Bug 1659975 (CVE-2018-20167)

Summary:	CVE-2018-20167 terminology: Incorrect escaping of crafted files results in code execution
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	cse.cem+redhatbugz, dingyichen
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	terminology 1.3.1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:44:02 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1659977
Bug Blocks:

Description Andrej Nemec 2018-12-17 10:03:38 UTC

Terminology before 1.3.1 allows Remote Code Execution because popmedia is mishandled, as demonstrated by an unsafe "cat README.md" command when \e}pn is used. A popmedia control sequence can allow the malicious execution of executable file formats registered in the X desktop share MIME types (/usr/share/applications). The control sequence defers unknown file types to the handle_unknown_media() function, which executes xdg-open against the filename specified in the sequence. The use of xdg-open for all unknown file types allows executable file formats with a registered shared MIME type to be executed. An attacker can achieve remote code execution by introducing an executable file and a plain text file containing the control sequence through a fake software project (e.g., in Git or a tarball). When the control sequence is rendered (such as with cat), the executable file will be run.

References:

https://www.enlightenment.org/news/2018-12-16-terminology-1.3.1
https://phab.enlightenment.org/T7504https://phab.enlightenment.org/T7504
https://phab.enlightenment.org/rTRM1ac204da9148e7bccb1b5f34b523e2094dfc39e2

Comment 1 Andrej Nemec 2018-12-17 10:03:56 UTC

Created terminology tracking bugs for this issue:

Affects: fedora-all [bug 1659977]

Comment 2 Product Security DevOps Team 2019-06-10 10:44:02 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.