Vulnerability Name:

CVE-2021-23991 (CCN-199671)

Assigned:2021-04-08
Published:2021-04-08
Updated:2021-07-08
Summary: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.
CVSS v3 Severity:6.8 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N)
5.9 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
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
6.8 Medium (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N)
5.9 Medium (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:4.0 Medium (CVSS v2 Vector: AV:N/AC:H/Au:N/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
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 Type:CWE-Other
CWE-347
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2021-23991

Source: MISC
Type: Exploit, Issue Tracking, Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1673240

Source: XF
Type: UNKNOWN
thunderbird-cve202123991-sec-bypass(199671)

Source: CCN
Type: Mozilla Foundation Security Advisory 2021-13
Security Vulnerabilities fixed in Thunderbird 78.9.1

Source: MISC
Type: Release Notes, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-13/

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2021-23991

Vulnerable Configuration:Configuration 1:
  • cpe:/a:mozilla:thunderbird:*:*:*:*:*:*:*:* (Version < 78.9.1)

    • Configuration RedHat 1:
  • cpe:/o:redhat:enterprise_linux:7:*:*:*:*:*:*:*

    • Configuration RedHat 2:
  • cpe:/o:redhat:enterprise_linux:7::client:*:*:*:*:*

    • Configuration RedHat 3:
  • cpe:/o:redhat:enterprise_linux:7::server:*:*:*:*:*

    • Configuration RedHat 4:
  • cpe:/o:redhat:enterprise_linux:7::workstation:*:*:*:*:*

    • Configuration RedHat 5:
  • cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*

    • Configuration RedHat 6:
  • cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:mozilla:thunderbird:78.9.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:645
    P
    		Security update for php7 (Moderate) (in QA)
    2022-10-04
    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:111905
    P
    		MozillaThunderbird-91.1.1-1.1 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:105478
    P
    		MozillaThunderbird-91.1.1-1.1 on GA media (Moderate)
    2021-10-01
    oval:org.opensuse.security:def:111330
    P
    		Security update for MozillaThunderbird (Important)
    2021-04-19
    oval:com.redhat.rhsa:def:20211192
    P
    		RHSA-2021:1192: thunderbird security update (Moderate)
    2021-04-14
    oval:com.redhat.rhsa:def:20211193
    P
    		RHSA-2021:1193: thunderbird security update (Moderate)
    2021-04-14
    oval:org.opensuse.security:def:119774
    P
    		Security update for MozillaThunderbird (Important)
    2021-04-13
    oval:org.opensuse.security:def:10634
    P
    		Security update for MozillaThunderbird (Important)
    2021-04-13
    oval:org.opensuse.security:def:70774
    P
    		Security update for MozillaThunderbird (Important)
    2021-04-13
    oval:org.opensuse.security:def:96296
    P
    		Security update for MozillaThunderbird (Important)
    2021-04-13
    oval:org.opensuse.security:def:96841
    P
    		Security update for MozillaThunderbird (Important)
    2021-04-13
    oval:org.opensuse.security:def:109634
    P
    		Security update for MozillaThunderbird (Important)
    2021-04-13
    oval:org.opensuse.security:def:102968
    P
    		Security update for MozillaThunderbird (Important)
    2021-04-13
    BACK
    mozilla thunderbird *
    mozilla thunderbird 78.9.0