CVE-2020-1899
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Facebook Hhvm
PublishedMar 11, 2021
First seenMar 11, 2021
Weakness typeCWE-822CWE-822
How to fix
Update
- facebook hhvm4.32.3, 4.56.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| facebook hhvm | v < 4.32.3, 4.33.0 ≤ v < 4.56.1, 4.57.0, 4.58.0, 4.58.1, 4.59.0, 4.60.0, 4.61.0, 4.62.0 | 4.32.3, 4.56.1 |
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