CVE-2016-4344

critical

Description

Integer overflow in the xml_utf8_encode function in ext/xml/xml.c in PHP before 7.0.4 allows remote attackers to cause a denial of service or possibly have unspecified other impact via a long argument to the utf8_encode function, leading to a heap-based buffer overflow.

References

https://euvd.enisa.europa.eu/vulnerability/EUVD-2016-5344

https://bugs.php.net/bug.php?id=71637

http://www.openwall.com/lists/oss-security/2016/04/28/2

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

Details

Source: Mitre, NVD

Published: 2016-05-22

Updated: 2026-05-06

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.05175