| Package | Affected versions | Patched versions |
|---|---|---|
| php | = 5.6.0= 5.6.1= 5.6.10= 5.6.11= 5.6.12= 5.6.13= 5.6.14= 5.6.15= 5.6.16= 5.6.17= 5.6.18= 5.6.19= 5.6.2= 5.6.20= 5.6.3= 5.6.4= 5.6.5= 5.6.6= 5.6.7= 5.6.8= 5.6.9= 7.0.0= 7.0.1= 7.0.2= 7.0.3= 7.0.4= 7.0.5≤ 5.5.33 |
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.
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