Bug 1094620 – CVE-2014-3243 SOAPpy: XML entity expansion (billion laughs) flaw

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Bug 1094620 - (CVE-2014-3243) CVE-2014-3243 SOAPpy: XML entity expansion (billion laughs) flaw

Summary:	CVE-2014-3243 SOAPpy: XML entity expansion (billion laughs) flaw

Status:	NEW

Aliases:	CVE-2014-3243

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
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Assigned To:	Red Hat Product Security
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URL:
Whiteboard:	impact=moderate,public=20140422,repor...
Keywords:	Security

Depends On:	1178862 1178863
Blocks:	1094623
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Reported:	2014-05-06 03:19 EDT by Murray McAllister
Modified:	2015-03-04 11:11 EST (History)
CC List:	4 users (show)

See Also:
Fixed In Version:	SOAPpy 0.12.6
Doc Type:	Bug Fix
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Description Murray McAllister 2014-05-06 03:19:55 EDT

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 03:21:11 EDT

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 2014-05-06 20:56:31 EDT

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 08:06:44 EST

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 10:01:42 EST

Created SOAPpy tracking bugs for this issue:

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

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