CVE-2009-2299 — The Artofdefence Hyperguard Web Application Firewall (WAF) module before 2.5.5-11635, 3.0 before 3.0.3-11636, and 3.1 before 3.1.1-11637, a module for the Apache HTTP Server, allows remote attackers to cause a denial of service (memory consumption) via an HTTP request with a large Content-Length value but no POST data

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MEDIUM

The Artofdefence Hyperguard Web Application Firewall (WAF) module before 2.5.5-11635, 3.0 before 3.0.3-11636, and 3.1 before 3.1.1-11637, a module for the Apache HTTP Server, allows remote attackers to cause a denial of service (memory consumption) via an HTTP request with a large Content-Length value but no POST data

Published Jul 2, 2009

5.0

MEDIUM

CVSS 2.0

EPSS 4.25%

Description

The Artofdefence Hyperguard Web Application Firewall (WAF) module before 2.5.5-11635, 3.0 before 3.0.3-11636, and 3.1 before 3.1.1-11637, a module for the Apache HTTP Server, allows remote attackers to cause a denial of service (memory consumption) via an HTTP request with a large Content-Length value but no POST data.

Affected products

Remediation

No remediation recorded yet.

Metrics

4.25% 0.04255

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.04255

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	4.25% (0.04255)	90.75th	v5 (v2026.06.15)
Jun 15, 2026	4.25% (0.04255)	89.74th	v5 (v2026.06.15)
Mar 17, 2025	1.13% (0.01134)	76.87th	v4 (v2025.03.14)
Dec 12, 2024	0.48% (0.00484)	76.77th	v3 (v2023.03.01)
Feb 8, 2024	0.48% (0.00484)	75.25th	v3 (v2023.03.01)
Mar 7, 2023	0.48% (0.00484)	72.22th	v3 (v2023.03.01)
Mar 6, 2023	1.14% (0.01136)	59.45th	v2 (v2022.01.01)
Oct 18, 2022	1.14% (0.01136)	58.28th	v2 (v2022.01.01)
Apr 1, 2022	1.14% (0.01136)	56.27th	v2 (v2022.01.01)
Feb 4, 2022	1.14% (0.01136)	34.23th	v2 (v2022.01.01)

Weaknesses (0)

No CWE recorded.

References (3)

http://secunia.com/advisories/35645
third-party-advisoryx_refsource_SECUNIAThird Party Advisory
http://www.h4ck1nb3rg.at/wafs/advisory_artofdefence_hyperguard_200907.txt
x_refsource_MISCBroken Link
http://www.securityfocus.com/archive/1/504680/100/0/threaded
mailing-listx_refsource_BUGTRAQThird Party AdvisoryVDB Entry

Link	Providers	Tags
http://secunia.com/advisories/35645		third-party-advisoryx_refsource_SECUNIAThird Party Advisory
http://www.h4ck1nb3rg.at/wafs/advisory_artofdefence_hyperguard_200907.txt		x_refsource_MISCBroken Link
http://www.securityfocus.com/archive/1/504680/100/0/threaded		mailing-listx_refsource_BUGTRAQThird Party AdvisoryVDB Entry

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Jul 2, 2009

Updated Aug 7, 2024

Reserved Jul 2, 2009

Link CVE-2009-2299

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2009-2299

Red Hat

Severity n/a

Public date n/a

Links CVE-2009-2299