HIGH
The get_icu_disp_value_src_php function in ext/intl/locale/locale_methods.c in PHP before 5.3.29, 5.4.x before 5.4.30, and 5.5.x before 5.5.14 does not properly restrict calls to the ICU uresbund.cpp component, which allows remote attackers to cause a denial of service (buffer overflow) or possibly have unspecified other impact via a locale_get_display_name call with a long first argument.
http://www.openwall.com/lists/oss-security/2016/11/25/1
http://www.php.net/ChangeLog-5.php
http://www.securityfocus.com/bid/68549
Source: MITRE
Published: 2017-01-04
Updated: 2017-01-07
Type: CWE-119
Base Score: 7.5
Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Impact Score: 6.4
Exploitability Score: 10
Severity: HIGH
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 3.9
Severity: CRITICAL