Vulnerability identifier: #VU63299

Vulnerability risk: Medium

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-25762

CWE-ID: CWE-388

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache Tomcat
Server applications / Web servers

Vendor: Apache Foundation

Description

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

The vulnerability exists due to an error when handling WebSocket connections. If a web application sends a WebSocket message concurrently with the WebSocket connection closing, it is possible that the application will continue to use the socket after it has been closed. As a result, subsequent connections can use the same object concurrently and share data and/or other errors.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache Tomcat: 9.0.0 - 9.0.20, 8.5.0 - 8.5.75

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External links
http://lists.apache.org/thread/6ckmjfb1k61dyzkto9vm2k5jvt4o7w7c
http://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.21
http://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.76

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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.