GLSA-202012-23 : Apache Tomcat: Information disclosure

2020-12-28T00:00:00
ID GENTOO_GLSA-202012-23.NASL
Type nessus
Reporter This script is Copyright (C) 2020-2021 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-12-28T00:00:00

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.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 202012-23.
#
# The advisory text is Copyright (C) 2001-2020 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(144614);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/03/12");

  script_cve_id("CVE-2020-17527");
  script_xref(name:"GLSA", value:"202012-23");
  script_xref(name:"IAVA", value:"2020-A-0570-S");

  script_name(english:"GLSA-202012-23 : Apache Tomcat: Information disclosure");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis",
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description",
    value:
"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."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/202012-23"
  );
  script_set_attribute(
    attribute:"solution",
    value:
"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'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-17527");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:tomcat");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/12/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/12/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/12/28");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2020-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("qpkg.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"www-servers/tomcat", unaffected:make_list("ge 8.5.60", "ge 9.0.40"), vulnerable:make_list("lt 8.5.60", "lt 9.0.40"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:qpkg_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Apache Tomcat");
}