Vulnerabilities > CVE-2011-1766 - Improper Authentication vulnerability in Mediawiki

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory 2011-6774.
#

include("compat.inc");

if (description)
{
  script_id(54608);
  script_version("1.11");
  script_cvs_date("Date: 2019/08/02 13:32:35");

  script_cve_id("CVE-2011-1765", "CVE-2011-1766");
  script_bugtraq_id(47722);
  script_xref(name:"FEDORA", value:"2011-6774");

  script_name(english:"Fedora 14 : mediawiki-1.16.5-59.fc14 (2011-6774)");
  script_summary(english:"Checks rpm output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"MediaWiki 1.16.5 was released to correct two security flaws :

The first issue is yet another recurrence of the Internet Explorer 6
XSS vulnerability that caused the release of 1.16.4. It was pointed
out that there are dangerous extensions with more than four
characters, so the regular expressions we introduced had to be updated
to match longer extensions. (CVE-2011-1765)

The second issue allows unauthenticated users to gain additional
rights, on wikis where $wgBlockDisablesLogin is enabled. By default,
it is disabled. The issue occurs when a malicious user sends cookies
which contain the user name and user ID of a 'victim' account. In
certain circumstances, the rights of the victim are loaded and persist
throughout the malicious request, allowing the malicious user to
perform actions with the victim's rights. (CVE-2011-1766)

$wgBlockDisablesLogin is a feature which is sometimes used on private
wikis to prevent users who have an account from logging in and viewing
content on the wiki.

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=702512"
  );
  # https://lists.fedoraproject.org/pipermail/package-announce/2011-May/060496.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?ad094270"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected mediawiki package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:mediawiki");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:14");

  script_set_attribute(attribute:"patch_publication_date", value:"2011/05/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/05/23");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Fedora Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "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);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! ereg(pattern:"^14([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 14.x", "Fedora " + 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, "Fedora", cpu);

flag = 0;
if (rpm_check(release:"FC14", reference:"mediawiki-1.16.5-59.fc14")) 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, "mediawiki");
}