Is CVE-2009-0023 in the CISA KEV catalog?

No. CVE-2009-0023 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-0023?

CVE-2009-0023 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2009-0023?

CVE-2009-0023 has an EPSS score of 8.53% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2009-0023?

Upgrade apr-util on debian 11 to 1.3.7+dfsg-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2009-0023

MEDIUMEPSS 94th pctl

4.3

CVSS v2

NVD

Description

The apr_strmatch_precompile function in strmatch/apr_strmatch.c in Apache APR-util before 1.3.5 allows remote attackers to cause a denial of service (daemon crash) via crafted input involving (1) a .htaccess file used with the Apache HTTP Server, (2) the SVNMasterURI directive in the mod_dav_svn module in the Apache HTTP Server, (3) the mod_apreq2 module for the Apache HTTP Server, or (4) an application that uses the libapreq2 library, which triggers a heap-based buffer underflow.

CWE-119Buffer Overflow

How to fix

Remediation Available

apr-utilDebian

Fixed in:1.3.7+dfsg-1CVE-2009-0023

Apache Lounge httpdWindows application

Affected:2.2.0 2.2.12Fixed in:2.2.12Apache Lounge

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

8.53%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.