Bug 1948395 (CVE-2021-23993)

Summary: CVE-2021-23993 Mozilla: Inability to send encrypted OpenPGP email after importing a crafted OpenPGP key
Product: [Other] Security Response Reporter: Doran Moppert <dmoppert>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: erack, jhorak, nobody, stransky, tpopela
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: thunderbird 78.9.1 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-04-14 16:46:56 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: 1948387, 1948388, 1948389, 1948390, 1948391, 1948392    
Bug Blocks: 1948385    

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