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CVE-2009-0023

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…

Severity
Medium 4.3
Published
8 Jun 2009
Last changed
16 Jun 2026
Added to UpHeron
17 Oct 2026
Fixed in
2.2.12
Exploit chance
8.5% in the next 30 daysHigher than 95% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Memory buffer errors (CWE-119)
Attack
Over the network · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:M/Au:N/C:N/I:N/A:P
Sources
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.

From NVD.

Affected software

SoftwareAffected versions
Apache HTTP ServerServers and applications · cpe:a:apache:http_server
  • From 2.2.0 before 2.2.12

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2009-0023
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2009-0023