CVE-2020-1898
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Facebook Hhvm
PublishedMar 11, 2021
First seenMar 11, 2021
Weakness typeCWE-674CWE-674
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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