Security Advisory

CVE-2020-1898

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2021-03-11 00:55:18

Last updated 2024-08-04 06:53:59

Assigner facebook

State PUBLISHED

Description

The fb_unserialize function did not impose a depth limit for nested deserialization. That meant a maliciously constructed string could cause deserialization to recurse, leading to stack exhaustion. 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.

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