CVE-2020-1919
Last modified
CVE-2020-1919 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Incorrect bounds calculations in substr_compare could lead to an out-of-bounds read when the second string argument passed in is longer than the first. This issue affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.. EPSS estimates a 1.22% chance of exploitation in the next 30 days.
Description
Incorrect bounds calculations in substr_compare could lead to an out-of-bounds read when the second string argument passed in is longer than the first. This issue affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Hhvm | < 4.56.3 | |
| Hhvm | >= 4.57.0, < 4.80.2 | |
| Hhvm | >= 4.81.0, < 4.93.2 | |
| Hhvm | 4.94.0 | |
| Hhvm | 4.95.0 | |
| Hhvm | 4.96.0 | |
| Hhvm | 4.97.0 | |
| Hhvm | 4.98.0 |
References
- https://github.com/facebook/hhvm/commit/08193b7f0cd3910256e00d599f0f3eb2519c44caPatch, Third Party Advisory
- https://hhvm.com/blog/2021/02/25/security-update.htmlRelease Notes, Vendor Advisory
- https://github.com/facebook/hhvm/commit/08193b7f0cd3910256e00d599f0f3eb2519c44caPatch, Third Party Advisory
- https://hhvm.com/blog/2021/02/25/security-update.htmlRelease Notes, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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