Information disclosire in RESTEasy

1) Information disclosure

EUVDB-ID: #VU56965

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-20289

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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

The vulnerability exists due to excessive data output by the application when RESTEasy cannot convert one of the request URI path or query values to the matching JAX-RS resource method's parameter value. A remote attacker can obtain endpoint class and method names.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Resteasy: 4.0.0.Final - 4.5.12.Final

CPE2.3

• cpe:2.3:a:resteasy:resteasy:4.0.0.Final:*:*:*:*:*:*:*
• cpe:2.3:a:resteasy:resteasy:4.1.0.Final:*:*:*:*:*:*:*
• cpe:2.3:a:resteasy:resteasy:4.1.1.Final:*:*:*:*:*:*:*

External links

https://bugzilla.redhat.com/show_bug.cgi?id=1935927

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.