CVE-2023-24021

Publication date 20 January 2023

Last updated 26 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

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.

Status

Package Ubuntu Release Status
modsecurity-apache 25.10 questing
Not affected
25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.10 kinetic Ignored end of life, was needs-triage
22.04 LTS jammy
Fixed 2.9.5-1ubuntu0.1~esm1
20.04 LTS focal
Fixed 2.9.3-1ubuntu0.1
18.04 LTS bionic
Fixed 2.9.2-1ubuntu0.1~esm1
16.04 LTS xenial
Fixed 2.9.0-1ubuntu0.1~esm1
14.04 LTS trusty
Not affected

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Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-6370-1
    • ModSecurity vulnerabilities
    • 14 September 2023

Other references