critical9.8
CVE-2020-1900
When unserializing an object with dynamic properties HHVM needs to pre-reserve the full size of the dynamic property array before inserting anything into it.
Impact
When unserializing an object with dynamic properties HHVM needs to pre-reserve the full size of the dynamic property array before inserting anything into it. Otherwise the array might resize, invalidating previously stored references. This pre-reservation was not occurring in HHVM prior to v4.32.3, between versions 4.33.0 and 4.56.0, 4.57.0, 4.58.0, 4.58.1, 4.59.0, 4.60.0, 4.61.0, 4.62.0.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Hhvm | before 4.32.3 from 4.33.0 before 4.56.1 Versions 4.57.0, 4.58.0, 4.58.1, 4.59.0 |