Bug 711480 (CVE-2020-1734)

Summary:	app-admin/ansible: shell enabled by default in a pipe lookup plugin subprocess (CVE-2020-1734)
Product:	Gentoo Security	Reporter:	filip ambroz <filip.ambroz>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	RESOLVED INVALID
Severity:	minor	CC:	ajak, calchan, chainsaw, monsieurp, prometheanfire
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	https://github.com/ansible/ansible/issues/67792
Whiteboard:	B3 [upstream/ebuild cve]
Package list:		Runtime testing required:	---

Description filip ambroz 2020-03-04 08:06:50 UTC

A flaw was found in the pipe lookup plugin of ansible. Arbitrary commands can be run, when the pipe lookup plugin uses subprocess.Popen() with shell=True, by overwriting ansible facts and the variable is not escaped by quote plugin. An attacker could take advantage and run arbitrary commands by overwriting the ansible facts.

References:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-1734
https://nvd.nist.gov/vuln/detail/CVE-2020-1734
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1734
https://security-tracker.debian.org/tracker/CVE-2020-1734
https://www.suse.com/security/cve/CVE-2020-1734/
https://people.canonical.com/~ubuntu-security/cve/2020/CVE-2020-1734.html

Comment 1 John Helmert III archtester

2020-06-19 01:15:45 UTC

Upstream says this is intended behavior and must be prevented by the playbook author.

https://github.com/ansible/ansible/issues/67792#issuecomment-607421605