Bug 1903443 (CVE-2020-26970)

Summary:	CVE-2020-26970 Mozilla: Stack overflow due to incorrect parsing of SMTP server response codes
Product:	[Other] Security Response	Reporter:	Doran Moppert <dmoppert>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	cschalle, erack, gecko-bugs-nobody, jhorak, stransky, tpopela
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	thunderbird 78.5.1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-12-14 12:47:08 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:	1903436, 1903437, 1903438, 1903439, 1903440, 1903441, 1903442
Bug Blocks:	1903434

Description Doran Moppert 2020-12-02 04:44:04 UTC

When reading SMTP server status codes, Thunderbird writes an integer value to a position on the stack that is intended to contain just one byte. Depending on processor architecture and stack layout, this leads to stack corruption that may be exploitable.



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2020-53/#CVE-2020-26970

Comment 1 Doran Moppert 2020-12-02 04:44:08 UTC

Acknowledgments:

Name: the Mozilla project
Upstream: Chiaki Ishikawa

Comment 2 errata-xmlrpc 2020-12-14 12:21:31 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:5398 https://access.redhat.com/errata/RHSA-2020:5398

Comment 3 errata-xmlrpc 2020-12-14 12:25:41 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2020:5399 https://access.redhat.com/errata/RHSA-2020:5399

Comment 4 Product Security DevOps Team 2020-12-14 12:47:08 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-2020-26970

Comment 5 errata-xmlrpc 2020-12-14 12:49:52 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:5400 https://access.redhat.com/errata/RHSA-2020:5400

Comment 8 errata-xmlrpc 2020-12-21 12:31:18 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Extended Update Support

Via RHSA-2020:5644 https://access.redhat.com/errata/RHSA-2020:5644

Comment 9 errata-xmlrpc 2020-12-21 13:35:40 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

Via RHSA-2020:5645 https://access.redhat.com/errata/RHSA-2020:5645