CVE-2022-35923
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.63%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.63% probability · 75th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400, CWE-1333
- Affected
- v8n project/v8n
- Source
- security-advisories@github.com
References
- https://github.com/imbrn/v8n/commit/92393862156fad190c05ec3f6e2bc73308dcd2f9Patch, Third Party Advisory
- https://github.com/imbrn/v8n/security/advisories/GHSA-xrx9-gj26-5wx9Third Party Advisory
- https://huntr.dev/bounties/2d92f644-593b-43b4-bfd1-c8042ac60609/Exploit, Third Party Advisory
- https://github.com/imbrn/v8n/commit/92393862156fad190c05ec3f6e2bc73308dcd2f9Patch, Third Party Advisory
- https://github.com/imbrn/v8n/security/advisories/GHSA-xrx9-gj26-5wx9Third Party Advisory
- https://huntr.dev/bounties/2d92f644-593b-43b4-bfd1-c8042ac60609/Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.