Trustwave ModSecurity 2.7.0/2.7.1/2.7.2 XML Parser input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

A vulnerability was found in Trustwave ModSecurity 2.7.0/2.7.1/2.7.2. It has been classified as critical. Affected is an unknown code block of the component XML Parser. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality. CVE summarizes:

ModSecurity before 2.7.3 allows remote attackers to read arbitrary files, send HTTP requests to intranet servers, or cause a denial of service (CPU and memory consumption) via an XML external entity declaration in conjunction with an entity reference, aka an XML External Entity (XXE) vulnerability.

The weakness was published 03/22/2013 by Timur Yunusov and Alexey Osipov with Positive Technologies Research Team as not defined mailinglist post (oss-sec). The advisory is shared for download at seclists.org. The public release has been coordinated with the vendor. This vulnerability is traded as CVE-2013-1915 since 02/19/2013. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are unknown but a private exploit is available.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 67127 (ModSecurity < 2.7.3 XML External Entity (XXE) Data Parsing Arbitrary File Disclosure), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Firewalls. The commercial vulnerability scanner Qualys is able to test this issue with plugin 166401 (OpenSuSE Security Update for apache2-mod_security2 (openSUSE-SU-2013:1342-1)).

Upgrading to version 2.7.3 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. 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 X-Force (83170) and Tenable (67127). Similar entries are available at 6798, 8314, 8904 and 61374.

Productinfo

Vendor

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

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

Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 67127
Nessus Name: ModSecurity < 2.7.3 XML External Entity (XXE) Data Parsing Arbitrary File Disclosure
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 892659
OpenVAS Name: Debian Security Advisory DSA 2659-1 (libapache-mod-security - XML external entity processing vulnerability
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: ModSecurity 2.7.3
Patch: github.com

Timelineinfo

02/19/2013 🔍
03/22/2013 +31 days 🔍
03/22/2013 +0 days 🔍
03/28/2013 +6 days 🔍
03/28/2013 +0 days 🔍
04/02/2013 +5 days 🔍
04/08/2013 +6 days 🔍
04/23/2013 +15 days 🔍
04/25/2013 +2 days 🔍
07/02/2013 +68 days 🔍
05/06/2021 +2865 days 🔍

Sourcesinfo

Advisory: seclists.org
Researcher: Timur Yunusov, Alexey Osipov
Organization: Positive Technologies Research Team
Status: Not defined
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2013-1915 (🔍)
OVAL: 🔍

X-Force: 83170
Vulnerability Center: 39310 - ModSecurity 2.7.2 Improper XML Parsing Allows Remote Information Disclosure Vulnerability via a Crafted XML File, Medium
SecurityFocus: 58810 - ModSecurity XML External Entity Information Disclosure Vulnerability
Secunia: 52847 - ModSecurity XML External Entity Processing Vulnerability, Moderately Critical
OSVDB: 91948

scip Labs: https://www.scip.ch/en/?labs.20130913
See also: 🔍

Entryinfo

Created: 04/08/2013 10:33
Updated: 05/06/2021 17:44
Changes: 04/08/2013 10:33 (83), 04/28/2017 09:02 (4), 05/06/2021 17:44 (3)
Complete: 🔍
Committer: olku

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