Path traversal in keycloak

1) Path traversal

EUVDB-ID: #VU70169

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-3782

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform path traversal attacks.

The vulnerability exists due to insufficient validation of URLs included in a redirect. A remote attacker can construct a malicious request to bypass validation by using double encoding, access other URLs and potentially sensitive information within the domain.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Keycloak: 1.0 - 20.0.0

External links

http://github.com/keycloak/keycloak/security/advisories/GHSA-g8q8-fggx-9r3q

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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