Bug 1204889 (CVE-2014-9706)

Summary:	CVE-2014-9706 python-dulwich: arbitrary files allowed to be commited, leading to code execution
Product:	[Other] Security Response	Reporter:	Vasyl Kaigorodov <vkaigoro>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	erik, jrusnack, mail
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-02-22 15:26:40 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:	1204890, 1204891
Bug Blocks:

Description Vasyl Kaigorodov 2015-03-23 17:08:46 UTC

dulwich happily clones a repository which contains commit with invalid
paths, say .git/hooks/pre-commit, and thus allowing execution of code
on subsequent commits.

----cut---------cut---------cut---------cut---------cut---------cut-----
dummy () sid:~$ python PoC.py 
dummy () sid:~$ dulwich clone PoC.git foo
Counting objects: 5, done.
Compressing objects: 100% (2/2), done.
Total 5 (delta 0), reused 5 (delta 0)
Checking out HEADdummy () sid:~$ cd foo/
dummy () sid:~/foo$ git commit -m "test" --allow-empty
You just got cracked! (not really but you could have been!)
[master 9588153] test
dummy () sid:~/foo$ ls -l /tmp/cracked 
-rw-r--r-- 1 dummy dummy 0 Mar 21 10:24 /tmp/cracked
dummy () sid:~/foo$
----cut---------cut---------cut---------cut---------cut---------cut-----

Upstream (Jelmer Vernooij) has fixed this with commit

https://git.samba.org/?p=jelmer/dulwich.git;a=commitdiff;h=091638be3c89f46f42c3b1d57dc1504af5729176

Comment 1 Vasyl Kaigorodov 2015-03-23 17:09:48 UTC

Created python-dulwich tracking bugs for this issue:

Affects: fedora-all [bug 1204890]
Affects: epel-all [bug 1204891]

Comment 2 Fedora Update System 2015-04-09 16:57:59 UTC

python-dulwich-0.10.0-1.el6 has been pushed to the Fedora EPEL 6 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 3 Fedora Update System 2015-04-09 16:59:16 UTC

python-dulwich-0.10.0-1.el7 has been pushed to the Fedora EPEL 7 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2015-04-10 07:28:11 UTC

python-dulwich-0.10.0-1.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2015-04-10 07:31:41 UTC

python-dulwich-0.10.0-1.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2015-04-21 18:52:53 UTC

python-dulwich-0.10.0-1.fc22 has been pushed to the Fedora 22 stable repository.  If problems still persist, please make note of it in this bug report.