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CVE-2016-4538

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 consideri…

Impact

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.

Affected products

VendorProductAffected versions
PhpPhp
through 5.5.33
Versions 5.6.0, 5.6.1, 5.6.2, 5.6.3, 5.6.4
FedoraprojectFedora
Version 24
OpensuseLeap
Version 42.1

Weakness classification

CWE-20

References