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glibc: fix CVE-2016-1234, CVE-2016-3075, CVE-2016-5417

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Only relevant for krogoth since version 2.24+ (master, morty) is not affected.

(From OE-Core rev: 88be4b40bacc7c8a08fb76fc220f491deb2c1c3a)

Signed-off-by: Pascal Bach <pascal.bach@siemens.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Pascal Bach 2016-10-14 14:26:44 +02:00 committed by Richard Purdie
parent 40f4a6d075
commit 732dd581f3
4 changed files with 495 additions and 0 deletions
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427
meta/recipes-core/glibc/glibc/CVE-2016-1234.patch Normal file
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@ -0,0 +1,427 @@
glibc-2.23: Fix CVE-2016-1234
[No upstream tracking] -- https://bugzilla.redhat.com/show_bug.cgi?id=1315647
glob: Do not copy d_name field of struct dirent
Instead, we store the data we need from the return value of
readdir in an object of the new type struct readdir_result.
This type is independent of the layout of struct dirent.
Upstream-Status: Backport
CVE: CVE-2016-1234
Signed-off-by: Andrej Valek <andrej.valek@siemens.com>
Signed-off-by: Pascal Bach <pascal.bach@siemens.com>
diff --git a/posix/bug-glob2.c b/posix/bug-glob2.c
index ddf5ec9..22ea35f 100644
--- a/posix/bug-glob2.c
+++ b/posix/bug-glob2.c
@@ -40,6 +40,17 @@
# define PRINTF(fmt, args...)
#endif
+#define LONG_NAME \
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
static struct
{
@@ -58,6 +69,7 @@ static struct
{ ".", 3, DT_DIR, 0755 },
{ "..", 3, DT_DIR, 0755 },
{ "a", 3, DT_REG, 0644 },
+ { LONG_NAME, 3, DT_REG, 0644 },
{ "unreadable", 2, DT_DIR, 0111 },
{ ".", 3, DT_DIR, 0111 },
{ "..", 3, DT_DIR, 0755 },
@@ -75,7 +87,7 @@ typedef struct
int level;
int idx;
struct dirent d;
- char room_for_dirent[NAME_MAX];
+ char room_for_dirent[sizeof (LONG_NAME)];
} my_DIR;
@@ -193,7 +205,7 @@ my_readdir (void *gdir)
return NULL;
}
- dir->d.d_ino = dir->idx;
+ dir->d.d_ino = 1; /* glob should not skip this entry. */
#ifdef _DIRENT_HAVE_D_TYPE
dir->d.d_type = filesystem[dir->idx].type;
diff --git a/posix/glob.c b/posix/glob.c
index 0c04c3c..6c6612d 100644
--- a/posix/glob.c
+++ b/posix/glob.c
@@ -24,7 +24,9 @@
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <stdbool.h>
#include <stddef.h>
+#include <stdint.h>
/* Outcomment the following line for production quality code. */
/* #define NDEBUG 1 */
@@ -57,10 +59,8 @@
#if defined HAVE_DIRENT_H || defined __GNU_LIBRARY__
# include <dirent.h>
-# define NAMLEN(dirent) strlen((dirent)->d_name)
#else
# define dirent direct
-# define NAMLEN(dirent) (dirent)->d_namlen
# ifdef HAVE_SYS_NDIR_H
# include <sys/ndir.h>
# endif
@@ -75,82 +75,8 @@
# endif /* HAVE_VMSDIR_H */
#endif
-
-/* In GNU systems, <dirent.h> defines this macro for us. */
-#ifdef _D_NAMLEN
-# undef NAMLEN
-# define NAMLEN(d) _D_NAMLEN(d)
-#endif
-
-/* When used in the GNU libc the symbol _DIRENT_HAVE_D_TYPE is available
- if the `d_type' member for `struct dirent' is available.
- HAVE_STRUCT_DIRENT_D_TYPE plays the same role in GNULIB. */
-#if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE
-/* True if the directory entry D must be of type T. */
-# define DIRENT_MUST_BE(d, t) ((d)->d_type == (t))
-
-/* True if the directory entry D might be a symbolic link. */
-# define DIRENT_MIGHT_BE_SYMLINK(d) \
- ((d)->d_type == DT_UNKNOWN || (d)->d_type == DT_LNK)
-
-/* True if the directory entry D might be a directory. */
-# define DIRENT_MIGHT_BE_DIR(d) \
- ((d)->d_type == DT_DIR || DIRENT_MIGHT_BE_SYMLINK (d))
-
-#else /* !HAVE_D_TYPE */
-# define DIRENT_MUST_BE(d, t) false
-# define DIRENT_MIGHT_BE_SYMLINK(d) true
-# define DIRENT_MIGHT_BE_DIR(d) true
-#endif /* HAVE_D_TYPE */
-
-/* If the system has the `struct dirent64' type we use it internally. */
-#if defined _LIBC && !defined COMPILE_GLOB64
-# if defined HAVE_DIRENT_H || defined __GNU_LIBRARY__
-# define CONVERT_D_NAMLEN(d64, d32)
-# else
-# define CONVERT_D_NAMLEN(d64, d32) \
- (d64)->d_namlen = (d32)->d_namlen;
-# endif
-
-# if (defined POSIX || defined WINDOWS32) && !defined __GNU_LIBRARY__
-# define CONVERT_D_INO(d64, d32)
-# else
-# define CONVERT_D_INO(d64, d32) \
- (d64)->d_ino = (d32)->d_ino;
-# endif
-
-# ifdef _DIRENT_HAVE_D_TYPE
-# define CONVERT_D_TYPE(d64, d32) \
- (d64)->d_type = (d32)->d_type;
-# else
-# define CONVERT_D_TYPE(d64, d32)
-# endif
-
-# define CONVERT_DIRENT_DIRENT64(d64, d32) \
- memcpy ((d64)->d_name, (d32)->d_name, NAMLEN (d32) + 1); \
- CONVERT_D_NAMLEN (d64, d32) \
- CONVERT_D_INO (d64, d32) \
- CONVERT_D_TYPE (d64, d32)
-#endif
-
-
-#if (defined POSIX || defined WINDOWS32) && !defined __GNU_LIBRARY__
-/* Posix does not require that the d_ino field be present, and some
- systems do not provide it. */
-# define REAL_DIR_ENTRY(dp) 1
-#else
-# define REAL_DIR_ENTRY(dp) (dp->d_ino != 0)
-#endif /* POSIX */
-
#include <stdlib.h>
#include <string.h>
-
-/* NAME_MAX is usually defined in <dirent.h> or <limits.h>. */
-#include <limits.h>
-#ifndef NAME_MAX
-# define NAME_MAX (sizeof (((struct dirent *) 0)->d_name))
-#endif
-
#include <alloca.h>
#ifdef _LIBC
@@ -195,8 +121,111 @@
static const char *next_brace_sub (const char *begin, int flags) __THROWNL;
+/* A representation of a directory entry which does not depend on the
+ layout of struct dirent, or the size of ino_t. */
+struct readdir_result
+{
+ const char *name;
+# if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE
+ uint8_t type;
+# endif
+ bool skip_entry;
+};
+
+# if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE
+/* Initializer based on the d_type member of struct dirent. */
+# define D_TYPE_TO_RESULT(source) (source)->d_type,
+
+/* True if the directory entry D might be a symbolic link. */
+static bool
+readdir_result_might_be_symlink (struct readdir_result d)
+{
+ return d.type == DT_UNKNOWN || d.type == DT_LNK;
+}
+
+/* True if the directory entry D might be a directory. */
+static bool
+readdir_result_might_be_dir (struct readdir_result d)
+{
+ return d.type == DT_DIR || readdir_result_might_be_symlink (d);
+}
+# else /* defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE */
+# define D_TYPE_TO_RESULT(source)
+
+/* If we do not have type information, symbolic links and directories
+ are always a possibility. */
+
+static bool
+readdir_result_might_be_symlink (struct readdir_result d)
+{
+ return true;
+}
+
+static bool
+eaddir_result_might_be_dir (struct readdir_result d)
+{
+ return true;
+}
+
+# endif /* defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE */
+
+# if (defined POSIX || defined WINDOWS32) && !defined __GNU_LIBRARY__
+/* Initializer for skip_entry. POSIX does not require that the d_ino
+ field be present, and some systems do not provide it. */
+# define D_INO_TO_RESULT(source) false,
+# else
+# define D_INO_TO_RESULT(source) (source)->d_ino == 0,
+# endif
+
+/* Construct an initializer for a struct readdir_result object from a
+ struct dirent *. No copy of the name is made. */
+#define READDIR_RESULT_INITIALIZER(source) \
+ { \
+ source->d_name, \
+ D_TYPE_TO_RESULT (source) \
+ D_INO_TO_RESULT (source) \
+ }
+
#endif /* !defined _LIBC || !defined GLOB_ONLY_P */
+/* Call gl_readdir on STREAM. This macro can be overridden to reduce
+ type safety if an old interface version needs to be supported. */
+#ifndef GL_READDIR
+# define GL_READDIR(pglob, stream) ((pglob)->gl_readdir (stream))
+#endif
+
+/* Extract name and type from directory entry. No copy of the name is
+ made. If SOURCE is NULL, result name is NULL. Keep in sync with
+ convert_dirent64 below. */
+static struct readdir_result
+convert_dirent (const struct dirent *source)
+{
+ if (source == NULL)
+ {
+ struct readdir_result result = { NULL, };
+ return result;
+ }
+ struct readdir_result result = READDIR_RESULT_INITIALIZER (source);
+ return result;
+}
+
+#ifndef COMPILE_GLOB64
+/* Like convert_dirent, but works on struct dirent64 instead. Keep in
+ sync with convert_dirent above. */
+static struct readdir_result
+convert_dirent64 (const struct dirent64 *source)
+{
+ if (source == NULL)
+ {
+ struct readdir_result result = { NULL, };
+ return result;
+ }
+ struct readdir_result result = READDIR_RESULT_INITIALIZER (source);
+ return result;
+}
+#endif
+
+
#ifndef attribute_hidden
# define attribute_hidden
#endif
@@ -1553,56 +1582,36 @@ glob_in_dir (const char *pattern, const char *directory, int flags,
while (1)
{
- const char *name;
- size_t len;
-#if defined _LIBC && !defined COMPILE_GLOB64
- struct dirent64 *d;
- union
- {
- struct dirent64 d64;
- char room [offsetof (struct dirent64, d_name[0])
- + NAME_MAX + 1];
- }
- d64buf;
-
- if (__glibc_unlikely (flags & GLOB_ALTDIRFUNC))
+ struct readdir_result d;
{
- struct dirent *d32 = (*pglob->gl_readdir) (stream);
- if (d32 != NULL)
- {
- CONVERT_DIRENT_DIRENT64 (&d64buf.d64, d32);
- d = &d64buf.d64;
- }
+ if (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0))
+ d = convert_dirent (GL_READDIR (pglob, stream));
else
- d = NULL;
- }
- else
- d = __readdir64 (stream);
+ {
+#ifdef COMPILE_GLOB64
+ d = convert_dirent (__readdir (stream));
#else
- struct dirent *d = (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)
- ? ((struct dirent *)
- (*pglob->gl_readdir) (stream))
- : __readdir (stream));
+ d = convert_dirent64 (__readdir64 (stream));
#endif
- if (d == NULL)
+ }
+ }
+ if (d.name == NULL)
break;
- if (! REAL_DIR_ENTRY (d))
+ if (d.skip_entry)
continue;
/* If we shall match only directories use the information
provided by the dirent call if possible. */
- if ((flags & GLOB_ONLYDIR) && !DIRENT_MIGHT_BE_DIR (d))
+ if ((flags & GLOB_ONLYDIR) && !readdir_result_might_be_dir (d))
continue;
- name = d->d_name;
-
- if (fnmatch (pattern, name, fnm_flags) == 0)
+ if (fnmatch (pattern, d.name, fnm_flags) == 0)
{
/* If the file we found is a symlink we have to
make sure the target file exists. */
- if (!DIRENT_MIGHT_BE_SYMLINK (d)
- || link_exists_p (dfd, directory, dirlen, name, pglob,
- flags))
+ if (!readdir_result_might_be_symlink (d)
+ || link_exists_p (dfd, directory, dirlen, d.name,
+ pglob, flags))
{
if (cur == names->count)
{
@@ -1622,12 +1631,10 @@ glob_in_dir (const char *pattern, const char *directory, int flags,
names = newnames;
cur = 0;
}
- len = NAMLEN (d);
- names->name[cur] = (char *) malloc (len + 1);
+ names->name[cur] = strdup (d.name);
if (names->name[cur] == NULL)
- goto memory_error;
- *((char *) mempcpy (names->name[cur++], name, len))
- = '\0';
+ goto memory_error;
+ ++cur;
++nfound;
}
}
diff --git a/posix/tst-gnuglob.c b/posix/tst-gnuglob.c
index 992b997..3a27a06 100644
--- a/posix/tst-gnuglob.c
+++ b/posix/tst-gnuglob.c
@@ -211,7 +211,7 @@ my_readdir (void *gdir)
return NULL;
}
- dir->d.d_ino = dir->idx;
+ dir->d.d_ino = 1; /* glob should not skip this entry. */
#ifdef _DIRENT_HAVE_D_TYPE
dir->d.d_type = filesystem[dir->idx].type;
diff --git a/sysdeps/unix/sysv/linux/i386/glob64.c b/sysdeps/unix/sysv/linux/i386/glob64.c
index b4fcd1a..4a2dfc1 100644
--- a/sysdeps/unix/sysv/linux/i386/glob64.c
+++ b/sysdeps/unix/sysv/linux/i386/glob64.c
@@ -1,3 +1,21 @@
+/* Two glob variants with 64-bit support, for dirent64 and __olddirent64.
+ Copyright (C) 1998-2016 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 <dirent.h>
#include <glob.h>
#include <sys/stat.h>
@@ -38,11 +56,15 @@ int __old_glob64 (const char *__pattern, int __flags,
#undef dirent
#define dirent __old_dirent64
+#undef GL_READDIR
+#define GL_READDIR(pglob, stream) \
+ ((struct __old_dirent64 *) (pglob)->gl_readdir (stream))
#undef __readdir
#define __readdir(dirp) __old_readdir64 (dirp)
#undef glob
#define glob(pattern, flags, errfunc, pglob) \
__old_glob64 (pattern, flags, errfunc, pglob)
+#define convert_dirent __old_convert_dirent
#define glob_in_dir __old_glob_in_dir
#define GLOB_ATTRIBUTE attribute_compat_text_section

37
meta/recipes-core/glibc/glibc/CVE-2016-3075.patch Normal file
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@ -0,0 +1,37 @@
glibc-2.23: Fix CVE-2016-3075
[No upstream tracking] -- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-3075
resolv/nss_dns/dns-network.c: Stack overflow in _nss_dns_getnetbyname_r
The defensive copy is not needed because the name may not alias the
output buffer.
Upstream-Status: Backport
CVE: CVE-2016-3075
Signed-off-by: Andrej Valek <andrej.valek@siemens.com>
Signed-off-by: Pascal Bach <pascal.bach@siemens.com>
diff --git a/resolv/nss_dns/dns-network.c b/resolv/nss_dns/dns-network.c
index 2eb2f67..8f301a7 100644
--- a/resolv/nss_dns/dns-network.c
+++ b/resolv/nss_dns/dns-network.c
@@ -118,17 +118,14 @@ _nss_dns_getnetbyname_r (const char *name, struct netent *result,
} net_buffer;
querybuf *orig_net_buffer;
int anslen;
- char *qbuf;
enum nss_status status;
if (__res_maybe_init (&_res, 0) == -1)
return NSS_STATUS_UNAVAIL;
- qbuf = strdupa (name);
-
net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024);
- anslen = __libc_res_nsearch (&_res, qbuf, C_IN, T_PTR, net_buffer.buf->buf,
+ anslen = __libc_res_nsearch (&_res, name, C_IN, T_PTR, net_buffer.buf->buf,
1024, &net_buffer.ptr, NULL, NULL, NULL, NULL);
if (anslen < 0)
{

28
meta/recipes-core/glibc/glibc/CVE-2016-5417.patch Normal file
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@ -0,0 +1,28 @@
glibc-2.23: Fix CVE-2016-5417
[No upstream tracking] -- https://bugzilla.redhat.com/show_bug.cgi?id=1362534
resolv/res_init.c:Fix resource leak in resolver
The number of currently defined nameservers is stored in ->nscount,
whereas ->_u._ext.nscount is set by __libc_res_nsend only after local
initializations.
Upstream-Status: Backport
CVE: CVE-2016-5417
Signed-off-by: Andrej Valek <andrej.valek@siemens.com>
Signed-off-by: Pascal Bach <pascal.bach@siemens.com>
diff --git a/resolv/res_init.c b/resolv/res_init.c
index e0b6a80..6c951f5 100644
--- a/resolv/res_init.c
+++ b/resolv/res_init.c
@@ -594,7 +594,7 @@ __res_iclose(res_state statp, bool free_addr) {
statp->_vcsock = -1;
statp->_flags &= ~(RES_F_VC | RES_F_CONN);
}
- for (ns = 0; ns < statp->_u._ext.nscount; ns++)
+ for (ns = 0; ns < statp->nscount; ns++)
if (statp->_u._ext.nsaddrs[ns]) {
if (statp->_u._ext.nssocks[ns] != -1) {
close_not_cancel_no_status(statp->_u._ext.nssocks[ns]);

3
meta/recipes-core/glibc/glibc_2.23.bb
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@ -38,6 +38,9 @@ SRC_URI = "${GLIBC_GIT_URI};branch=${SRCBRANCH};name=glibc \
file://0026-When-disabling-SSE-make-sure-fpmath-is-not-set-to-us.patch \
file://CVE-2016-3706.patch \
file://CVE-2016-4429.patch \
file://CVE-2016-1234.patch \
file://CVE-2016-3075.patch \
file://CVE-2016-5417.patch \
"
SRC_URI += "\