#VU22545 XML External Entity injection


Published: 2019-11-06 | Updated: 2020-01-23

Vulnerability identifier: #VU22545

Vulnerability risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-12415

CWE-ID: CWE-611

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache POI
Server applications / Other server solutions

Vendor: Apache Foundation

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied XML input when using the tool XSSFExportToXml to convert user-provided Microsoft Excel documents. A remote attacker can pass a specially crafted XML code to the affected application and read files from the local filesystem or from internal network resources on the system or initiate requests to external systems.

Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Apache POI: 0.1 - 4.1.0


CPE

External links
http://lists.apache.org/thread.html/13a54b6a03369cfb418a699180ffb83bd727320b6ddfec198b9b728e@%3Cannounce.apache.org%3E
http://lists.apache.org/thread.html/2ac0327748de0c2b3c1c012481b79936797c711724e0b7da83cf564c@%3Cuser.tika.apache.org%3E
http://lists.apache.org/thread.html/895164e03a3c327449069e2fd6ced0367561878b3ae6a8ec740c2007@%3Cuser.tika.apache.org%3E


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability