GLSA-200512-18 : XnView: Privilege escalation

#%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 200512-18.
#
# The advisory text is Copyright (C) 2001-2015 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(20371);
  script_version("1.15");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id("CVE-2005-4595");
  script_xref(name:"GLSA", value:"200512-18");

  script_name(english:"GLSA-200512-18 : XnView: Privilege escalation");
  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-200512-18
(XnView: Privilege escalation)

    Krzysiek Pawlik of Gentoo Linux discovered that the XnView package for
    IA32 used the DT_RPATH field insecurely, causing the dynamic loader to
    search for shared libraries in potentially untrusted directories.
  
Impact :

    A local attacker could create a malicious shared object that would be
    loaded and executed when a user attempted to use an XnView utility.
    This would allow a malicious user to effectively hijack XnView and
    execute arbitrary code with the privileges of the user running the
    program.
  
Workaround :

    The system administrator may use the chrpath utility to remove the
    DT_RPATH field from the XnView utilities:
    # emerge app-admin/chrpath
    # chrpath --delete /opt/bin/nconvert /opt/bin/nview /opt/bin/xnview"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200512-18"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All XnView users on the x86 platform should upgrade to the latest
    version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=x11-misc/xnview-1.70-r1'"
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");

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

  script_set_attribute(attribute:"patch_publication_date", value:"2005/12/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2005/12/31");
  script_set_attribute(attribute:"vuln_publication_date", value:"2005/12/29");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2005-2021 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", "Host/Gentoo/arch");

  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);
ourarch = get_kb_item("Host/Gentoo/arch");
if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
if (ourarch !~ "^(x86)$") audit(AUDIT_ARCH_NOT, "x86", ourarch);

flag = 0;

if (qpkg_check(package:"x11-misc/xnview", arch:"x86", unaffected:make_list("ge 1.70-r1"), vulnerable:make_list("lt 1.70-r1"))) 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, "XnView");
}