Debian update for tomcat9

Published: 2021-01-24

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-13943 CVE-2020-17527
CWE-ID	CWE-399
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	tomcat9 (Debian package) Operating systems & Components / Operating system package or component
Vendor	Debian

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Resource management error

EUVDB-ID: #VU47516

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

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

Update tomcat9 package to version 9.0.31-1~deb10u3.

Vulnerable software versions

tomcat9 (Debian package): 9.0.13-1 - 9.0.41-1

CPE2.3

External links

https://www.debian.org/security/2021/dsa-4835

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.

2) Resource management error

EUVDB-ID: #VU48779