CVE-2021-23993

CVE Details

Release Date:

2021-06-24

Description

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. This vulnerability affects Thunderbird < 78.9.1.

See more information about CVE-2021-23993 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score:	6.5	Base Metrics:	AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Access Vector:	Network	Attack Complexity:	Low
Privileges Required:	None	User Interaction:	Required
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	High	Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (thunderbird)	ELSA-2021-1192	2021-04-15
Oracle Linux version 8 (thunderbird)	ELSA-2021-1193	2021-04-15

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team