Bug 1839815 (CVE-2020-12872)

Summary:	CVE-2020-12872 yaws: yaws_config.erl loads obsolete TLS ciphers
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	devel, extras-orphan, filip, lkundrak
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-05-25 21:15:22 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:	1839816, 1839817
Bug Blocks:

Description Pedro Sampaio 2020-05-25 16:26:51 UTC

yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks. 

References:

https://github.com/erlyaws/yaws/blob/c0fd79f17d52628fcec527da7fa3e788c283c445/src/yaws_config.erl#L2068-L2075
https://github.com/erlyaws/yaws/releases
https://medium.com/@charlielabs101/cve-2020-12872-df315411aa70
https://sweet32.info/

Comment 1 Pedro Sampaio 2020-05-25 16:27:21 UTC

Created yaws tracking bugs for this issue:

Affects: epel-7 [bug 1839817]
Affects: fedora-all [bug 1839816]

Comment 2 Product Security DevOps Team 2020-05-25 21:15:22 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.