Resource exhaustion in Imbrn V8n
CVE-2022-35923
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.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.014 (68.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Imbrn V8n — versions < 1.5.1
- V8n_project V8n
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2022-35923?
- CVE-2022-35923 is a high-severity vulnerability in Imbrn V8n, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2022-08-02.
- How severe is CVE-2022-35923?
- High severity. CVSS v3 base score is 7.5 out of 10.