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HIGH

The unserialize() function supported a type code, "S", which was meant to be supported only for APC serialization

Published Mar 11, 2021

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.

Affected products

Remediation

No remediation recorded yet.

References (3)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner facebook
Published Mar 11, 2021
Updated Aug 4, 2024
Reserved Dec 2, 2019
NVD
Status Modified
Modified Jun 17, 2026
Red Hat
Severity n/a
Public date n/a
ENISA EUVD
Assigner facebook
Published Mar 11, 2021
Updated Aug 4, 2024
Exploited since n/a
EUVD-2020-12725