Apache HTTP Server 2.2.x APR apr_fnmatch resource management

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Apache HTTP Server 2.2.x. The impacted element is the function apr_fnmatch of the component APR. Such manipulation leads to resource management. This vulnerability is uniquely identified as CVE-2011-0419. The attack can be launched remotely. Moreover, an exploit is present. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Apache HTTP Server 2.2.x (Web Server) and classified as critical. Affected by this issue is the function apr_fnmatch of the component APR. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. CVE summarizes:

Stack consumption vulnerability in the fnmatch implementation in apr_fnmatch.c in the Apache Portable Runtime (APR) library before 1.4.3 and the Apache HTTP Server before 2.2.18, and in fnmatch.c in libc in NetBSD 5.1, OpenBSD 4.8, FreeBSD, Apple Mac OS X 10.6, Oracle Solaris 10, and Android, allows context-dependent attackers to cause a denial of service (CPU and memory consumption) via *? sequences in the first argument, as demonstrated by attacks against mod_autoindex in httpd.

The weakness was disclosed 05/12/2011 by Maksymilian Arciemowicz (Website). The advisory is shared for download at securityreason.com. This vulnerability is handled as CVE-2011-0419 since 01/11/2011. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known.

The exploit is available at packetstormsecurity.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 68284 (Oracle Linux 4 / 5 / 6 : apr (ELSA-2011-0844)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 105728 (EOL/Obsolete Software: Apache HTTP Server 2.2.x).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at httpd.apache.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (35738), Tenable (68284), SecurityFocus (BID 47820†), Secunia (SA44574†) and SecurityTracker (ID 1025527†). The entries VDB-4353, VDB-4548, VDB-4582 and VDB-5298 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Support

  • end of life (old version)

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 68284
Nessus Name: Oracle Linux 4 / 5 / 6 : apr (ELSA-2011-0844)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 69734
OpenVAS Name: Debian Security Advisory DSA 2237-1 (apr)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: httpd.apache.org
Suricata ID: 2012926
Suricata Class: 🔍
Suricata Message: 🔍

Timelineinfo

01/11/2011 🔍
05/12/2011 +121 days 🔍
05/12/2011 +0 days 🔍
05/12/2011 +0 days 🔍
05/12/2011 +0 days 🔍
05/16/2011 +4 days 🔍
05/19/2011 +3 days 🔍
07/12/2013 +785 days 🔍
08/09/2024 +4046 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: securityreason.com
Researcher: Maksymilian Arciemowicz
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-0419 (🔍)
GCVE (CVE): GCVE-0-2011-0419
GCVE (VulDB): GCVE-100-4352

OVAL: 🔍
IAVM: 🔍

SecurityFocus: 47820 - Apache APR 'apr_fnmatch()' Denial of Service Vulnerability
Secunia: 44574 - Apache HTTP Server APR "apr_fnmatch()" Denial of Service Vulnerability, Moderately Critical
SecurityTracker: 1025527 - Apache APR Library apr_fnmatch() Flaw Lets Remote Users Execute Arbitrary Code

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 05/19/2011 02:00
Updated: 08/09/2024 04:14
Changes: 05/19/2011 02:00 (85), 04/16/2019 15:10 (7), 03/19/2021 10:17 (7), 03/19/2021 10:23 (1), 06/16/2024 14:59 (15), 08/09/2024 04:14 (2)
Complete: 🔍
Cache ID: 216:28C:103

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