Bug 1875241 (CVE-2020-12415)

Summary:	CVE-2020-12415 Mozilla: AppCache manifest poisoning due to url encoded character processing
Product:	[Other] Security Response	Reporter:	Doran Moppert <dmoppert>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	cschalle, gecko-bugs-nobody, jhorak, stransky
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	thunderbird 78	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-09-03 07:17:44 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:
Bug Blocks:	1850728

Description Doran Moppert 2020-09-03 06:07:20 UTC

When `%2F` was present in a manifest URL, Thunderbird's AppCache behavior may have become confused and allowed a manifest to be served from a subdirectory. This could cause the appcache to be used to service requests for the top level directory.



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2020-29/#CVE-2020-12415

Comment 1 Doran Moppert 2020-09-03 06:07:32 UTC

Acknowledgments:

Name: the Mozilla project
Upstream: Kevin Higgs

Comment 2 Product Security DevOps Team 2020-09-03 07:17:44 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-12415