CVE-2023-24021
7.5
HIGH
CVSS 3.1
EPSS 0.14%
Description
Incorrect handling of '\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the FILES_TMP_CONTENT collection.
How to fix CVE-2023-24021
To remediate CVE-2023-24021, upgrade the affected package to a fixed version below.
- Bitnami/modsecurity—upgrade to 2.9.7 or later
- —upgrade to 2.9.7 or later
- —upgrade to 2.9.3-3+deb11u2 or later
Is CVE-2023-24021 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 2.9.7
- from 0, < 2.9.7
- from 0, < 2.9.3-3+deb11u2
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:H/A:N |