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XML External Entity injection in FitNesse plugin for Jenkins



Published: 2020-02-13
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2020-2120
CWE ID CWE-611
Exploitation vector Network
Public exploit N/A
Vulnerable software
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FitNesse
Web applications / Modules and components for CMS

Vendor Jenkins

Security Advisory

This security advisory describes one medium risk vulnerability.

1) XML External Entity injection

Severity: Medium

CVSSv3: 6.6 [CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-2120

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied XML input. A remote user able to control the input files for its post-build step can pass a specially crafted XML code to the affected application and view contents of arbitrary files 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 updates from vendor's website.

Vulnerable software versions

FitNesse: 1.0, 1.1, 1.2, 1.3, 1.3.1, 1.4, 1.5, 1.6, 1.7, 1.8, 1.8.1, 1.9, 1.10, 1.11, 1.12, 1.13, 1.14, 1.15, 1.16, 1.24, 1.25, 1.26, 1.27, 1.28, 1.29, 1.30

CPE External links

http://www.openwall.com/lists/oss-security/2020/02/12/3
https://jenkins.io/security/advisory/2020-02-12/#SECURITY-1751

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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



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