GLSA-200502-28 : PuTTY: Remote code execution

#%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 200502-28.
#
# The advisory text is Copyright (C) 2001-2018 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(17164);
  script_version("1.24");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id("CVE-2005-0467");
  script_xref(name:"GLSA", value:"200502-28");

  script_name(english:"GLSA-200502-28 : PuTTY: Remote code execution");
  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-200502-28
(PuTTY: Remote code execution)

    Two vulnerabilities have been discovered in the PSCP and PSFTP
    clients, which can be triggered by the SFTP server itself. These issues
    are caused by the improper handling of the FXP_READDIR response, along
    with other string fields.
  
Impact :

    An attacker can setup a malicious SFTP server that would send
    these malformed responses to a client, potentially allowing the
    execution of arbitrary code on their system.
  
Workaround :

    There is no known workaround at this time."
  );
  # http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-sftp-readdir.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?009f4000"
  );
  # http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-sftp-string.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?eee581a9"
  );
  # http://www.idefense.com/application/poi/display?id=201&type=vulnerabilities
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?0de7d285"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200502-28"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All PuTTY users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=net-misc/putty-0.57'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");

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

  script_set_attribute(attribute:"patch_publication_date", value:"2005/02/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2005/02/22");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2005-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  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:"net-misc/putty", unaffected:make_list("ge 0.57"), vulnerable:make_list("lt 0.57"))) 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, "PuTTY");
}