Information disclosure in Apache Tomcat

1) Information disclosure

EUVDB-ID: #VU67714

Risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-43980

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 incorrect implementation of blocking reads and writes. A remote attacker can trigger a concurrency bug and force client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Apache Tomcat: 8.5.0 - 10.1.0-M12

External links

http://lists.apache.org/thread/3jjqbsp6j88b198x5rmg99b1qr8ht3g3

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.