Information disclosure in thunderbird (Alpine package)

1) Information disclosure

EUVDB-ID: #VU49022

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-35111

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

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

The vulnerability exists due to the proxy.onRequest API does not use proxy when viewing source code of the web application. A remote attacker, who controls the web server can obtain user's real IP address, if the user decides to view the web application source code while behind a proxy server.

Mitigation

Install update from vendor's website.

Vulnerable software versions

thunderbird (Alpine package): 78.5.1-r0

CPE2.3

• cpe:2.3:a:alpine:thunderbird_alpine_package:78.5.1-r0:*:*:*:*:alpine_linux:*:3.13

External links

https://git.alpinelinux.org/aports/commit/?id=beb8bd9db61e7a8b95bcb3d137eab4f24ac7f937

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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