Bug 1173633 – VUL-0: CVE-2020-14940: tuxguitar: improper configuration of XML parsers might lead to XXE while loading GP6 (.gpx) and GP7 (.gp) tablature files

Bug 1173633 - (CVE-2020-14940) VUL-0: CVE-2020-14940: tuxguitar: improper configuration of XML parsers might lead to XXE while loading GP6 (.gpx) and GP7 (.gp) tablature files

(CVE-2020-14940)
Summary:	VUL-0: CVE-2020-14940: tuxguitar: improper configuration of XML parsers might...

Status:	NEW

Classification:	openSUSE
Product:	openSUSE Distribution
Classification:	openSUSE
Component:	Security
Version:	Leap 15.1
Hardware:	Other Other

Priority:	P3 - Medium Severity: Normal (vote)
Target Milestone:	---
Assigned To:	Mindaugas Baranauskas
QA Contact:	Security Team bot

URL:	https://smash.suse.de/issue/262182/
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Reported:	2020-07-02 13:49 UTC by Alexandros Toptsoglou
Modified:	2020-07-04 16:34 UTC (History)
CC List:	0 users

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Found By:	Security Response Team
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Description Alexandros Toptsoglou 2020-07-02 13:49:18 UTC

CVE-2020-14940

An issue was discovered in io/gpx/GPXDocumentReader.java in TuxGuitar 1.5.4. It
uses misconfigured XML parsers, leading to XXE while loading GP6 (.gpx) and GP7
(.gp) tablature files.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-14940
http://people.canonical.com/~ubuntu-security/cve/2020/CVE-2020-14940.html
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14940
https://logicaltrust.net/blog/2020/06/tuxguitar.html
https://sourceforge.net/p/tuxguitar/bugs/126/

Comment 1 Mindaugas Baranauskas 2020-07-04 16:34:09 UTC

openSUSE has Tuxguitar 1.4 instead of 1.5.4

According to OWASP XXE Prevention Cheat Sheet <https://cheatsheetseries.owasp.org/cheatsheets/XML_External_Entity_Prevention_Cheat_Sheet.html>, this problem can be solved by proper configuration of a parser:

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
String FEATURE = "http://apache.org/xml/features/disallow-doctype-decl";
dbf.setFeature(FEATURE, true);

However I don't know where to patch Tuxguitar...