Bug 1948395 (CVE-2021-23993) - CVE-2021-23993 Mozilla: Inability to send encrypted OpenPGP email after importing a crafted OpenPGP key
Summary: CVE-2021-23993 Mozilla: Inability to send encrypted OpenPGP email after impor...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-23993
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: 2021-07-07 11:53 UTC (History)
5 users (show)

Fixed In Version: thunderbird 78.9.1
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Last Closed: 2021-04-14 16:46:56 UTC
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Description Doran Moppert 2021-04-12 06:46:50 UTC 
An attacker may perform a DoS attack to prevent a user from sending encrypted email to a correspondent. If an attacker creates a crafted OpenPGP key with a subkey that has an invalid self signature, and the Thunderbird user imports the crafted key, then Thunderbird may try to use the invalid subkey, but the RNP library rejects it from being used, causing encryption to fail.



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2021-13/#CVE-2021-23993
Comment 1 Doran Moppert 2021-04-12 06:46:55 UTC 
Acknowledgments:

Name: the Mozilla project
Upstream: Neal Walfield
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 14:40:39 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 16:46:56 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-2021-23993
Comment 6 errata-xmlrpc 2021-04-14 17:07:49 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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