Upstream information

CVE-2021-23993 at MITRE

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.

SUSE information

Overall state of this security issue: Running

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 4.3
Vector AV:N/AC:M/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 6.5 4.3
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Access Vector Network Network
Access Complexity Low Low
Privileges Required None None
User Interaction Required Required
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact High None
Availability Impact None Low
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1184536 [RESOLVED / FIXED]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
openSUSE Leap 15.2
  • MozillaThunderbird >= 78.9.1-lp152.2.38.1
  • MozillaThunderbird-translations-common >= 78.9.1-lp152.2.38.1
  • MozillaThunderbird-translations-other >= 78.9.1-lp152.2.38.1
Patchnames:
openSUSE-2021-580
openSUSE Tumbleweed
  • MozillaThunderbird >= 91.1.1-1.1
  • MozillaThunderbird-translations-common >= 91.1.1-1.1
  • MozillaThunderbird-translations-other >= 91.1.1-1.1
Patchnames:
openSUSE Tumbleweed GA MozillaThunderbird-91.1.1-1.1


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
SUSE Linux Enterprise Workstation Extension 15 SP2 MozillaThunderbird Released
SUSE Linux Enterprise Workstation Extension 15 SP3 MozillaThunderbird Released