#VU57241 Cleartext transmission of sensitive information in Mozilla Thunderbird - CVE-2021-38502


Vulnerability identifier: #VU57241

Vulnerability risk: Medium

CVSSv4.0: 5 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-38502

CWE-ID: CWE-319

Exploitation vector: Local network

Exploit availability: No

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

Vendor: Mozilla

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to software ignores the configuration to require STARTTLS security for an SMTP connection. A remote attacker with ability to intercept network traffic can gain access to sensitive data.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Thunderbird: 91.0 - 91.1.2


External links
http://www.mozilla.org/en-US/security/advisories/mfsa2021-47/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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


Latest bulletins with this vulnerability