Bug 1509303 (CVE-2017-16228)

Summary:	CVE-2017-16228 python-dulwich: Setting SSH arguments from untrusted URLs allows code execution
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	apevec, chrisw, jjoyce, jschluet, kbasil, lhh, lpeer, mail, markmc, mburns, rbryant, sclewis, slinaber, tdecacqu
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	python-dulwich 0.18.5	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-11-27 21:08:04 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:	1509304, 1509305
Bug Blocks:	1509317

Description Adam Mariš 2017-11-03 13:52:20 UTC

Dulwich before 0.18.5, when an SSH subprocess is used, allows remote attackers to execute arbitrary commands via an ssh URL with an initial dash character in the hostname, a related issue to CVE-2017-9800, CVE-2017-12836, CVE-2017-12976, CVE-2017-1000116, and CVE-2017-1000117.

Upstream patch:

https://www.dulwich.io/code/dulwich/commit/7116a0cbbda571f7dac863f4b1c00b6e16d6d8d6/

Comment 1 Adam Mariš 2017-11-03 13:52:32 UTC

Created python-dulwich tracking bugs for this issue:

Affects: epel-all [bug 1509304]
Affects: fedora-all [bug 1509305]

Comment 2 Joshua Padman 2017-11-17 01:21:42 UTC

OpenStack reno is the package that requires python-dulwich. However, it does not use the vulnerable function within python-dulwich. The functionality used by reno is for manipulating git repositories on disk.