The fnmatch implementation in apr_fnmatch.c in the Apache Portable Runtime (APR) library 1.4.3 and 1.4.4, and the Apache HTTP Server 2.2.18,
The fnmatch implementation in apr_fnmatch.c in the Apache Portable Runtime (APR) library 1.4.3 and 1.4.4, and the Apache HTTP Server 2.2.18, allows remote attackers to cause a denial of service (infinite loop) via a URI that does not match unspecified types of wildcard patterns, as demonstrated by attacks against mod_autoindex in httpd when a /*/WEB-INF/ configuration pattern is used. NOTE: this issue exists because of an incorrect fix for CVE-2011-0419.
- Published
- May 24, 2011
- Updated
- Jun 16, 2026
- EPSS
- 10.3% · 96th percentile
- CWE
- CWE-399
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Report tools
Action score
20
Monitor
Low priority for now.
- CVSS
- 17 / 40 · 4.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 3 / 30 · 10.3%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| apache | apr-util | cpe:2.3:a:apache:apr-util |
| apache | http server | cpe:2.3:a:apache:http_server |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apache http server2.2.18
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | apr | before 1.4.5-1 | 1.4.5-1 |
| Debian:5.0 | apr | before 1.2.12-5+lenny4 | 1.2.12-5+lenny4 |
| Debian:6.0 | apr | before 1.4.2-6+squeeze2 | 1.4.2-6+squeeze2 |
| openSUSE:Tumbleweed | apr | before 1.7.0-3.1 | 1.7.0-3.1 |
| openSUSE:Tumbleweed | apr | before 1.5.2-3.4 | 1.5.2-3.4 |
| Red Hat:enterprise_linux:4::as | apr | before 0:0.9.4-26.el4 | 0:0.9.4-26.el4 |
| Red Hat:enterprise_linux:4::as | apr-debuginfo | before 0:0.9.4-26.el4 | 0:0.9.4-26.el4 |
| Red Hat:enterprise_linux:4::as | apr-devel | before 0:0.9.4-26.el4 | 0:0.9.4-26.el4 |
| Red Hat:enterprise_linux:5::client | apr-docs | before 0:1.2.7-11.el5_6.5 | 0:1.2.7-11.el5_6.5 |
| Red Hat:enterprise_linux:5::client_workstation | apr | before 0:1.2.7-11.el5_6.5 | 0:1.2.7-11.el5_6.5 |
| Red Hat:enterprise_linux:5::client_workstation | apr-debuginfo | before 0:1.2.7-11.el5_6.5 | 0:1.2.7-11.el5_6.5 |
| Red Hat:enterprise_linux:5::client_workstation | apr-devel | before 0:1.2.7-11.el5_6.5 | 0:1.2.7-11.el5_6.5 |
| Red Hat:enterprise_linux:6::server | apr | before 0:1.3.9-3.el6_1.2 | 0:1.3.9-3.el6_1.2 |
| Red Hat:enterprise_linux:6::server | apr-debuginfo | before 0:1.3.9-3.el6_1.2 | 0:1.3.9-3.el6_1.2 |
| Red Hat:enterprise_linux:6::server | apr-devel | before 0:1.3.9-3.el6_1.2 | 0:1.3.9-3.el6_1.2 |
Same product
apache: all recordsOther highest-scoring records for the same primary product.
- CVE-2009-1955The expat XML parser in the apr_xml_* interface in xml/apr_xml.c in Apache APR-util before 1.3.7, as used in the mod_dav and mod_dav_svn mod46Plan
- CVE-2009-2412Multiple integer overflows in the Apache Portable Runtime (APR) library and the Apache Portable Utility library (aka APR-util) 0.9.x and 1.344Plan
- CVE-2026-34191Apache Portable Runtime Utility: SQL Injection in apr_dbd_oracle36Monitor
- CVE-2026-32327Apache Portable Runtime Utility: apr-util XML stack recursion crash36Monitor
- CVE-2025-49506Apache Portable Runtime Utility: apr_password_validate() vulnerable to timing attack30Monitor
- CVE-2026-34502Apache Portable Runtime Utility: Heap buffer overflow in APR memcached client30Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:apr | 1.4.5-1 · Debian:12 | Package registry (OSV) |
| opensuse:apr | 1.5.2-3.4 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:apr | 0:0.9.4-26.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:apr-debuginfo | 0:0.9.4-26.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:apr-devel | 0:0.9.4-26.el4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:apr-docs | 0:1.2.7-11.el5_6.5 · Red Hat:enterprise_linux:5::client | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- P · the service can be disrupted
- Attack complexity
- M
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- P
Weakness class (CWE)
CWE-399 · Resource Management ErrorsCVSS vector
AV:N/AC:M/Au:N/C:N/I:N/A:P
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- bugs.debian.org/cgi-bin/bugreport.cgi?bug=627182
- lists.opensuse.org/opensuse-security-announce/2011-11/msg00011.html
- mail-archives.apache.org/mod_mbox/httpd-announce/201105.mbox/%3C4DD55092.3030403%40apache.org%3E
- mail-archives.apache.org/mod_mbox/www-announce/201105.mbox/%3c4DD55076.1060005%40apache.org%3e
- marc.info/?l=bugtraq&m=134987041210674&w=2
- openwall.com/lists/oss-security/2011/05/19/10
- openwall.com/lists/oss-security/2011/05/19/5
- secunia.com/advisories/44558
- secunia.com/advisories/44613
- secunia.com/advisories/44661
- secunia.com/advisories/44780
- secunia.com/advisories/48308
- www.mandriva.com/security/advisories?name=MDVSA-2011:095
- www.redhat.com/support/errata/RHSA-2011-0844.html
- www.vupen.com/english/advisories/2011/1289
- www.vupen.com/english/advisories/2011/1290
- issues.apache.org/bugzilla/show_bug.cgi?id=51219
Vendor advisories and official records. Exploit/PoC links are deliberately left out.