Vulnerability CVE-2017-12932
Published: 2017-08-17   Modified: 2017-08-18

Description:
ext/standard/var_unserializer.re in PHP 7.0.x through 7.0.22 and 7.1.x through 7.1.8 is prone to a heap use after free while unserializing untrusted data, related to improper use of the hash API for key deletion in a situation with an invalid array size. Exploitation of this issue can have an unspecified impact on the integrity of PHP.

Type:

CWE-416

 (Use After Free)

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

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
PHP -> PHP 

 References:
http://php.net/ChangeLog-7.php
http://www.securityfocus.com/bid/100427
https://access.redhat.com/errata/RHSA-2018:1296
https://bugs.php.net/bug.php?id=74103
https://github.com/php/php-src/commit/1a23ebc1fff59bf480ca92963b36eba5c1b904c4
https://security.gentoo.org/glsa/201709-21
https://security.netapp.com/advisory/ntap-20180112-0001/
https://www.debian.org/security/2018/dsa-4080
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