecx
- jg L(mm_len_32_or_more_backward)
+ ja L(mm_len_32_or_more_backward)
/* Copy [0..32] and return. */
movdqu (%eax), %xmm0
@@ -92,7 +92,7 @@ L(mm_len_0_or_more_backward):
L(mm_len_32_or_more_backward):
cmpl $64, %ecx
- jg L(mm_len_64_or_more_backward)
+ ja L(mm_len_64_or_more_backward)
/* Copy [0..64] and return. */
movdqu (%eax), %xmm0
@@ -107,7 +107,7 @@ L(mm_len_32_or_more_backward):
L(mm_len_64_or_more_backward):
cmpl $128, %ecx
- jg L(mm_len_128_or_more_backward)
+ ja L(mm_len_128_or_more_backward)
/* Copy [0..128] and return. */
movdqu (%eax), %xmm0
@@ -132,7 +132,7 @@ L(mm_len_128_or_more_backward):
add %ecx, %eax
cmp %edx, %eax
movl SRC(%esp), %eax
- jle L(forward)
+ jbe L(forward)
PUSH (%esi)
PUSH (%edi)
PUSH (%ebx)
@@ -269,7 +269,7 @@ L(check_forward):
add %edx, %ecx
cmp %eax, %ecx
movl LEN(%esp), %ecx
- jle L(forward)
+ jbe L(forward)
/* Now do checks for lengths. We do [0..16], [0..32], [0..64], [0..128]
separately. */
--
2.9.3

164
meta/recipes-core/glibc/glibc/CVE-2018-11236.patch Normal file
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@@ -0,0 +1,164 @@
From 5460617d1567657621107d895ee2dd83bc1f88f2 Mon Sep 17 00:00:00 2001
From: Paul Pluzhnikov <ppluzhnikov@google.com>
Date: Tue, 8 May 2018 18:12:41 -0700
Subject: [PATCH] Fix BZ 22786: integer addition overflow may cause stack
buffer overflow when realpath() input length is close to SSIZE_MAX.
2018-05-09 Paul Pluzhnikov <ppluzhnikov@google.com>
[BZ #22786]
* stdlib/canonicalize.c (__realpath): Fix overflow in path length
computation.
* stdlib/Makefile (test-bz22786): New test.
* stdlib/test-bz22786.c: New test.
CVE: CVE-2018-11236
Upstream-Status: Backport
Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com>
---
ChangeLog | 8 +++++
stdlib/Makefile | 2 +-
stdlib/canonicalize.c | 2 +-
stdlib/test-bz22786.c | 90 +++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 100 insertions(+), 2 deletions(-)
create mode 100644 stdlib/test-bz22786.c
diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2018-05-09 Paul Pluzhnikov <ppluzhnikov@google.com>
+
+ [BZ #22786]
+ * stdlib/canonicalize.c (__realpath): Fix overflow in path length
+ computation.
+ * stdlib/Makefile (test-bz22786): New test.
+ * stdlib/test-bz22786.c: New test.
+
2018-03-23 Andrew Senkevich <andrew.senkevich@intel.com>
Max Horn <max@quendi.de>
diff --git a/stdlib/Makefile b/stdlib/Makefile
index af1643c..1ddb1f9 100644
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -84,7 +84,7 @@ tests := tst-strtol tst-strtod testmb testrand testsort testdiv \
tst-cxa_atexit tst-on_exit test-atexit-race \
test-at_quick_exit-race test-cxa_atexit-race \
test-on_exit-race test-dlclose-exit-race \
- tst-makecontext-align
+ tst-makecontext-align test-bz22786
tests-internal := tst-strtod1i tst-strtod3 tst-strtod4 tst-strtod5i \
tst-tls-atexit tst-tls-atexit-nodelete
diff --git a/stdlib/canonicalize.c b/stdlib/canonicalize.c
index 4135f3f..390fb43 100644
--- a/stdlib/canonicalize.c
+++ b/stdlib/canonicalize.c
@@ -181,7 +181,7 @@ __realpath (const char *name, char *resolved)
extra_buf = __alloca (path_max);
len = strlen (end);
- if ((long int) (n + len) >= path_max)
+ if (path_max - n <= len)
{
__set_errno (ENAMETOOLONG);
goto error;
diff --git a/stdlib/test-bz22786.c b/stdlib/test-bz22786.c
new file mode 100644
index 0000000..e7837f9
--- /dev/null
+++ b/stdlib/test-bz22786.c
@@ -0,0 +1,90 @@
+/* Bug 22786: test for buffer overflow in realpath.
+ Copyright (C) 2018 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/>. */
+
+/* This file must be run from within a directory called "stdlib". */
+
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <support/test-driver.h>
+#include <libc-diag.h>
+
+static int
+do_test (void)
+{
+ const char dir[] = "bz22786";
+ const char lnk[] = "bz22786/symlink";
+
+ rmdir (dir);
+ if (mkdir (dir, 0755) != 0 && errno != EEXIST)
+ {
+ printf ("mkdir %s: %m\n", dir);
+ return EXIT_FAILURE;
+ }
+ if (symlink (".", lnk) != 0 && errno != EEXIST)
+ {
+ printf ("symlink (%s, %s): %m\n", dir, lnk);
+ return EXIT_FAILURE;
+ }
+
+ const size_t path_len = (size_t) INT_MAX + 1;
+
+ DIAG_PUSH_NEEDS_COMMENT;
+#if __GNUC_PREREQ (7, 0)
+ /* GCC 7 warns about too-large allocations; here we need such
+ allocation to succeed for the test to work. */
+ DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
+#endif
+ char *path = malloc (path_len);
+ DIAG_POP_NEEDS_COMMENT;
+
+ if (path == NULL)
+ {
+ printf ("malloc (%zu): %m\n", path_len);
+ return EXIT_UNSUPPORTED;
+ }
+
+ /* Construct very long path = "bz22786/symlink/aaaa....." */
+ char *p = mempcpy (path, lnk, sizeof (lnk) - 1);
+ *(p++) = '/';
+ memset (p, 'a', path_len - (path - p) - 2);
+ p[path_len - (path - p) - 1] = '\0';
+
+ /* This call crashes before the fix for bz22786 on 32-bit platforms. */
+ p = realpath (path, NULL);
+
+ if (p != NULL || errno != ENAMETOOLONG)
+ {
+ printf ("realpath: %s (%m)", p);
+ return EXIT_FAILURE;
+ }
+
+ /* Cleanup. */
+ unlink (lnk);
+ rmdir (dir);
+
+ return 0;
+}
+
+#define TEST_FUNCTION do_test
+#include <support/test-driver.c>
--
2.9.3

2
meta/recipes-core/glibc/glibc_2.27.bb
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@@ -44,6 +44,8 @@ SRC_URI = "${GLIBC_GIT_URI};branch=${SRCBRANCH};name=glibc \
file://0028-bits-siginfo-consts.h-enum-definition-for-TRAP_HWBKP.patch \
file://0029-Replace-strncpy-with-memccpy-to-fix-Wstringop-trunca.patch \
file://0030-plural_c_no_preprocessor_lines.patch \
file://CVE-2017-18269.patch \
file://CVE-2018-11236.patch \
"
NATIVESDKFIXES ?= ""