CVE-2020-1900

Summary

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 Software

VendorProductVersion RangeStatus
FacebookHHVM4.62.1 < unspecifiedunaffected
FacebookHHVM4.62.0affected
FacebookHHVM4.61.1 < unspecifiedunaffected
FacebookHHVM4.61.0affected
FacebookHHVM4.60.1 < unspecifiedunaffected
FacebookHHVM4.60.0affected
FacebookHHVM4.59.1 < unspecifiedunaffected
FacebookHHVM4.59.0affected
FacebookHHVM4.58.2 < unspecifiedunaffected
FacebookHHVM4.58.0 < unspecifiedaffected
FacebookHHVM4.57.1 < unspecifiedunaffected
FacebookHHVM4.57.0affected
FacebookHHVM4.56.1 < unspecifiedunaffected
FacebookHHVM4.33.0 < unspecifiedaffected
FacebookHHVM4.32.3 < unspecifiedunaffected
FacebookHHVMunspecified < 4.32.3affected

Weaknesses

  • CWE-416: Use After Free (CWE-416)

ADP Enrichment

CVE Program Container

Additional References

References