GLSA-200701-28 : thttpd: Unauthenticated remote file access

#%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 200701-28.
#
# 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(24313);
  script_version("1.12");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id("CVE-2007-0664");
  script_xref(name:"GLSA", value:"200701-28");

  script_name(english:"GLSA-200701-28 : thttpd: Unauthenticated remote file access");
  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-200701-28
(thttpd: Unauthenticated remote file access)

    thttpd is vulnerable to an underlying change made to the
    start-stop-daemon command in the current stable Gentoo baselayout
    package (version 1.12.6). In the new version, the start-stop-daemon
    command performs a 'chdir /' command just before starting the thttpd
    process. In the Gentoo default configuration, this causes thttpd to
    start with the document root set to '/', the sytem root directory.
  
Impact :

    When thttpd starts with the document root set to the system root
    directory, all files on the system that are readable by the thttpd
    process can be remotely accessed by unauthenticated users.
  
Workaround :

    Alter the THTTPD_OPTS variable in /etc/conf.d/thttpd to include the
    '-d' option to specify the document root. Alternatively, modify the
    THTTPD_OPTS variable in /etc/conf.d/thttpd to specify a thttpd.conf
    file using the '-C' option, and then configure the 'dir=' directive in
    that thttpd.conf file."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200701-28"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All thttpd users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=www-servers/thttpd-2.25b-r5'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");

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

  script_set_attribute(attribute:"patch_publication_date", value:"2007/01/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2007/02/09");
  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:"www-servers/thttpd", unaffected:make_list("ge 2.25b-r6"), vulnerable:make_list("lt 2.25b-r6"))) flag++;

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