CVE-2020-1898
Last modified
CVE-2020-1898 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 1.21% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Hhvm | < 4.32.3 | |
| Hhvm | >= 4.33.0, < 4.56.1 | |
| Hhvm | 4.57.0 | |
| Hhvm | 4.58.0 | |
| Hhvm | 4.58.1 | |
| Hhvm | 4.59.0 | |
| Hhvm | 4.60.0 | |
| Hhvm | 4.61.0 | |
| Hhvm | 4.62.0 |
References
- https://github.com/facebook/hhvm/commit/1746dfb11fc0048366f34669e74318b8278a684cPatch, Third Party Advisory
- https://hhvm.com/blog/2020/06/30/security-update.htmlVendor Advisory
- https://github.com/facebook/hhvm/commit/1746dfb11fc0048366f34669e74318b8278a684cPatch, Third Party Advisory
- https://hhvm.com/blog/2020/06/30/security-update.htmlVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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