CVE-2020-6794

Mozilla: Setting a master password post-Thunderbird 52 does not delete unencrypted previously stored passwords

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

If a user saved passwords before Thunderbird 60 and then later set a master password, an unencrypted copy of these passwords is still accessible. This is because the older stored password file was not deleted when the data was copied to a new format starting in Thunderbird 60. The new master password is added only on the new file. This could allow the exposure of stored password data outside of user expectations. This vulnerability affects Thunderbird < 68.5.

Si un usuario ha guardado las contraseñas antes de Thunderbird versión 60 y luego más tarde estableció una contraseña maestra, una copia no cifrada de estas contraseñas aún son accesibles. Esto es debido a que el archivo de contraseñas almacenadas más antiguo no fue eliminado cuando los datos fueron copiados a un nuevo formato a partir de Thunderbird versión 60. La nueva contraseña maestra es agregada sólo en el nuevo archivo. Esto podría permitir la exposición de los datos de las contraseñas almacenadas fuera de las expectativas del usuario. Esta vulnerabilidad afecta a Thunderbird versiones anteriores a 68.5.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-01-10 CVE Reserved
2020-02-14 CVE Published
2023-07-05 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-312: Cleartext Storage of Sensitive Information
CWE-459: Incomplete Cleanup
CWE-522: Insufficiently Protected Credentials

CAPEC

References (7)

URL	Tag	Source

URL	Date	SRC
https://bugzilla.mozilla.org/show_bug.cgi?id=1606619	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://security.gentoo.org/glsa/202003-10	2022-01-01
https://usn.ubuntu.com/4328-1	2022-01-01
https://usn.ubuntu.com/4335-1	2022-01-01
https://www.mozilla.org/security/advisories/mfsa2020-07	2022-01-01
https://access.redhat.com/security/cve/CVE-2020-6794	2020-02-24
https://bugzilla.redhat.com/show_bug.cgi?id=1801956	2020-02-24

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mozilla Search vendor "Mozilla"		Thunderbird Search vendor "Mozilla" for product "Thunderbird"				< 68.5.0 Search vendor "Mozilla" for product "Thunderbird" and version " < 68.5.0"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"		esm		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				19.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "19.10"		-		Affected