CVE-2022-35923
High
Description
v8n is a javascript validation library. Versions of v8n prior to 1.5.1 were found to have an inefficient regular expression complexity in the `lowercase()` and `uppercase()` regex which could lead to a denial of service attack. In testing of the `lowercase()` function a payload of 'a' + 'a'.repeat(i) + 'A' with 32 leading characters took 29443 ms to execute. The same issue happens with uppercase(). Users are advised to upgrade. There are no known workarounds for this issue.
SeverityHigh
CVSS7.5
Exploit probability—
ProductV8n
PublishedAug 2, 2022
First seenAug 2, 2022
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- v8n_project v8n1.5.1 or later
- v8n1.5.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| v8n_project v8n | v < 1.5.1 | 1.5.1 |
| v8nnpm | v < 1.5.1 | 1.5.1 |
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