Bug 1908024 (CVE-2020-26974) - CVE-2020-26974 Mozilla: Incorrect cast of StyleGenericFlexBasis resulted in a heap use-after-free
Summary: CVE-2020-26974 Mozilla: Incorrect cast of StyleGenericFlexBasis resulted in a...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-26974
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1906545 1906546 1906547 1906548 1906549 1906550 1906553 1906554 1906555 1906556 1906557 1906558
Blocks: 1906543
TreeView+ depends on / blocked
 
Reported: 2020-12-15 17:45 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-02-16 18:43 UTC (History)
6 users (show)

Fixed In Version: firefox 78.6, thunderbird 78.6
Doc Type: If docs needed, set a value
Doc Text:
The Mozilla Foundation Security Advisory describes this flaw as: When `flex-basis` was used on a table wrapper, a `StyleGenericFlexBasis` object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash.
Clone Of:
Environment:
Last Closed: 2020-12-16 10:18:44 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:5561 0 None None None 2020-12-16 08:22:11 UTC
Red Hat Product Errata RHSA-2020:5562 0 None None None 2020-12-16 07:54:58 UTC
Red Hat Product Errata RHSA-2020:5563 0 None None None 2020-12-16 08:02:00 UTC
Red Hat Product Errata RHSA-2020:5564 0 None None None 2020-12-16 07:52:32 UTC
Red Hat Product Errata RHSA-2020:5565 0 None None None 2020-12-16 08:14:37 UTC
Red Hat Product Errata RHSA-2020:5618 0 None None None 2020-12-17 15:08:56 UTC
Red Hat Product Errata RHSA-2020:5622 0 None None None 2020-12-17 16:18:33 UTC
Red Hat Product Errata RHSA-2020:5624 0 None None None 2020-12-17 16:22:49 UTC
Red Hat Product Errata RHSA-2020:5644 0 None None None 2020-12-21 12:31:35 UTC
Red Hat Product Errata RHSA-2020:5645 0 None None None 2020-12-21 13:35:52 UTC

Description Guilherme de Almeida Suckevicz 2020-12-15 17:45:29 UTC 
When `flex-basis` was used on a table wrapper, a `StyleGenericFlexBasis` object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash.



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2020-55/#CVE-2020-26974
Comment 1 Guilherme de Almeida Suckevicz 2020-12-15 17:45:33 UTC 
Acknowledgments:

Name: the Mozilla project
Upstream: Pham Bao (VinCSS - Member of Vingroup)
Comment 2 errata-xmlrpc 2020-12-16 07:52:30 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Extended Update Support

Via RHSA-2020:5564 https://access.redhat.com/errata/RHSA-2020:5564
Comment 3 errata-xmlrpc 2020-12-16 07:54:56 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:5562 https://access.redhat.com/errata/RHSA-2020:5562
Comment 4 errata-xmlrpc 2020-12-16 08:02:00 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2020:5563 https://access.redhat.com/errata/RHSA-2020:5563
Comment 5 errata-xmlrpc 2020-12-16 08:14:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

Via RHSA-2020:5565 https://access.redhat.com/errata/RHSA-2020:5565
Comment 6 errata-xmlrpc 2020-12-16 08:22:08 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:5561 https://access.redhat.com/errata/RHSA-2020:5561
Comment 7 Product Security DevOps Team 2020-12-16 10:18:44 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-2020-26974
Comment 8 errata-xmlrpc 2020-12-17 15:09:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:5618 https://access.redhat.com/errata/RHSA-2020:5618
Comment 9 errata-xmlrpc 2020-12-17 16:18:32 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2020:5622 https://access.redhat.com/errata/RHSA-2020:5622
Comment 10 errata-xmlrpc 2020-12-17 16:23:19 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:5624 https://access.redhat.com/errata/RHSA-2020:5624
Comment 11 errata-xmlrpc 2020-12-21 12:32:07 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 12 errata-xmlrpc 2020-12-21 13:35:52 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
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