Bug 1896306 (CVE-2020-26950)

Summary: CVE-2020-26950 Mozilla: Write side effects in MCallGetProperty opcode not accounted for
Product: [Other] Security Response Reporter: Doran Moppert <dmoppert>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: urgent Docs Contact:
Priority: urgent    
Version: unspecifiedCC: cschalle, erack, gecko-bugs-nobody, jhorak, stransky, tpopela
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: firefox 82.0.3, firefox 78.4.1, thunderbird 78.4.2 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-11-12 17:28:31 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: 1896268, 1896269, 1896270, 1896271, 1896272, 1896273, 1896274, 1896290, 1896291, 1896292, 1896293, 1896294, 1896295, 1896297    
Bug Blocks: 1896266    

Description Doran Moppert 2020-11-10 09:18:38 UTC
In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition.



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2020-49/#CVE-2020-26950

Comment 1 Doran Moppert 2020-11-10 09:18:43 UTC
Acknowledgments:

Name: the Mozilla project
Upstream: 360政企安全漏洞研究院 in Tianfu Cup 2020 International Cybersecurity Contest

Comment 9 errata-xmlrpc 2020-11-12 14:38:58 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:5100 https://access.redhat.com/errata/RHSA-2020:5100

Comment 10 errata-xmlrpc 2020-11-12 14:57:48 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:5099 https://access.redhat.com/errata/RHSA-2020:5099

Comment 11 errata-xmlrpc 2020-11-12 15:05:58 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2020:5104 https://access.redhat.com/errata/RHSA-2020:5104

Comment 12 Product Security DevOps Team 2020-11-12 17:28:31 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-2020-26950

Comment 26 errata-xmlrpc 2020-11-17 16:34:02 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Extended Update Support

Via RHSA-2020:5135 https://access.redhat.com/errata/RHSA-2020:5135

Comment 27 errata-xmlrpc 2020-11-17 17:20:34 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

Via RHSA-2020:5138 https://access.redhat.com/errata/RHSA-2020:5138

Comment 28 errata-xmlrpc 2020-11-17 19:15:40 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2020:5139 https://access.redhat.com/errata/RHSA-2020:5139

Comment 30 errata-xmlrpc 2020-11-18 14:09:18 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:5146 https://access.redhat.com/errata/RHSA-2020:5146

Comment 36 errata-xmlrpc 2020-11-23 08:39:42 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

Via RHSA-2020:5167 https://access.redhat.com/errata/RHSA-2020:5167

Comment 37 errata-xmlrpc 2020-11-23 08:46:05 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Extended Update Support

Via RHSA-2020:5166 https://access.redhat.com/errata/RHSA-2020:5166

Comment 38 errata-xmlrpc 2020-11-23 08:57:43 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2020:5162 https://access.redhat.com/errata/RHSA-2020:5162

Comment 39 errata-xmlrpc 2020-11-23 09:01:25 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2020:5164 https://access.redhat.com/errata/RHSA-2020:5164

Comment 40 errata-xmlrpc 2020-11-23 09:11:28 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:5163 https://access.redhat.com/errata/RHSA-2020:5163