Mozilla Thunderbird up to 91.9 Braille Space certificate validation

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Mozilla Thunderbird up to 91.9. This impacts an unknown function of the component Braille Space Handler. Such manipulation leads to certificate validation. This vulnerability is documented as CVE-2022-1834. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Thunderbird up to 91.9 (Mail Client Software) and classified as problematic. Affected by this issue is an unknown functionality of the component Braille Space Handler. The manipulation with an unknown input leads to a certificate validation vulnerability. Using CWE to declare the problem leads to CWE-295. The product does not validate, or incorrectly validates, a certificate. Impacted is integrity. CVE summarizes:

When displaying the sender of an email, and the sender name contained the Braille Pattern Blank space character multiple times, Thunderbird would have displayed all the spaces. This could have been used by an attacker to send an email message with the attacker's digital signature, that was shown with an arbitrary sender email address chosen by the attacker. If the sender name started with a false email address, followed by many Braille space characters, the attacker's email address was not visible. Because Thunderbird compared the invisible sender address with the signature's email address, if the signing key or certificate was accepted by Thunderbird, the email was shown as having a valid digital signature. This vulnerability affects Thunderbird < 91.10.

The weakness was released 05/31/2022 by Jonathan von Niessen as Bug 1767816 as confirmed advisory (Website). The advisory is available at bugzilla.mozilla.org. The advisory contains:

When displaying the sender of an email, and the sender name contained the Braille Pattern Blank space character multiple times, Thunderbird would have displayed all the spaces. This could have been used by an attacker to send an email message with the attacker's digital signature, that was shown with an arbitrary sender email address chosen by the attacker. If the sender name started with a false email address, followed by many Braille space characters, the attacker's email address was not visible. Because Thunderbird compared the invisible sender address with the signature's email address, if the signing key or certificate was accepted by Thunderbird, the email was shown as having a valid digital signature.
This vulnerability is handled as CVE-2022-1834. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1587.003 by the MITRE ATT&CK project.

Upgrading to version 91.10 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

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Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Thunderbird 91.10

Timelineinfo

05/23/2022 🔍
05/31/2022 +8 days 🔍
05/31/2022 +0 days 🔍
09/30/2022 +122 days 🔍
04/17/2025 +930 days 🔍

Sourcesinfo

Vendor: mozilla.org

Advisory: Bug 1767816
Researcher: Jonathan von Niessen
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2022-1834 (🔍)
GCVE (CVE): GCVE-0-2022-1834
GCVE (VulDB): GCVE-100-209966

Entryinfo

Created: 09/30/2022 10:25
Updated: 04/17/2025 02:34
Changes: 09/30/2022 10:25 (18), 09/30/2022 10:28 (28), 10/26/2022 15:02 (1), 04/17/2025 02:34 (27)
Complete: 🔍
Cache ID: 216::103

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