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.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: facebook

Published: 2021-03-11T00:55:19

Updated: 2024-08-04T06:53:59.985Z

Reserved: 2019-12-02T00:00:00

Link: CVE-2020-1899

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2021-03-11T01:15:14.333

Modified: 2021-03-18T14:14:23.757

Link: CVE-2020-1899

cve-icon Redhat

No data.