#VU86549 Improper Output Neutralization for Logs in Keycloak - CVE-2023-6484

Vulnerability identifier: #VU86549

Vulnerability risk: Medium

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

CVE-ID: CVE-2023-6484

CWE-ID: CWE-117

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Keycloak
Server applications / Directory software, identity management

Vendor: Keycloak

Description

The vulnerability allows a remote attacker to manipulate data in log files.

The vulnerability exists due to improper input validation during WebAuthn authentication or registration. A remote attacker can manipulate data in log files when using the WebAuthn authentication mode.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Keycloak: 22.0.0 - 23.0.4

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=2248423
https://github.com/keycloak/keycloak/security/advisories/GHSA-j628-q885-8gr5
https://access.redhat.com/errata/RHSA-2024:1867
https://access.redhat.com/errata/RHSA-2024:1868

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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.