SB2020051103 - Debian update for tomcat9

Description

This security bulletin contains information about 6 secuirty vulnerabilities.

1) Resource management error (CVE-ID: CVE-2019-10072)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to incomplete fix for SB2019020812 when processing HTTP/2 requests. A remote attacker can perform denial of service attack by not sending WINDOW_UPDATE messages for the connection window (stream 0).

2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-12418)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to the local user without access to the Tomcat process or configuration files is able to manipulate the RMI registry to perform a man-in-the-middle attack to capture user names and passwords used to access the JMX interface.

Successful vulnerability exploitation requires that Apache Tomcat is configured with the JMX Remote Lifecycle Listener.

3) Session Fixation (CVE-ID: CVE-2019-17563)

The vulnerability allows a remote attacker to perform a session fixation attack.

The vulnerability exists due to a race condition when FORM authentication is used in Apache Tomcat. A remote attacker can use a narrow window to perform a session fixation attack.

4) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2019-17569)

The vulnerability allows a remote attacker to perform HTTP request smuggling attack.

The vulnerability exists due to improper input validation when processing a Transfer-Encoding headers. A remote attacker can send a specially crafted HTTP request and perform HTTP request smuggling attack.

5) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2020-1935)

The vulnerability allows a remote attacker to perform HTTP request smuggling attack.

The vulnerability exists due to the HTTP header parsing code uses an approach to end-of-line parsing that allows some invalid HTTP headers to be parsed as valid. A remote attacker can send a specially crafted HTTP request and perform HTTP request smuggling attack.

6) Path traversal (CVE-ID: CVE-2020-1938)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation in Apache Tomcat AJP connector. A remote attacker can send a specially crafted AJP request, include and execute arbitrary files on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://www.debian.org/security/2020/dsa-4680