Vulnerability identifier: #VU81800

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-42795

CWE-ID: CWE-399

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 improper management of internal resources within the application when recycling various internal objects. A remote attacker can force Tomcat to skip some parts of the recycling process leading to information leaking from the current request/response to the next.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache Tomcat: 11.0.0-M1 - 11.0.0-M11, 10.1.0 - 10.1.13, 9.0.0 - 9.0.80, 8.5.0 - 8.5.93, 10.0.0 - 10.0.27

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External links
http://lists.apache.org/thread/065jfyo583490r9j2v73nhpyxdob56lw
http://github.com/apache/tomcat/commit/d6db22e411307c97ddf78315c15d5889356eca38
http://github.com/apache/tomcat/commit/9375d67106f8df9eb9d7b360b2bef052fe67d3d4
http://github.com/apache/tomcat/commit/44d05d75d696ca10ce251e4e370511e38f20ae75
http://github.com/apache/tomcat/commit/30f8063d7a9b4c43ae4722f5e382a76af1d7a6bf

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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.