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nessusThis script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.DEBIAN_DLA-2758.NASL
HistorySep 16, 2021 - 12:00 a.m.

Debian DLA-2758-1 : sssd - LTS security update

2021-09-1600:00:00
This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
17

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

9.3 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

0.001 Low

EPSS

Percentile

49.6%

The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-2758 advisory.

  • A flaw was found in SSSD, where the sssctl command was vulnerable to shell command injection via the logs- fetch and cache-expire subcommands. This flaw allows an attacker to trick the root user into running a specially crafted sssctl command, such as via sudo, to gain root access. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-3621)

Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-2758. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(153431);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/01/20");

  script_cve_id("CVE-2021-3621");

  script_name(english:"Debian DLA-2758-1 : sssd - LTS security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-2758
advisory.

  - A flaw was found in SSSD, where the sssctl command was vulnerable to shell command injection via the logs-
    fetch and cache-expire subcommands. This flaw allows an attacker to trick the root user into running a
    specially crafted sssctl command, such as via sudo, to gain root access. The highest threat from this
    vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-3621)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/sssd");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/lts/security/2021/dla-2758");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-3621");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/sssd");
  script_set_attribute(attribute:"solution", value:
"Upgrade the sssd packages.

For Debian 9 stretch, this problem has been fixed in version 1.15.0-3+deb9u2.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-3621");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/08/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/09/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/09/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libipa-hbac-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libipa-hbac0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnss-sss");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpam-sss");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libsss-idmap-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libsss-idmap0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libsss-nss-idmap-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libsss-nss-idmap0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libsss-simpleifp-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libsss-simpleifp0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libsss-sudo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libwbclient-sssd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libwbclient-sssd-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-libipa-hbac");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-libsss-nss-idmap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-sss");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python3-libipa-hbac");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python3-libsss-nss-idmap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python3-sss");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:sssd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:sssd-ad");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:sssd-ad-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:sssd-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:sssd-dbus");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:sssd-ipa");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:sssd-krb5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:sssd-krb5-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:sssd-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:sssd-proxy");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:sssd-tools");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('audit.inc');
include('debian_package.inc');

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var release = get_kb_item('Host/Debian/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Debian');
var release = chomp(release);
if (! preg(pattern:"^(9)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 9.0', 'Debian ' + release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);

var pkgs = [
    {'release': '9.0', 'prefix': 'libipa-hbac-dev', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'libipa-hbac0', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'libnss-sss', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'libpam-sss', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'libsss-idmap-dev', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'libsss-idmap0', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'libsss-nss-idmap-dev', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'libsss-nss-idmap0', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'libsss-simpleifp-dev', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'libsss-simpleifp0', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'libsss-sudo', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'libwbclient-sssd', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'libwbclient-sssd-dev', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'python-libipa-hbac', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'python-libsss-nss-idmap', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'python-sss', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'python3-libipa-hbac', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'python3-libsss-nss-idmap', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'python3-sss', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'sssd', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'sssd-ad', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'sssd-ad-common', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'sssd-common', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'sssd-dbus', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'sssd-ipa', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'sssd-krb5', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'sssd-krb5-common', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'sssd-ldap', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'sssd-proxy', 'reference': '1.15.0-3+deb9u2'},
    {'release': '9.0', 'prefix': 'sssd-tools', 'reference': '1.15.0-3+deb9u2'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (release && prefix && reference) {
    if (deb_check(release:release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libipa-hbac-dev / libipa-hbac0 / libnss-sss / libpam-sss / etc');
}
VendorProductVersionCPE
debiandebian_linuxpython-libsss-nss-idmapp-cpe:/a:debian:debian_linux:python-libsss-nss-idmap
debiandebian_linuxpython-sssp-cpe:/a:debian:debian_linux:python-sss
debiandebian_linuxpython3-libipa-hbacp-cpe:/a:debian:debian_linux:python3-libipa-hbac
debiandebian_linuxpython3-libsss-nss-idmapp-cpe:/a:debian:debian_linux:python3-libsss-nss-idmap
debiandebian_linuxpython3-sssp-cpe:/a:debian:debian_linux:python3-sss
debiandebian_linuxsssdp-cpe:/a:debian:debian_linux:sssd
debiandebian_linuxsssd-adp-cpe:/a:debian:debian_linux:sssd-ad
debiandebian_linuxsssd-ad-commonp-cpe:/a:debian:debian_linux:sssd-ad-common
debiandebian_linuxsssd-commonp-cpe:/a:debian:debian_linux:sssd-common
debiandebian_linuxsssd-dbusp-cpe:/a:debian:debian_linux:sssd-dbus
Rows per page:
1-10 of 311

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

9.3 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

0.001 Low

EPSS

Percentile

49.6%