Bug 1371799 (CVE-2016-6298)

Summary:	CVE-2016-6298 jwcrypto: million messages attack vulnerability
Product:	[Other] Security Response	Reporter:	Martin Prpič <mprpic>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	cheimes, puiterwijk, ssorce
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	jwcrypto 0.3	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:57:59 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:	1371800
Bug Blocks:

Description Martin Prpič 2016-08-31 07:10:05 UTC

The jwcrypto implementation of the RSA1_5 algorithm is vulnerable to the Million Message Attack described in RFC 3128.

A timing attack can be leveraged against the implementation to detect when a chosed ciphertext generates a valid header and padding because invalid headr/padding generates a code exception and cryptographic operations are terminated earlier resulting in measurably faster processing over the network.

Upstream issue:

https://github.com/latchset/jwcrypto/issues/65

Upstream patch:

https://github.com/latchset/jwcrypto/pull/66

Comment 1 Martin Prpič 2016-08-31 07:10:16 UTC

Acknowledgments:

Name: Dennis Detering

Comment 2 Martin Prpič 2016-08-31 07:10:33 UTC

Created python-jwcrypto tracking bugs for this issue:

Affects: fedora-all [bug 1371800]

Comment 3 Fedora Update System 2016-09-05 17:52:06 UTC

python-jwcrypto-0.3.2-1.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2016-09-10 01:48:28 UTC

python-jwcrypto-0.3.2-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2016-09-10 05:20:21 UTC

python-jwcrypto-0.3.2-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 6 Product Security DevOps Team 2019-06-08 02:57:59 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.