Vulnerability CVE-2017-12934


Published: 2017-08-17   Modified: 2017-08-18

Description:
ext/standard/var_unserializer.re in PHP 7.0.x before 7.0.21 and 7.1.x before 7.1.7 is prone to a heap use after free while unserializing untrusted data, related to the zval_get_type function in Zend/zend_types.h. Exploitation of this issue can have an unspecified impact on the integrity of PHP.

Type:

CWE-416

(Use After Free)

Vendor: PHP
Product: PHP 
Version:
7.1.6
7.1.5
7.1.4
7.1.3
7.1.2
7.1.1
7.1.0
7.0.9
7.0.8
7.0.7
7.0.6
7.0.5
7.0.4
7.0.3
7.0.20
7.0.2
7.0.19
7.0.18
7.0.17
7.0.16
7.0.15
7.0.14
7.0.13
7.0.12
7.0.11
7.0.10
7.0.1
7.0.0

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None

 References:
http://php.net/ChangeLog-7.php
http://www.securityfocus.com/bid/100428
https://access.redhat.com/errata/RHSA-2018:1296
https://bugs.php.net/bug.php?id=74101
https://www.debian.org/security/2018/dsa-4080

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