CVE-2020-1899 | BDVDB-2026-150269 Detail

Description#

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 4.56.0, 4.57.0, 4.58.0, 4.58.1, 4.59.0, 4.60.0, 4.61.0, 4.62.0.

Impact#

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Exploit#

History#

1. Version 12021-03-11Record published in the CVE List.
2. Version 22024-08-04Most recent update recorded in the CVE List.