Vulnerability CVE-2017-12933
Published: 2017-08-17   Modified: 2017-08-18

Description:
The finish_nested_data function in ext/standard/var_unserializer.re in PHP before 5.6.31, 7.0.x before 7.0.21, and 7.1.x before 7.1.7 is prone to a buffer over-read while unserializing untrusted data. Exploitation of this issue can have an unspecified impact on the integrity of PHP.

Type:

CWE-125

 (Out-of-bounds Read)

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-5.php
http://php.net/ChangeLog-7.php
http://www.securityfocus.com/bid/99490
https://access.redhat.com/errata/RHSA-2018:1296
https://bugs.php.net/bug.php?id=74111
https://usn.ubuntu.com/3566-1/
https://usn.ubuntu.com/3566-2/
https://www.debian.org/security/2018/dsa-4080
https://www.debian.org/security/2018/dsa-4081
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