Oracle Linux 6 : tomcat6 (ELSA-2017-0527)

2017-03-16T00:00:00
ID ORACLELINUX_ELSA-2017-0527.NASL
Type nessus
Reporter This script is Copyright (C) 2017-2021 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2017-03-16T00:00:00

Description

From Red Hat Security Advisory 2017:0527 :

An update for tomcat6 is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies.

Security Fix(es) :

  • It was discovered that the code that parsed the HTTP request line permitted invalid characters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other then their own. (CVE-2016-6816)

Note: This fix causes Tomcat to respond with an HTTP 400 Bad Request error when request contains characters that are not permitted by the HTTP specification to appear not encoded, even though they were previously accepted. The newly introduced system property tomcat.util.http.parser.HttpParser.requestTargetAllow can be used to configure Tomcat to accept curly braces ({ and }) and the pipe symbol (|) in not encoded form, as these are often used in URLs without being properly encoded.

  • A bug was discovered in the error handling of the send file code for the NIO HTTP connector. This led to the current Processor object being added to the Processor cache multiple times allowing information leakage between requests including, and not limited to, session ID and the response body. (CVE-2016-8745)

                                        
                                            #%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2017:0527 and 
# Oracle Linux Security Advisory ELSA-2017-0527 respectively.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(97765);
  script_version("3.12");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");

  script_cve_id("CVE-2016-6816", "CVE-2016-8745");
  script_xref(name:"RHSA", value:"2017:0527");

  script_name(english:"Oracle Linux 6 : tomcat6 (ELSA-2017-0527)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Oracle Linux host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"From Red Hat Security Advisory 2017:0527 :

An update for tomcat6 is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security
impact of Moderate. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

Apache Tomcat is a servlet container for the Java Servlet and
JavaServer Pages (JSP) technologies.

Security Fix(es) :

* It was discovered that the code that parsed the HTTP request line
permitted invalid characters. This could be exploited, in conjunction
with a proxy that also permitted the invalid characters but with a
different interpretation, to inject data into the HTTP response. By
manipulating the HTTP response the attacker could poison a web-cache,
perform an XSS attack, or obtain sensitive information from requests
other then their own. (CVE-2016-6816)

Note: This fix causes Tomcat to respond with an HTTP 400 Bad Request
error when request contains characters that are not permitted by the
HTTP specification to appear not encoded, even though they were
previously accepted. The newly introduced system property
tomcat.util.http.parser.HttpParser.requestTargetAllow can be used to
configure Tomcat to accept curly braces ({ and }) and the pipe symbol
(|) in not encoded form, as these are often used in URLs without being
properly encoded.

* A bug was discovered in the error handling of the send file code for
the NIO HTTP connector. This led to the current Processor object being
added to the Processor cache multiple times allowing information
leakage between requests including, and not limited to, session ID and
the response body. (CVE-2016-8745)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://oss.oracle.com/pipermail/el-errata/2017-March/006786.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected tomcat6 packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:tomcat6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:tomcat6-admin-webapps");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:tomcat6-docs-webapp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:tomcat6-el-2.1-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:tomcat6-javadoc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:tomcat6-jsp-2.1-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:tomcat6-lib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:tomcat6-servlet-2.5-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:tomcat6-webapps");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:6");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/03/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/03/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/03/16");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Oracle Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list");

  exit(0);
}


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


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/OracleLinux")) audit(AUDIT_OS_NOT, "Oracle Linux");
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, "Oracle Linux");
os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Oracle Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 6", "Oracle Linux " + os_ver);

if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Oracle Linux", cpu);

flag = 0;
if (rpm_check(release:"EL6", reference:"tomcat6-6.0.24-105.el6_8")) flag++;
if (rpm_check(release:"EL6", reference:"tomcat6-admin-webapps-6.0.24-105.el6_8")) flag++;
if (rpm_check(release:"EL6", reference:"tomcat6-docs-webapp-6.0.24-105.el6_8")) flag++;
if (rpm_check(release:"EL6", reference:"tomcat6-el-2.1-api-6.0.24-105.el6_8")) flag++;
if (rpm_check(release:"EL6", reference:"tomcat6-javadoc-6.0.24-105.el6_8")) flag++;
if (rpm_check(release:"EL6", reference:"tomcat6-jsp-2.1-api-6.0.24-105.el6_8")) flag++;
if (rpm_check(release:"EL6", reference:"tomcat6-lib-6.0.24-105.el6_8")) flag++;
if (rpm_check(release:"EL6", reference:"tomcat6-servlet-2.5-api-6.0.24-105.el6_8")) flag++;
if (rpm_check(release:"EL6", reference:"tomcat6-webapps-6.0.24-105.el6_8")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "tomcat6 / tomcat6-admin-webapps / tomcat6-docs-webapp / etc");
}