Apache HTTP Server up to 2.0.33 mod_dav dav_xml_get_cdata input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Apache HTTP Server up to 2.0.33. It has been rated as problematic. The impacted element is the function dav_xml_get_cdata of the component mod_dav. The manipulation leads to input validation. This vulnerability is traded as CVE-2013-6438. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Apache HTTP Server up to 2.0.33 (Web Server). It has been rated as problematic. This issue affects the function dav_xml_get_cdata of the component mod_dav. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

The dav_xml_get_cdata function in main/util.c in the mod_dav module in the Apache HTTP Server before 2.4.8 does not properly remove whitespace characters from CDATA sections, which allows remote attackers to cause a denial of service (daemon crash) via a crafted DAV WRITE request.

The weakness was shared 03/18/2014 by Amin Tora (Neustar) (Website). The advisory is shared at ubuntu.com. The identification of this vulnerability is CVE-2013-6438 since 11/04/2013. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 73248 (Slackware 14.0 / 14.1 / current : httpd (SSA:2014-086-02)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Slackware 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 to version 2.0.34 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (73248), SecurityFocus (BID 66303†) and Secunia (SA59345†). The entries VDB-4353, VDB-4352, VDB-4548 and VDB-4582 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 73248
Nessus Name: Slackware 14.0 / 14.1 / current : httpd (SSA:2014-086-02)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 841759
OpenVAS Name: Ubuntu Update for apache2 USN-2152-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: HTTP Server 2.0.34

Timelineinfo

11/04/2013 🔍
03/17/2014 +133 days 🔍
03/18/2014 +1 days 🔍
03/18/2014 +0 days 🔍
03/28/2014 +10 days 🔍
03/31/2014 +3 days 🔍
06/26/2014 +87 days 🔍
03/24/2015 +271 days 🔍
02/03/2022 +2508 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: USN-2152-1
Researcher: Amin Tora (Neustar)
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-6438 (🔍)
GCVE (CVE): GCVE-0-2013-6438
GCVE (VulDB): GCVE-100-66689

OVAL: 🔍
IAVM: 🔍

SecurityFocus: 66303 - Apache HTTP Server Multiple Denial of Service Vulnerabilities
Secunia: 59345 - Red Hat update for Red Hat JBoss Enterprise Web Server, Moderately Critical

See also: 🔍

Entryinfo

Created: 03/24/2015 15:54
Updated: 02/03/2022 19:49
Changes: 03/24/2015 15:54 (75), 04/24/2019 00:41 (8), 02/03/2022 19:49 (3)
Complete: 🔍
Cache ID: 216:E9F:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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