Multiple vulnerabilities in Firefly III

Published: 2021-10-11

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	N/A
CWE-ID	CWE-601 CWE-434
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	Firefly III Client/Desktop applications / Other client software
Vendor	James Cole

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Open redirect

EUVDB-ID: #VU57177

Risk: Low

CVSSv3.1: 3.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Exploit availability: No

Description

The vulnerability allows a remote attacker to redirect victims to arbitrary URL.

The vulnerability exists due to improper sanitization of user-supplied data. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the authenticated victim to arbitrary domain.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Firefly III: 5.0.0 - 5.6.1

External links

http://github.com/firefly-iii/firefly-iii/releases/tag/5.6.2
http://huntr.dev/bounties/549a1040-9b5e-420b-9b80-20700dd9d592/

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. However, proof of concept for this vulnerability is available.

2) Arbitrary file upload

EUVDB-ID: #VU57178

Risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]