CVE-2020-1899

The unserialize function supported a type code, "S", which was meant to be supported only for APC serialization. This type code allowed arbitrary memory addresses to be accessed as if they were static StringData objects. This issue affected HHVM prior to v4.32.3, between versions 4.33.0 and 4.56....

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. Otherwise the array might resize, invalidating previously stored references. This pre-reservation was not occurring in HHVM prior to v4.32....

Facebook HHVM 资源管理错误漏洞

Facebook HHVM a.k.a. HipHop Virtual Machine is a virtual machine from Facebook Inc. that significantly improves the performance of loading dynamic pages in PHP. A security vulnerability exists in HHVM, which arises from the deserialization of objects with dynamic attributes, resulting in the...