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diff -U0 patch-2.6.1/ChangeLog.CVE-2010-4651 patch-2.6.1/ChangeLog
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diff -up patch-2.6.1/Makefile.in.CVE-2010-4651 patch-2.6.1/Makefile.in
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--- patch-2.6.1/Makefile.in.CVE-2010-4651 2011-02-08 11:26:21.782503673 +0000
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+++ patch-2.6.1/Makefile.in 2011-02-08 11:26:56.004078346 +0000
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@@ -192,6 +192,7 @@ installcheck::
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TESTS = \
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tests/asymmetric-hunks \
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tests/backup-prefix-suffix \
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+ tests/bad-filenames \
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tests/corrupt-reject-files \
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tests/create-delete \
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tests/crlf-handling \
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diff -up patch-2.6.1/NEWS.CVE-2010-4651 patch-2.6.1/NEWS
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diff -up patch-2.6.1/src/pch.c.CVE-2010-4651 patch-2.6.1/src/pch.c
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--- patch-2.6.1/src/pch.c.CVE-2010-4651 2009-12-30 12:56:30.000000000 +0000
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+++ patch-2.6.1/src/pch.c 2011-02-08 11:25:53.821034698 +0000
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@@ -3,7 +3,7 @@
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/* Copyright (C) 1986, 1987, 1988 Larry Wall
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Copyright (C) 1990, 1991, 1992, 1993, 1997, 1998, 1999, 2000, 2001,
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- 2002, 2003, 2006, 2009 Free Software Foundation, Inc.
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+ 2002, 2003, 2006, 2009, 2011 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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@@ -194,11 +194,31 @@ grow_hunkmax (void)
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return false;
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}
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+static void
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+validate_target_name (char const *n)
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+{
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+ char const *p = n;
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+ if (IS_ABSOLUTE_FILE_NAME (p))
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+ fatal ("rejecting absolute target file name: %s", quotearg (p));
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+ while (*p)
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+ {
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+ if (*p == '.' && *++p == '.' && ( ! *++p || ISSLASH (*p)))
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+ fatal ("rejecting target file name with \"..\" component: %s",
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+ quotearg (n));
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+ while (*p && ! ISSLASH (*p))
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+ p++;
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+ while (ISSLASH (*p))
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+ p++;
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+ }
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+}
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+
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static bool
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maybe_reverse (char const *name, bool nonexistent, bool is_empty)
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{
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bool looks_reversed = (! is_empty) < p_says_nonexistent[reverse ^ is_empty];
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+ validate_target_name (name);
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+
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if (looks_reversed)
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reverse ^=
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ok_to_reverse ("The next patch%s would %s the file %s,\nwhich %s!",
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@@ -725,6 +745,7 @@ intuit_diff_type (bool need_header)
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inerrno = stat_errno[i];
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invc = version_controlled[i];
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instat = st[i];
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+ validate_target_name (inname);
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}
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return retval;
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diff -up patch-2.6.1/tests/bad-filenames.CVE-2010-4651 patch-2.6.1/tests/bad-filenames
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--- patch-2.6.1/tests/bad-filenames.CVE-2010-4651 2011-02-08 11:24:57.517092060 +0000
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+++ patch-2.6.1/tests/bad-filenames 2011-02-08 11:24:57.518092076 +0000
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@@ -0,0 +1,63 @@
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+# Copyright (C) 2011 Free Software Foundation, Inc.
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+#
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+# Copying and distribution of this file, with or without modification,
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+# in any medium, are permitted without royalty provided the copyright
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+# notice and this notice are preserved.
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+
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+. $srcdir/test-lib.sh
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+
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+use_local_patch
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+use_tmpdir
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+
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+# ================================================================
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+
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+emit_2()
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+{
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+cat <
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+--- $1
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++++ $2
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+@@ -0,0 +1 @@
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++x
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+EOF
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+}
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+
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+emit_patch() { emit_2 /dev/null "$1"; }
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+
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+# Ensure that patch rejects an output file name that is absolute
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+# or that contains a ".." component.
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+
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+check 'emit_patch /absolute/path | patch -p0; echo status: $?' <
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+$PATCH: **** rejecting absolute target file name: /absolute/path
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+status: 2
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+EOF
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+
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+check 'emit_patch a/../z | patch -p0; echo status: $?' <
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+$PATCH: **** rejecting target file name with ".." component: a/../z
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+status: 2
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+EOF
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+
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+check 'emit_patch a/../z | patch -p1; echo status: $?' <
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+$PATCH: **** rejecting target file name with ".." component: ../z
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+status: 2
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+EOF
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+
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+check 'emit_patch a/.. | patch -p0; echo status: $?' <
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+$PATCH: **** rejecting target file name with ".." component: a/..
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+status: 2
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+EOF
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+
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+check 'emit_patch ../z | patch -p0; echo status: $?' <
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+$PATCH: **** rejecting target file name with ".." component: ../z
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+status: 2
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+EOF
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+
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+check 'emit_2 /abs/path target | patch -p0; echo status: $?' <
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+patching file target
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+status: 0
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+EOF
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+
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+echo x > target
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+check 'emit_2 /abs/path target | patch -R -p0; echo status: $?' <
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+patching file target
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+status: 0
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+EOF
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