CVE-2017-7189 Information

Description

main/streams/xp_socket.c in PHP 7.x before 2017-03-07 misparses fsockopen calls such as by interpreting fsockopen(‘127.0.0.1:80’ 443) as if the address/port were 127.0.0.1:80:443 which is later truncated to 127.0.0.1:80. This behavior has a security risk if the explicitly provided port number (i.e. 443 in this example) is hardcoded into an application as a security policy but the hostname argument (i.e. 127.0.0.1:80 in this example) is obtained from untrusted input.

CVSS Vector

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

Reference

https://bugs.php.net/bug.php?id=74192 https://github.com/php/php-src/commit/bab0b99f376dac9170ac81382a5ed526938d595a

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

7.5