CVE-2016-3132 - Double Free

Severity

75%

Complexity

99%

Confidentiality

106%

Double free vulnerability in the SplDoublyLinkedList::offsetSet function in ext/spl/spl_dllist.c in PHP 7.x before 7.0.6 allows remote attackers to execute arbitrary code via a crafted index.

Double free vulnerability in the SplDoublyLinkedList::offsetSet function in ext/spl/spl_dllist.c in PHP 7.x before 7.0.6 allows remote attackers to execute arbitrary code via a crafted index.

CVSS 3.0 Base Score 9.8. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:P).

Demo Examples

Double Free

CWE-415

Double Free

CWE-415

While contrived, this code should be exploitable on Linux distributions which do not ship with heap-chunk check summing turned on.


               
}
free(buf1R2);

Overview

Type

PHP

First reported 8 years ago

2016-08-07 10:59:00

Last updated 8 years ago

2016-11-28 20:06:00

Affected Software

PHP 7.0.0

7.0.0

PHP 7.0.1

7.0.1

PHP 7.0.2

7.0.2

PHP 7.0.3

7.0.3

PHP 7.0.4

7.0.4

PHP 7.0.5

7.0.5

References

http://github.com/php/php-src/commit/28a6ed9f9a36b9c517e4a8a429baf4dd382fc5d5?w=1

Patch

92356

https://bugs.php.net/bug.php?id=71735

Exploit

https://php.net/ChangeLog-7.php

Patch, Release Notes

https://security-tracker.debian.org/tracker/CVE-2016-3132

Third Party Advisory, VDB Entry

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