Bug 803500 (CVE-2011-4940)

Summary:	CVE-2011-4940 python: potential XSS in SimpleHTTPServer's list_directory()
Product:	[Other] Security Response	Reporter:	Vincent Danen <vdanen>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	dmalcolm, jlieskov, katzj
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:	2012-07-18 10:17:27 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:	805382, 805383, 805384, 805385, 808303, 808304, 808305
Bug Blocks:	790031

Description Vincent Danen 2012-03-14 20:23:45 UTC

A flaw was reported [1] in Python's SimpleHTTPServer's list_directory() function.  Due to a missing charset parameter, if a user were to connect to SimpleHTTPServer using IE7, which engages in encoding-sniffing and can be tricked into interpretting the output as UTF7.  Because of this, an attacker could hide <script> tags in UTF7-encoded characters which do not get quoted by cgi.encode(), allowing XSS attacks.

This has been corrected upstream in version 2.6.7rc2 [2], 2.5.6c1 [3].  It may be fixed in 2.7 as well, but I was unable to find a commit to match it against.

[1] http://bugs.python.org/issue11442
[2] http://svn.python.org/view/python/branches/release26-maint/Lib/SimpleHTTPServer.py?r1=66717&r2=88831&view=patch
[3] http://svn.python.org/view/python/branches/release25-maint/Lib/SimpleHTTPServer.py?r1=53148&r2=88815&view=patch

Comment 1 Kurt Seifried 2012-03-15 04:34:30 UTC

Added CVE as per http://www.openwall.com/lists/oss-security/2012/03/15/1

Comment 3 Huzaifa S. Sidhpurwala 2012-03-30 05:47:25 UTC

Created python tracking bugs for this issue

Affects: fedora-all [bug 808303]

Comment 4 Huzaifa S. Sidhpurwala 2012-03-30 05:47:29 UTC

Created python26 tracking bugs for this issue

Affects: epel-5 [bug 808305]

Comment 5 Huzaifa S. Sidhpurwala 2012-03-30 05:47:32 UTC

Created python3 tracking bugs for this issue

Affects: fedora-all [bug 808304]

Comment 6 Tomas Hoger 2012-04-18 15:18:29 UTC

(In reply to comment #0)
> http://svn.python.org/view/python/branches/release26-maint/Lib/SimpleHTTPServer.py?r1=66717&r2=88831&view=patch
> http://svn.python.org/view/python/branches/release25-maint/Lib/SimpleHTTPServer.py?r1=53148&r2=88815&view=patch

A little nicer commit links:

http://svn.python.org/view?view=revision&revision=88831
http://hg.python.org/cpython/rev/e9724d7abbc2

Comment 7 errata-xmlrpc 2012-06-18 12:32:49 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2012:0744 https://rhn.redhat.com/errata/RHSA-2012-0744.html

Comment 8 errata-xmlrpc 2012-06-18 12:42:57 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2012:0745 https://rhn.redhat.com/errata/RHSA-2012-0745.html

Comment 9 Jan Lieskovsky 2012-06-26 12:35:12 UTC

*** Bug 835496 has been marked as a duplicate of this bug. ***