Bug 1204829

Summary:	PyYAML: assert failure when processing wrapped strings
Product:	[Other] Security Response	Reporter:	Martin Prpič <mprpic>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abaron, aortega, apevec, ayoung, bgollahe, bhu, bkearney, ceph-eng-bugs, chrisw, cperry, dallan, esammons, ggainey, gkotton, iboverma, jeckersb, jmatthew, jorton, jross, jrusnack, kanderso, lhh, lpeer, markmc, matt, mcressma, meissner, mmaslano, mrg-program-list, rbryant, sclewis, sisharma, srevivo, taw, thomas, tjay, tsanders, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	An assertion failure was found in the way the PyYAML library parsed wrapped strings. An attacker able to load specially crafted YAML input into an application using PyYAML could cause the application to crash.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-11-03 21:15:53 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:	1204830, 1204832, 1204833
Bug Blocks:	1204835

Description Martin Prpič 2015-03-23 15:03:02 UTC

An assertion failure was found in the way the PyYAML library parsed wrapped strings. An attacker able to load specially crafted YAML input into an application using PyYAML could cause the application to crash.

This is the same flaw as CVE-2014-9130 but in the Python implementation of the YAML library. MITRE recommends it should be a separate issue:

http://seclists.org/oss-sec/2014/q4/854

Upstream patch:

https://bitbucket.org/xi/pyyaml/commits/ddf211a41bb231c365fece5599b7e484e6dc33fc

Comment 1 Martin Prpič 2015-03-23 15:04:20 UTC

Created PyYAML tracking bugs for this issue:

Affects: fedora-all [bug 1204830]
Affects: epel-5 [bug 1204832]

Comment 2 Martin Prpič 2015-03-23 15:04:24 UTC

Created python26-PyYAML tracking bugs for this issue:

Affects: epel-5 [bug 1204833]

Comment 4 Fedora Update System 2015-04-05 14:33:26 UTC

PyYAML-3.11-7.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 2015-04-05 14:35:48 UTC

PyYAML-3.10-11.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 2015-04-09 16:55:59 UTC

PyYAML-3.09-11.el5 has been pushed to the Fedora EPEL 5 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 7 Fedora Update System 2015-04-21 18:36:20 UTC

PyYAML-3.11-7.fc22 has been pushed to the Fedora 22 stable repository.  If problems still persist, please make note of it in this bug report.