#VU26714 XML External Entity injection in Code Coverage API - CVE-2020-2172

Vulnerability identifier: #VU26714

Vulnerability risk: Medium

CVSSv4.0: 5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-2172

CWE-ID: CWE-611

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Code Coverage API
Web applications / Modules and components for CMS

Vendor: Jenkins

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. A remote authenticated attacker able to control the input files for the "Publish Coverage Report" 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

Code Coverage API: 1.0.0 - 1.1.4

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External links
https://www.openwall.com/lists/oss-security/2020/04/07/3
https://jenkins.io/security/advisory/2020-04-07/#SECURITY-1699

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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.