SB2018082907 - Debian update for tomcat8
Published: August 29, 2018
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Security restrictions bypass (CVE-ID: CVE-2018-1304)
The vulnerability allows a remote attacker to bypass security restrictions on the target system.The weakness exists due to the URL pattern of "" (the empty string) which exactly maps to the context root was not correctly handled when used as part of a security constraint definition. A remote attacker can supply a specially crafted URL, bypass security restrictions and gain unauthorised access to web application resources.
2) Security restrictions bypass (CVE-ID: CVE-2018-1305)
The vulnerability allows a remote attacker to bypass security restrictions on the target system.The weakness exists due to security constraints defined by annotations of Servlets are only applied once a Servlet had been loaded. A remote attacker can supply a specially crafted URL pattern and any URLs below that point, bypass security restrictions and gain unauthorised access to arbitrary resources.
3) Infinite loop (CVE-ID: CVE-2018-1336)
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to improper handing of overflow in the UTF-8 decoder with supplementary characters. A remote attacker can send trigger an infinite loop in the decoder and cause the service to crash.
4) Security restrictions bypass (CVE-ID: CVE-2018-8034)
The vulnerability allows a remote attacker to bypass security restrictions on the target system.
The vulnerability exists due to host name verification when using TLS with the WebSocket client was missing. A remote unauthenticated attacker can bypass security restrictions when using TLS.
5) Information disclosure (CVE-ID: CVE-2018-8037)
The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.
The vulnerability exists due to improper handling of connection closures by the non-blocking I/O (NIO) and NIO2 connectors. A remote unauthenticated attacker can send a specially crafted request that submits malicious input, trigger bug in the tracking of connection closures, reuse user sessions in a new connection and access arbitrary data.
Remediation
Install update from vendor's website.