Scientific Linux Security Update : httpd on SL7.x x86_64 (20160718) (httpoxy)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#

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

if (description)
{
  script_id(92404);
  script_version("2.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");

  script_cve_id("CVE-2016-5387");

  script_name(english:"Scientific Linux Security Update : httpd on SL7.x x86_64 (20160718) (httpoxy)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Scientific Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Security Fix(es) :

  - It was discovered that httpd used the value of the Proxy
    header from HTTP requests to initialize the HTTP_PROXY
    environment variable for CGI scripts, which in turn was
    incorrectly used by certain HTTP client implementations
    to configure the proxy for outgoing HTTP requests. A
    remote attacker could possibly use this flaw to redirect
    HTTP requests performed by a CGI script to an
    attacker-controlled proxy via a malicious HTTP request.
    (CVE-2016-5387)

Note: After this update, httpd will no longer pass the value of the
Proxy request header to scripts via the HTTP_PROXY environment
variable.

Bug Fix(es) :

  - In a caching proxy configuration, the mod_cache module
    would treat content as stale if the Expires header
    changed when refreshing a cached response. As a
    consequence, an origin server returning content without
    a fixed Expires header would not be treated as
    cacheable. The mod_cache module has been fixed to ignore
    changes in the Expires header when refreshing content.
    As a result, such content is now cacheable, improving
    performance and reducing load at the origin server.

  - The HTTP status code 451 'Unavailable For Legal Reasons'
    was not usable in the httpd configuration. As a
    consequence, modules such as mod_rewrite could not be
    configured to return a 451 error if required for legal
    purposes. The 451 status code has been added to the list
    of available error codes, and modules can now be
    configured to return a 451 error if required."
  );
  # https://listserv.fnal.gov/scripts/wa.exe?A2=ind1607&L=scientific-linux-errata&F=&S=&P=5751
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?c8a070b1"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:httpd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:httpd-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:httpd-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:httpd-manual");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:httpd-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:mod_ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:mod_proxy_html");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:mod_session");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:mod_ssl");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/07/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/07/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/07/19");
  script_set_attribute(attribute:"in_the_news", value:"true");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Scientific Linux Local Security Checks");

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

  exit(0);
}


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

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
os_ver = pregmatch(pattern: "Scientific Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Scientific Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Scientific Linux 7.x", "Scientific 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 (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Scientific Linux", cpu);


flag = 0;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"httpd-2.4.6-40.el7_2.4")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"httpd-debuginfo-2.4.6-40.el7_2.4")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"httpd-devel-2.4.6-40.el7_2.4")) flag++;
if (rpm_check(release:"SL7", reference:"httpd-manual-2.4.6-40.el7_2.4")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"httpd-tools-2.4.6-40.el7_2.4")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"mod_ldap-2.4.6-40.el7_2.4")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"mod_proxy_html-2.4.6-40.el7_2.4")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"mod_session-2.4.6-40.el7_2.4")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"mod_ssl-2.4.6-40.el7_2.4")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "httpd / httpd-debuginfo / httpd-devel / httpd-manual / httpd-tools / etc");
}