Vulnerability Name:

CVE-2021-4126 (CCN-215720)

Assigned:2021-12-21
Published:2021-12-21
Updated:2021-12-21
Summary:Mozilla Thunderbird could allow a remote attacker to bypass security restrictions, caused by the failure of OpenPGP signature status to consider additional message content. By persuading a victim to visit a specially-crafted Web site, a remote attacker could exploit this vulnerability to give the false impression that the additional contents were also covered by the digital signature.
CVSS v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2021-4126

Source: XF
Type: UNKNOWN
thunderbird-cve20214126-sec-bypass(215720)

Source: CCN
Type: Mozilla Foundation Security Advisory 2021-55
Security Vulnerabilities fixed in Thunderbird 91.4.1

Oval Definitions
Definition IDClassTitleLast Modified
oval:org.opensuse.security:def:3546
P
libICE6-1.0.8-12.1 on GA media (Moderate)
2022-06-28
oval:org.opensuse.security:def:95176
P
MozillaThunderbird-91.8.0-150200.8.65.1 on GA media (Moderate)
2022-06-22
oval:org.opensuse.security:def:111909
P
MozillaThunderbird-91.4.1-1.1 on GA media (Moderate)
2022-01-17
oval:org.opensuse.security:def:102359
P
Security update for MozillaThunderbird (Important)
2022-01-12
oval:org.opensuse.security:def:111874
P
Security update for MozillaThunderbird (Important)
2022-01-12
oval:org.opensuse.security:def:76457
P
Security update for MozillaThunderbird (Important)
2022-01-12
oval:org.opensuse.security:def:1815
P
Security update for MozillaThunderbird (Important)
2022-01-12
oval:org.opensuse.security:def:67389
P
Security update for MozillaThunderbird (Important)
2022-01-12
oval:org.opensuse.security:def:6300
P
Security update for MozillaThunderbird (Important)
2022-01-12
oval:org.opensuse.security:def:70851
P
Security update for MozillaThunderbird (Important)
2022-01-12
oval:org.opensuse.security:def:10711
P
Security update for MozillaThunderbird (Important)
2022-01-12
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