Bug 1094620 (CVE-2014-3243)

Summary:	CVE-2014-3243 SOAPpy: XML entity expansion (billion laughs) flaw
Product:	[Other] Security Response	Reporter:	Murray McAllister <mmcallis>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	carnil, jkurik, pingou, python-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	SOAPpy 0.12.6	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:32:59 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:	1178862, 1178863
Bug Blocks:	1094623

Description Murray McAllister 2014-05-06 07:19:55 UTC

An entity expansion (billion laughs) flaw was found in SOAPpy. A remote attacker could send a specially-crafted request to an application that uses SOAPpy, leading to excessive CPU and memory consumption.

Original report: http://www.pnigos.com/?p=260

CVE request: http://seclists.org/oss-sec/2014/q2/249

Note that SOAPpy is not actively supported by upstream anymore.

Comment 1 Murray McAllister 2014-05-06 07:21:11 UTC

I've not filed a Fedora or EPEL bug for this (or for bug 1094619), as there is no patch yet from what I can see

Comment 2 Murray McAllister 2014-05-07 00:56:31 UTC

MITRE assigned CVE-2014-3243 to this issue:

http://www.openwall.com/lists/oss-security/2014/05/06/9

Comment 5 Tomas Hoger 2015-01-05 13:06:44 UTC

This was fixed upstream in 0.12.6, via the following commit:

https://github.com/kiorky/SOAPpy/commit/64125a2

This commit introduces a dependency on the defusedxml module (the python-defusedxml package in Fedora).  It should be possible to create a smaller fix that e.g. disables entity expansion and DTD processing unconditionally.

It also only fixes this issue for the server, leaving SOAPpy clients exposed:

https://github.com/kiorky/SOAPpy/issues/17

Comment 6 Tomas Hoger 2015-01-05 15:01:42 UTC

Created SOAPpy tracking bugs for this issue:

Affects: fedora-all [bug 1178862]
Affects: epel-5 [bug 1178863]