com php-src: Fix for bug #68710 (Use After Free Vulnerability in PHP's unserialize()): NEWS ext/standard/tests/strings/bug68710.phpt
ext/standard/var_unserializer.c ext/standard/var_unseri alizer.re

Commit: b585a3aed7880a5fa5c18e2b838fc96f40e075bd Author: Stanislav Malyshev <stas@php.net> Thu, 1 Jan 2015 16:19:05 -0800 Parents: f9ad3086693fce680fbe246e4a45aa92edd2ac35 Branches: PHP-5.4 Link: http://git.php.net/?p=php-src.git;a=commitdiff;h=b585a3aed7880a5fa5c18e2b838fc96f40e075bd Log: Fix for bug #68710 (Use After Free Vulnerability in PHP's unserialize()) Bugs: https://bugs.php.net/68710 Changed paths: M NEWS A ext/standard/tests/strings/bug68710..phpt M ext/standard/var_unserializer.c M ext/standard/var_unserializer.re Diff: diff --git a/NEWS b/NEWS index fa57ef3..f789a92 100644 --- a/NEWS +++ b/NEWS @@ -1,6 +1,10 @@ PHP NEWS ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ?? ??? 20?? PHP 5.4.37 +- Core: + . Fix bug #68710 (Use after free vulnerability in unserialize(), incomplete + fix for #68594). (Stefan Esser) + - CGI: . Fix bug #68618 (out of bounds read crashes php-cgi). (Stas) diff --git a/ext/standard/tests/strings/bug68710.phpt b/ext/standard/tests/strings/bug68710.phpt new file mode 100644 index 0000000..729a120 --- /dev/null +++ b/ext/standard/tests/strings/bug68710.phpt @@ -0,0 +1,25 @@ +--TEST-- +Bug #68710 Use after free vulnerability in unserialize() (bypassing the +CVE-2014-8142 fix) +--FILE-- +<?php +for ($i=4; $i<100; $i++) { + $m = new StdClass(); + + $u = array(1); + + $m->aaa = array(1,2,&$u,4,5); + $m->bbb = 1; + $m->ccc = &$u; + $m->ddd = str_repeat("A", $i); + + $z = serialize($m); + $z = str_replace("aaa", "123", $z); + $z = str_replace("bbb", "123", $z); + $y = unserialize($z); + $z = serialize($y); +} +?> +===DONE=== +--EXPECTF-- +===DONE=== diff --git a/ext/standard/var_unserializer.c b/ext/standard/var_unserializer.c index a12d2fa..f114080 100644 --- a/ext/standard/var_unserializer.c +++ b/ext/standard/var_unserializer.c @@ -1,4 +1,4 @@ -/* Generated by re2c 0.13.7.5 on Thu Dec 11 19:26:19 2014 */ +/* Generated by re2c 0.13.7.5 on Thu Jan 1 14:43:18 2015 */ #line 1 "ext/standard/var_unserializer.re" /* +----------------------------------------------------------------------+ @@ -343,7 +343,7 @@ static inline int process_nested_data(UNSERIALIZE_PARAMETER, HashTable *ht, long } else { /* object properties should include no integers */ convert_to_string(key); - if (zend_symtable_find(ht, Z_STRVAL_P(key), Z_STRLEN_P(key) + 1, (void **)&old_data)==SUCCESS) { + if (zend_hash_find(ht, Z_STRVAL_P(key), Z_STRLEN_P(key) + 1, (void **)&old_data)==SUCCESS) { var_push_dtor(var_hash, old_data); } zend_hash_update(ht, Z_STRVAL_P(key), Z_STRLEN_P(key) + 1, &data, diff --git a/ext/standard/var_unserializer.re b/ext/standard/var_unserializer.re index 4cf1d10..f04fc74 100644 --- a/ext/standard/var_unserializer.re +++ b/ext/standard/var_unserializer..re @@ -347,7 +347,7 @@ static inline int process_nested_data(UNSERIALIZE_PARAMETER, HashTable *ht, long } else { /* object properties should include no integers */ convert_to_string(key); - if (zend_symtable_find(ht, Z_STRVAL_P(key), Z_STRLEN_P(key) + 1, (void **)&old_data)==SUCCESS) { + if (zend_hash_find(ht, Z_STRVAL_P(key), Z_STRLEN_P(key) + 1, (void **)&old_data)==SUCCESS) { var_push_dtor(var_hash, old_data); } zend_hash_update(ht, Z_STRVAL_P(key), Z_STRLEN_P(key) + 1, &data,