#VU25127 Cleartext storage of sensitive information in Mozilla Thunderbird - CVE-2020-6794

Vulnerability identifier: #VU25127

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-6794

CWE-ID: CWE-312

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Mozilla Thunderbird
Client/Desktop applications / Messaging software

Vendor: Mozilla

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to an error password management functionality when working with master password that was updated after Thunderbird 60 release. The old password is still available unencrypted on the system, as Thunderbird did not delete the old password file after update.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Thunderbird: 52.0 - 52.9.1, 60.0 - 68.4.2

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External links
https://www.mozilla.org/en-US/security/advisories/mfsa2020-07/

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.