Description

The bcpowmod function in ext/bcmath/bcmath.c in PHP before 5.5.35, 5.6.x before 5.6.21, and 7.x before 7.0.6 modifies certain data structures without considering whether they are copies of the _zero_, _one_, or _two_ global variable, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted call.

Remediation

References

CVE-2016-4538

Related Vulnerabilities

Liferay DXP Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2023-33939)

Jboss EAP Permissions, Privileges, and Access Controls Vulnerability (CVE-2016-8656)

WordPress Plugin Easy Social Feed-Social Photos Gallery-Post Feed-Like Box Cross-Site Scripting (6.2.6)

PHP Configuration Vulnerability (CVE-2008-5844)

Apache HTTP Server Improper Authentication Vulnerability (CVE-2017-3167)

Severity

Critical

Classification

CVE-2016-4538 CWE-20 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Tags

Missing Update Known Vulnerabilities