5
MEDIUM

CVE-2018-8034

Published: 01/08/2018 Updated: 17/10/2018
CVSS v2 Base Score: 5 | Impact Score: 2.9 | Exploitability Score: 10
CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9

Vulnerability Summary

The host name verification when using TLS with the WebSocket client was missing. It is now enabled by default. Versions Affected: Apache Tomcat 9.0.0.M1 to 9.0.9, 8.5.0 to 8.5.31, 8.0.0.RC1 to 8.0.52, and 7.0.35 to 7.0.88.

A vulnerability in the WebSocket client of Apache Tomcat could allow an unauthenticated, remote attacker to bypass security restrictions on a targeted system.

The vulnerability exists because the affected software improperly verifies hostnames when using Transport Layer Security (TLS) connections. An attacker could exploit this vulnerability by performing a man-in-the-middle attack on the Apache WebSocket client. A successful exploit could allow the attacker to bypass security restrictions on the system.
The Apache Software Foundation has confirmed the vulnerability and released software updates.

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Access Complexity: LOW
Authentication: NONE
Access Vector: NETWORK
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Vulnerability Trend

Affected Products

Vendor Product Versions
ApacheTomcat7.0.35, 7.0.36, 7.0.37, 7.0.38, 7.0.39, 7.0.40, 7.0.41, 7.0.42, 7.0.43, 7.0.44, 7.0.45, 7.0.46, 7.0.47, 7.0.48, 7.0.49, 7.0.50, 7.0.51, 7.0.54, 7.0.55, 7.0.56, 7.0.57, 7.0.58, 7.0.59, 7.0.60, 7.0.61, 7.0.62, 7.0.63, 7.0.64, 7.0.65, 7.0.66, 7.0.67, 7.0.68, 7.0.69, 7.0.70, 7.0.71, 7.0.72, 7.0.73, 7.0.74, 7.0.75, 7.0.76, 7.0.77, 7.0.78, 7.0.79, 7.0.80, 7.0.81, 7.0.82, 7.0.83, 7.0.84, 7.0.85, 8.0.0, 8.0.1, 8.0.2, 8.0.4, 8.0.6, 8.0.7, 8.0.9, 8.0.10, 8.0.11, 8.0.12, 8.0.13, 8.0.14, 8.0.15, 8.0.16, 8.0.17, 8.0.18, 8.0.19, 8.0.20, 8.0.21, 8.0.22, 8.0.23, 8.0.24, 8.0.25, 8.0.26, 8.0.27, 8.0.28, 8.0.29, 8.0.30, 8.0.31, 8.0.32, 8.0.33, 8.0.34, 8.0.35, 8.0.36, 8.0.37, 8.0.38, 8.0.39, 8.0.40, 8.0.41, 8.0.42, 8.0.43, 8.0.44, 8.0.47, 8.0.48, 8.0.49, 8.5.0, 8.5.1, 8.5.2, 8.5.3, 8.5.4, 8.5.5, 8.5.6, 8.5.7, 8.5.8, 8.5.9, 8.5.10, 8.5.11, 8.5.12, 8.5.13, 8.5.14, 8.5.15, 8.5.23, 8.5.24, 8.5.27, 8.5.28, 8.5.29, 9.0.0, 9.0.1, 9.0.2, 9.0.3, 9.0.4, 9.0.5, 9.0.6, 9.0.7
CanonicalUbuntu Linux14.04, 16.04
DebianDebian Linux8.0, 9.0

Mitigation

Administrators are advised to apply the appropriate updates.

Administrators are advised to allow only trusted users to have network access.

Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.

Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.

Administrators can help protect affected systems from external attacks by using a solid firewall strategy.

Administrators are advised to monitor affected systems.

Exploitation

To exploit this vulnerability, an attacker must perform a man-in-the-middle attack, making exploitation more difficult in environments that restrict network access from untrusted sources.

Mailing Lists

References