GLSA-200710-11 : X Font Server: Multiple Vulnerabilities

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 200710-11.
#
# The advisory text is Copyright (C) 2001-2016 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

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

if (description)
{
  script_id(27046);
  script_version("1.17");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id("CVE-2007-3103", "CVE-2007-4568", "CVE-2007-4990");
  script_xref(name:"GLSA", value:"200710-11");

  script_name(english:"GLSA-200710-11 : X Font Server: Multiple Vulnerabilities");
  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-200710-11
(X Font Server: Multiple Vulnerabilities)

    iDefense reported that the xfs init script does not correctly handle a
    race condition when setting permissions of a temporary file
    (CVE-2007-3103). Sean Larsson discovered an integer overflow
    vulnerability in the build_range() function possibly leading to a
    heap-based buffer overflow when handling 'QueryXBitmaps' and
    'QueryXExtents' protocol requests (CVE-2007-4568). Sean Larsson also
    discovered an error in the swap_char2b() function possibly leading to a
    heap corruption when handling the same protocol requests
    (CVE-2007-4990).
  
Impact :

    The first issue would allow a local attacker to change permissions of
    arbitrary files to be world-writable by performing a symlink attack.
    The second and third issues would allow a local attacker to execute
    arbitrary code with privileges of the user running the X Font Server,
    usually xfs.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200710-11"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All X Font Server users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=x11-apps/xfs-1.0.5'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:'CANVAS');
  script_cwe_id(59, 119, 189);

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

  script_set_attribute(attribute:"patch_publication_date", value:"2007/10/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2007/10/15");
  script_set_attribute(attribute:"vuln_publication_date", value:"2007/10/02");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2007-2021 Tenable Network Security, Inc.");
  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:"x11-apps/xfs", unaffected:make_list("ge 1.0.5"), vulnerable:make_list("lt 1.0.5"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "X Font Server");
}