Bug 1659975 (CVE-2018-20167) - CVE-2018-20167 terminology: Incorrect escaping of crafted files results in code execution
Summary: CVE-2018-20167 terminology: Incorrect escaping of crafted files results in co...
Alias: CVE-2018-20167
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1659977
TreeView+ depends on / blocked
Reported: 2018-12-17 10:03 UTC by Andrej Nemec
Modified: 2019-09-29 15:04 UTC (History)
2 users (show)

Fixed In Version: terminology 1.3.1
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2019-06-10 10:44:02 UTC

Attachments (Terms of Use)

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.



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.

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