CVE-2017-12933 Information

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8