Information disclosure in Apache Tomcat

Published: 2022-09-28

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2021-43980
CWE-ID	CWE-200
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Apache Tomcat Server applications / Web servers
Vendor	Apache Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU67714

Risk: Low

CVSSv3.1:

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: 10.1.0-M1 - 10.1.0-M12, 10.0.0 - 10.0.18, 9.0.0 - 9.0.60, 8.5.0 - 8.5.77

CPE2.3

cpe:2.3:a:apache_foundation:apache_tomcat:10.1.0-M12:*:*:*:*:*:*:*

External links

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

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?