01 Record

CVE-2023-24021

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

HighPUBLISHEDCNA: mitre

CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

View raw JSON

02 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

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.91% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 57.3% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2023-01-20 00:00Z3 YR AGO

Last updated

2025-04-02 16:18Z1 YR AGO

Reserved

2023-01-20

Assigning CNA

mitre

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weaknesses

CWE-170Improper Null TerminationBase
CWE-402Transmission of Private Resources into a New Sphere ('Resource Leak')Class

Data version

5.1

Document digest

cedd6e360bf214d70628e346e0277a01eb7612ef9dcb00068a770514f0d12d80

05 Affected products

VendorProductVersionsPlatforms

debiandebian_linuxNot specified—

redhatenterprise_linuxNot specified—

redhatjboss_core_servicesNot specified—

redhatrhel_software_collectionsNot specified—

trustwavemodsecurityNot specified—

06 References

github.comhttps://github.com/SpiderLabs/ModSecurity/releases/tag/v2.9.7
github.comhttps://github.com/SpiderLabs/ModSecurity/pull/2857
github.comhttps://github.com/SpiderLabs/ModSecurity/pull/2857/commits/4324f0ac59f8225aa44bc5034df60dbeccd1d334
lists.debian.org[debian-lts-announce] 20230126 [SECURITY] [DLA 3283-1] modsecurity-apache security updatehttps://lists.debian.org/debian-lts-announce/2023/01/msg00023.htmlmailing-list
lists.fedoraproject.orgFEDORA-2023-8aa264d5c5https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WCH6JM4I4MD4YABYFHSBDDOUFDGIFJKL/vendor-advisory
lists.fedoraproject.orgFEDORA-2023-09f0496e60https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/52TGCZCOHYBDCVWJYNN2PS4QLOHCXWTQ/vendor-advisory
lists.fedoraproject.orgFEDORA-2023-bc61f7a145https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SYRTXTOQQI6SB2TLI5QXU76DURSLS4XI/vendor-advisory

01 Record index

CVE-2023-24021

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2023-24021

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References