Information disclosure in Undertow

1) Resource management error

EUVDB-ID: #VU101669

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-2024-4109

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to incorrect handling of HTTP/2 requests when reusing connections, which results in parts of data from previous connection to be included into new responses. A remote attacker can send an HTTP/2 request to the server and gain access to potentially sensitive information.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Undertow: 2.0.0.Alpha1 - 2.3.18

CPE2.3

• cpe:2.3:a:red_hat:undertow:2.0.0.Alpha1:*:*:*:*:wildfly_core:*:*
• cpe:2.3:a:red_hat:undertow:2.0.0.Alpha2:*:*:*:*:wildfly_core:*:*
• cpe:2.3:a:red_hat:undertow:2.0.0:*:*:*:*:wildfly_core:*:*

External links

https://bugzilla.redhat.com/show_bug.cgi?id=2272325

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.