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Adapted for PHP 5.4.16 from
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From 56754a7f9eba0e4f559b6ca081d9f2a447b3f159 Mon Sep 17 00:00:00 2001
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From: Stanislav Malyshev <stas@php.net>
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Date: Sun, 28 Sep 2014 14:19:31 -0700
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Subject: [PATCH] Fixed bug #68044: Integer overflow in unserialize() (32-bits
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only)
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---
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NEWS | 5 ++++-
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ext/standard/tests/serialize/bug68044.phpt | 12 ++++++++++++
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ext/standard/var_unserializer.c | 4 ++--
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ext/standard/var_unserializer.re | 2 +-
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4 files changed, 19 insertions(+), 4 deletions(-)
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create mode 100644 ext/standard/tests/serialize/bug68044.phpt
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diff --git a/ext/standard/tests/serialize/bug68044.phpt b/ext/standard/tests/serialize/bug68044.phpt
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new file mode 100644
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index 0000000..031e44e
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--- /dev/null
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+++ b/ext/standard/tests/serialize/bug68044.phpt
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@@ -0,0 +1,12 @@
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+--TEST--
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+Bug #68044 Integer overflow in unserialize() (32-bits only)
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+--FILE--
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+
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+ echo unserialize('C:3:"XYZ":18446744075857035259:{}');
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+?>
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+===DONE==
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+--EXPECTF--
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+Warning: Insufficient data for unserializing - %d required, 1 present in %s/bug68044.php on line 2
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+
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+Notice: unserialize(): Error at offset 32 of 33 bytes in %s/bug68044.php on line 2
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+===DONE==
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diff --git a/ext/standard/var_unserializer.c b/ext/standard/var_unserializer.c
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index 657051f..8129da3 100644
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--- a/ext/standard/var_unserializer.c
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+++ b/ext/standard/var_unserializer.c
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@@ -344,7 +344,7 @@ static inline int object_custom(UNSERIALIZE_PARAMETER, zend_class_entry *ce)
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(*p) += 2;
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- if (datalen < 0 || (*p) + datalen >= max) {
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+ if (datalen < 0 || (max - (*p)) <= datalen) {
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zend_error(E_WARNING, "Insufficient data for unserializing - %ld required, %ld present", datalen, (long)(max - (*p)));
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return 0;
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}
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diff --git a/ext/standard/var_unserializer.re b/ext/standard/var_unserializer.re
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index 1307508..6de1583 100644
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--- a/ext/standard/var_unserializer.re
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+++ b/ext/standard/var_unserializer.re
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@@ -350,7 +350,7 @@ static inline int object_custom(UNSERIALIZE_PARAMETER, zend_class_entry *ce)
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(*p) += 2;
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- if (datalen < 0 || (*p) + datalen >= max) {
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+ if (datalen < 0 || (max - (*p)) <= datalen) {
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zend_error(E_WARNING, "Insufficient data for unserializing - %ld required, %ld present", datalen, (long)(max - (*p)));
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return 0;
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}
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--
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2.1.0
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