CVE-2022-35923
v8n vulnerable to Inefficient Regular Expression Complexity
Description
### Impact Inefficient regular expression complexity of `lowercase()` and `uppercase()` regex could lead to a denial of service attack. With a formed payload `'a' + 'a'.repeat(i) + 'A'`, only 32 characters payload could take 29443 ms time execution when testing `lowercase()`. The same issue happens with `uppercase()`. ### Patches v1.5.1 ### References [huntr.dev report](https://huntr.dev/bounties/2d92f644-593b-43b4-bfd1-c8042ac60609) [_Regular Expression Denial of Service (ReDoS) and Catastrophic Backtracking_](https://snyk.io/blog/redos-and-catastrophic-backtracking/) ### For more information If you have any questions or comments about this advisory: * Open an issue in [v8n issues list](https://github.com/imbrn/v8n) * Email us at [[email protected]](mailto:[email protected])
How to fix CVE-2022-35923
To remediate CVE-2022-35923, upgrade the affected package to a fixed version below.
- —upgrade to 1.5.1 or later
Is CVE-2022-35923 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.5.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |