Bug 1030840

Summary:	pound: TLS CRIME attack
Product:	[Other] Security Response	Reporter:	Ratul Gupta <ratulg>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bperkins, manuel.wolfshant, zaitcev
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:	2015-07-05 19:43:29 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:	1030843, 1030844
Bug Blocks:

Description Ratul Gupta 2013-11-15 09:38:25 UTC

Pound, a reverse proxy, load balancer and HTTPS front-end for Web servers, is found to have the TLS compression enabled, which makes possible a practical attack CRIME, and there is no option to disable the TLS compression.

Some explanations and a possible patch is given here:
https://community.qualys.com/blogs/securitylabs/2012/09/14/crime-information-leakage-attack-against-ssltls

References:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=727197

Commit:
https://github.com/goochjj/pound/commit/a0c52c542ca9620a96750f9877b26bf4c84aef1b

Comment 1 Ratul Gupta 2013-11-15 09:39:53 UTC

Created Pound tracking bugs for this issue:

Affects: fedora-all [bug 1030843]
Affects: epel-all [bug 1030844]

Comment 2 Tomas Hoger 2013-11-15 09:55:58 UTC

This should not be an issue in Fedora or EPEL any more.  OpenSSL packages in Fedora and Red Hat Enterprise Linux 5 and 6 used to default to having compression enabled by default, but that was changed and compression it not enabled by default any more:

http://pkgs.fedoraproject.org/cgit/openssl.git/commit/?id=169c3a0
https://rhn.redhat.com/errata/RHSA-2013-0587.html

There is an option to enable compression by setting OPENSSL_DEFAULT_ZLIB environment variable.

If using older openssl packages, compression can be disabled using OPENSSL_NO_DEFAULT_ZLIB environment variable - see bug 857051 comment 5 for further details.

Comment 4 manuel wolfshant 2015-07-05 19:43:29 UTC

This was solved 10 months ago. Closing.