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CVE-2021-23991

Published: Jun 24, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDUNVD-CWE-Other
6.8MEDIUM
NVD MITRE
EPSS Score
1.0%
Top 39.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

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. This vulnerability affects Thunderbird < 78.9.1.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:RS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

NVD-CWE-Other

Affected Products

Novell Inc.
commercial·US
SUSE Linux Enterprise Workstation ExtensionOn-prem
Operating Systems / linux-distro
OpenSUSE LeapOn-premOS
Operating Systems / linux-distro
SUSE Linux Enterprise Module for Open Buildservice Development ToolsOn-prem
Operating Systems / linux-distro
Red Hat Inc.
commercial·USaka red hat
Red Hat Enterprise LinuxOn-premOS
Operating Systems / linux-distro
Сообщество свободного программного обеспечения
oss-projectaka fsf
Debian GNU/LinuxOn-premOS
Operating Systems / linux-distro
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
Mozilla Corp.
oss-project·USaka Mozilla
ThunderbirdOn-premDesktop App
Communications / email-server-client
АО «Концерн ВНИИНС»
commercial·RUaka ao konsern vniins
ОС ОН «Стрелец»On-premOS
Operating Systems / linux-distro
and 3 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2021-23991?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://access.redhat.com/security/cve/CVE-2021-23991&#13;
access.redhat.com
https://redos.red-soft.ru/updatesec&#13;
redos.red-soft.ru
https://security-tracker.debian.org/tracker/CVE-2021-23991&#13;
security-tracker.debian.org
and 7 more references View all →

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