author | Craig Mohrman <craig.mohrman@oracle.com> |
Fri, 06 Feb 2015 14:28:07 -0800 | |
changeset 3745 | 9d42081739cf |
permissions | -rw-r--r-- |
3745
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Craig Mohrman <craig.mohrman@oracle.com>
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1 |
Fix from PHP community for CVE-2014-8142 |
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Bug: |
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https://bugs.php.net/bug.php?id=68594 |
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Code: |
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http://git.php.net/?p=php-src.git;a=commit;h=630f9c33c23639de85c3fd306b209b538b73b4c9 |
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This patch is for a newer version of php so this hand crafted equivalent |
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was created for php 5.3. |
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--- php-5.3.29/ext/standard/var_unserializer.re_orig 2014-08-13 12:22:50.000000000 -0700 |
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+++ php-5.3.29/ext/standard/var_unserializer.re 2015-02-05 14:51:58.796366953 -0800 |
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@@ -304,6 +304,9 @@ |
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} else { |
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/* object properties should include no integers */ |
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14 |
convert_to_string(key); |
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+ if (zend_symtable_find(ht, Z_STRVAL_P(key), Z_STRLEN_P(key) + 1, (void **)&old_data)==SUCCESS) { |
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+ var_push_dtor(var_hash, old_data); |
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+ } |
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zend_hash_update(ht, Z_STRVAL_P(key), Z_STRLEN_P(key) + 1, &data, |
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sizeof data, NULL); |
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} |
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--- php-5.3.29/ext/standard/var_unserializer.c_orig 2014-08-13 12:27:30.000000000 -0700 |
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+++ php-5.3.29/ext/standard/var_unserializer.c 2015-02-05 15:20:42.925115687 -0800 |
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@@ -298,6 +298,9 @@ |
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} else { |
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/* object properties should include no integers */ |
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convert_to_string(key); |
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+ if (zend_symtable_find(ht, Z_STRVAL_P(key), Z_STRLEN_P(key) + 1, (void **)&old_data)==SUCCESS) { |
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+ var_push_dtor(var_hash, old_data); |
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+ } |
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zend_hash_update(ht, Z_STRVAL_P(key), Z_STRLEN_P(key) + 1, &data, |
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sizeof data, NULL); |
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} |
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--- php-5.3.29/ext/standard/tests/serialize/bug68594.phpt_orig 2015-02-05 14:59:34.551069069 -0800 |
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+++ php-5.3.29/ext/standard/tests/serialize/bug68594.phpt 2015-02-05 14:54:28.269051205 -0800 |
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@@ -0,0 +1,23 @@ |
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+--TEST-- |
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+Bug #68545 Use after free vulnerability in unserialize() |
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+--FILE-- |
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+<?php |
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+for ($i=4; $i<100; $i++) { |
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+ $m = new StdClass(); |
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+ |
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+ $u = array(1); |
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+ |
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+ $m->aaa = array(1,2,&$u,4,5); |
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+ $m->bbb = 1; |
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+ $m->ccc = &$u; |
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+ $m->ddd = str_repeat("A", $i); |
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+ |
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+ $z = serialize($m); |
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+ $z = str_replace("bbb", "aaa", $z); |
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+ $y = unserialize($z); |
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+ $z = serialize($y); |
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+} |
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+?> |
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+===DONE=== |
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+--EXPECTF-- |
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+===DONE=== |