Mozilla Thunderbird up to 78.6 STARTTLS missing encryption

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Mozilla Thunderbird up to 78.6. This impacts an unknown function of the component STARTTLS Handler. The manipulation results in missing encryption. This vulnerability was named CVE-2020-15685. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Mozilla Thunderbird up to 78.6 (Mail Client Software). Affected is an unknown functionality of the component STARTTLS Handler. The manipulation with an unknown input leads to a missing encryption vulnerability. CWE is classifying the issue as CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. This is going to have an impact on confidentiality. CVE summarizes:

During the plaintext phase of the STARTTLS connection setup, protocol commands could have been injected and evaluated within the encrypted session. This vulnerability affects Thunderbird < 78.7.

The weakness was presented 12/23/2022. The advisory is shared for download at mozilla.org. This vulnerability is traded as CVE-2020-15685 since 07/10/2020. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1600.

The vulnerability scanner Nessus provides a plugin with the ID 208628 (CentOS 7 : thunderbird (RHSA-2021:0297)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 78.7 eliminates this vulnerability. The upgrade is hosted for download at mozilla.org.

The vulnerability is also documented in the vulnerability database at Tenable (208628). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.2

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Missing encryption
CWE: CWE-311 / CWE-310
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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Nessus ID: 208628
Nessus Name: CentOS 7 : thunderbird (RHSA-2021:0297)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Thunderbird 78.7

Timelineinfo

07/10/2020 🔍
12/23/2022 +896 days 🔍
12/23/2022 +0 days 🔍
04/16/2025 +845 days 🔍

Sourcesinfo

Vendor: mozilla.org

Advisory: mozilla.org
Status: Confirmed

CVE: CVE-2020-15685 (🔍)
GCVE (CVE): GCVE-0-2020-15685
GCVE (VulDB): GCVE-100-216588

Entryinfo

Created: 12/23/2022 08:14
Updated: 04/16/2025 18:23
Changes: 12/23/2022 08:14 (42), 01/22/2023 17:17 (11), 10/12/2024 19:37 (17), 04/16/2025 18:23 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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