Information disclosure in Apache Tomcat



Published: 2020-10-12
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-13943
CWE-ID CWE-399
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Apache Tomcat
Server applications / Web servers

Vendor Apache Foundation

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Resource management error

EUVDB-ID: #VU47516

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2020-13943

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 improper management of internal resources within the application when processing HTTP/2 requests. If an HTTP/2 client exceeded the agreed maximum number of concurrent streams for a connection (in violation of the HTTP/2 protocol), it was possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This could lead to users seeing responses for unexpected resources.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Apache Tomcat: 10.0.0-M1 - 10.0.0.0-M1, 9.0.0 - 9.0.37, 8.5.0 - 8.5.57


CPE2.3 External links

http://seclists.org/oss-sec/2020/q4/42

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?



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