Bug 1277488

Summary:	python-pycurl: use-after-free vulnerability in HTTPPOST when using FORM_BUFFERPTR with Unicode string
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	kdudka, slawomir
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	python-pycurl 7.19.5.2	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-12-01 13:52:29 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:	1277489, 1277490
Bug Blocks:	1277491

Description Adam Mariš 2015-11-03 13:10:22 UTC

A use-after-free vulnerability was found in Curl object's HTTPPOST setopt when a Unicode value is passed as a value with a FORM_BUFFERPTR. The str object created from the passed in unicode object would have its buffer used but the unicode object would be stored instead of the str object.

Upstream patch:

https://github.com/clintclayton/pycurl/commit/2a743674dcf152beaaf6adaddb1ef51b18d1fffe

Comment 1 Adam Mariš 2015-11-03 13:10:50 UTC

Created python-pycurl tracking bugs for this issue:

Affects: fedora-all [bug 1277489]
Affects: epel-5 [bug 1277490]

Comment 2 Kamil Dudka 2015-11-03 18:22:31 UTC

(In reply to Adam Mariš from comment #1)
> Affects: epel-5 [bug 1277490]

How are you confirming that epel-5 is affected?

I see no CURLFORM_BUFFERPTR handling in python-pycurl-7.15.5.1-4.el5.

Comment 4 Tomas Hoger 2015-12-01 13:52:29 UTC

CURLFORM_BUFFERPTR support was only introduced in pycurl version 7.19.3.  The versions used in Red Hat Enterprise Linux 7 and earlier are 7.19.0 or earlier.  Therefore, no version currently in Red Hat Enterprise Linux is affected by this issue.  Problem was fixed upstream 7.19.5.2.