Bug 1948393 (CVE-2021-23991) - CVE-2021-23991 Mozilla: An attacker may use Thunderbird's OpenPGP key refresh mechanism to poison an existing key
Summary: CVE-2021-23991 Mozilla: An attacker may use Thunderbird's OpenPGP key refresh...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-23991
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1948387 1948388 1948389 1948390 1948391 1948392
Blocks: 1948385
TreeView+ depends on / blocked
 
Reported: 2021-04-12 06:46 UTC by Doran Moppert
Modified: 2021-07-09 12:14 UTC (History)
5 users (show)

Fixed In Version: thunderbird 78.9.1
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Environment:
Last Closed: 2021-04-14 16:46:51 UTC
Embargoed:

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Description Doran Moppert 2021-04-12 06:46:29 UTC 
If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has not yet been imported, an attacker may send an email containing a crafted version of Alice's key with an invalid subkey, Thunderbird might subsequently attempt to use the invalid subkey, and will fail to send encrypted email to Alice.



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2021-13/#CVE-2021-23991
Comment 1 Doran Moppert 2021-04-12 06:46:33 UTC 
Acknowledgments:

Name: the Mozilla project
Upstream: Cure53
Comment 2 errata-xmlrpc 2021-04-14 11:11:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Extended Update Support

Via RHSA-2021:1190 https://access.redhat.com/errata/RHSA-2021:1190
Comment 3 errata-xmlrpc 2021-04-14 14:20:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:1193 https://access.redhat.com/errata/RHSA-2021:1193
Comment 4 errata-xmlrpc 2021-04-14 14:40:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:1192 https://access.redhat.com/errata/RHSA-2021:1192
Comment 5 Product Security DevOps Team 2021-04-14 16:46:51 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-2021-23991
Comment 6 errata-xmlrpc 2021-04-14 17:07:45 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2021:1201 https://access.redhat.com/errata/RHSA-2021:1201
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