GLSA-202012-23 : Apache Tomcat: Information disclosure

high Nessus Plugin ID 144614
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote Gentoo host is missing one or more security-related patches.

Description

The remote host is affected by the vulnerability described in GLSA-202012-23 (Apache Tomcat: Information disclosure)

It was discovered that Apache Tomcat could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream.
Impact :

A remote attacker, by sending well-timed HTTP/2 requests, could possibly obtain sensitive information.
Workaround :

Disable HTTP/2 support.

Solution

All Apache Tomcat 8.5.x users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=www-servers/tomcat-8.5.60:8.5' All Apache Tomcat 9.x users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=www-servers/tomcat-9.0.40:9'

See Also

https://security.gentoo.org/glsa/202012-23

Plugin Details

Severity: High

ID: 144614

File Name: gentoo_GLSA-202012-23.nasl

Version: 1.4

Type: local

Published: 12/28/2020

Updated: 3/12/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2020-17527

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:tomcat, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Ease: No known exploits are available

Patch Publication Date: 12/24/2020

Vulnerability Publication Date: 12/3/2020

Reference Information

CVE: CVE-2020-17527

GLSA: 202012-23

IAVA: 2020-A-0570-S