CVE-2016-7480 Information

Description

The SplObjectStorage unserialize implementation in ext/spl/spl_observer.c in PHP before 7.0.12 does not verify that a key is an object which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized memory access) via crafted serialized data.

CVSS Vector

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

Reference

http://blog.checkpoint.com/2016/12/27/check-point-discovers-three-zero-day-vulnerabilities-web-programming-language-php-7 http://blog.checkpoint.com/wp-content/uploads/2016/12/PHP_Technical_Report.pdf http://php.net/ChangeLog-7.php http://www.securityfocus.com/bid/95152 https://bugs.php.net/bug.php?id=73257 https://github.com/php/php-src/commit/61cdd1255d5b9c8453be71aacbbf682796ac77d4 https://security.netapp.com/advisory/ntap-20180112-0001/ https://www.youtube.com/watch?v=LDcaPstAuPk

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