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nessusUbuntu Security Notice (C) 2018-2023 Canonical, Inc. / NASL script (C) 2018-2023 and is owned by Tenable, Inc. or an Affiliate thereof.UBUNTU_USN-3556-1.NASL
HistoryFeb 02, 2018 - 12:00 a.m.

Ubuntu 14.04 LTS / 16.04 LTS : Dovecot vulnerability (USN-3556-1)

2018-02-0200:00:00
Ubuntu Security Notice (C) 2018-2023 Canonical, Inc. / NASL script (C) 2018-2023 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
10

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

0.009 Low

EPSS

Percentile

82.6%

It was discovered that Dovecot incorrectly handled certain authentications. An attacker could possibly use this to cause a denial of service.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3556-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include('compat.inc');

if (description)
{
  script_id(106582);
  script_version("3.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/20");

  script_cve_id("CVE-2017-15132");
  script_xref(name:"USN", value:"3556-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS : Dovecot vulnerability (USN-3556-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"It was discovered that Dovecot incorrectly handled certain
authentications. An attacker could possibly use this to cause a denial
of service.

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-3556-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  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:N/S:U/C:N/I:N/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-2017-15132");

  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:"2018/01/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/02/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/02");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dovecot-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dovecot-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dovecot-gssapi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dovecot-imapd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dovecot-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dovecot-lmtpd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dovecot-lucene");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dovecot-managesieved");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dovecot-mysql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dovecot-pgsql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dovecot-pop3d");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dovecot-sieve");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dovecot-solr");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dovecot-sqlite");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mail-stack-delivery");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2018-2023 Canonical, Inc. / NASL script (C) 2018-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('14.04' >< os_release || '16.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 16.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '14.04', 'pkgname': 'dovecot-core', 'pkgver': '1:2.2.9-1ubuntu2.3'},
    {'osver': '14.04', 'pkgname': 'dovecot-dev', 'pkgver': '1:2.2.9-1ubuntu2.3'},
    {'osver': '14.04', 'pkgname': 'dovecot-gssapi', 'pkgver': '1:2.2.9-1ubuntu2.3'},
    {'osver': '14.04', 'pkgname': 'dovecot-imapd', 'pkgver': '1:2.2.9-1ubuntu2.3'},
    {'osver': '14.04', 'pkgname': 'dovecot-ldap', 'pkgver': '1:2.2.9-1ubuntu2.3'},
    {'osver': '14.04', 'pkgname': 'dovecot-lmtpd', 'pkgver': '1:2.2.9-1ubuntu2.3'},
    {'osver': '14.04', 'pkgname': 'dovecot-managesieved', 'pkgver': '1:2.2.9-1ubuntu2.3'},
    {'osver': '14.04', 'pkgname': 'dovecot-mysql', 'pkgver': '1:2.2.9-1ubuntu2.3'},
    {'osver': '14.04', 'pkgname': 'dovecot-pgsql', 'pkgver': '1:2.2.9-1ubuntu2.3'},
    {'osver': '14.04', 'pkgname': 'dovecot-pop3d', 'pkgver': '1:2.2.9-1ubuntu2.3'},
    {'osver': '14.04', 'pkgname': 'dovecot-sieve', 'pkgver': '1:2.2.9-1ubuntu2.3'},
    {'osver': '14.04', 'pkgname': 'dovecot-solr', 'pkgver': '1:2.2.9-1ubuntu2.3'},
    {'osver': '14.04', 'pkgname': 'dovecot-sqlite', 'pkgver': '1:2.2.9-1ubuntu2.3'},
    {'osver': '14.04', 'pkgname': 'mail-stack-delivery', 'pkgver': '1:2.2.9-1ubuntu2.3'},
    {'osver': '16.04', 'pkgname': 'dovecot-core', 'pkgver': '1:2.2.22-1ubuntu2.6'},
    {'osver': '16.04', 'pkgname': 'dovecot-dev', 'pkgver': '1:2.2.22-1ubuntu2.6'},
    {'osver': '16.04', 'pkgname': 'dovecot-gssapi', 'pkgver': '1:2.2.22-1ubuntu2.6'},
    {'osver': '16.04', 'pkgname': 'dovecot-imapd', 'pkgver': '1:2.2.22-1ubuntu2.6'},
    {'osver': '16.04', 'pkgname': 'dovecot-ldap', 'pkgver': '1:2.2.22-1ubuntu2.6'},
    {'osver': '16.04', 'pkgname': 'dovecot-lmtpd', 'pkgver': '1:2.2.22-1ubuntu2.6'},
    {'osver': '16.04', 'pkgname': 'dovecot-lucene', 'pkgver': '1:2.2.22-1ubuntu2.6'},
    {'osver': '16.04', 'pkgname': 'dovecot-managesieved', 'pkgver': '1:2.2.22-1ubuntu2.6'},
    {'osver': '16.04', 'pkgname': 'dovecot-mysql', 'pkgver': '1:2.2.22-1ubuntu2.6'},
    {'osver': '16.04', 'pkgname': 'dovecot-pgsql', 'pkgver': '1:2.2.22-1ubuntu2.6'},
    {'osver': '16.04', 'pkgname': 'dovecot-pop3d', 'pkgver': '1:2.2.22-1ubuntu2.6'},
    {'osver': '16.04', 'pkgname': 'dovecot-sieve', 'pkgver': '1:2.2.22-1ubuntu2.6'},
    {'osver': '16.04', 'pkgname': 'dovecot-solr', 'pkgver': '1:2.2.22-1ubuntu2.6'},
    {'osver': '16.04', 'pkgname': 'dovecot-sqlite', 'pkgver': '1:2.2.22-1ubuntu2.6'},
    {'osver': '16.04', 'pkgname': 'mail-stack-delivery', 'pkgver': '1:2.2.22-1ubuntu2.6'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'dovecot-core / dovecot-dev / dovecot-gssapi / dovecot-imapd / etc');
}
VendorProductVersionCPE
canonicalubuntu_linuxdovecot-corep-cpe:/a:canonical:ubuntu_linux:dovecot-core
canonicalubuntu_linuxdovecot-devp-cpe:/a:canonical:ubuntu_linux:dovecot-dev
canonicalubuntu_linuxdovecot-gssapip-cpe:/a:canonical:ubuntu_linux:dovecot-gssapi
canonicalubuntu_linuxdovecot-imapdp-cpe:/a:canonical:ubuntu_linux:dovecot-imapd
canonicalubuntu_linuxdovecot-ldapp-cpe:/a:canonical:ubuntu_linux:dovecot-ldap
canonicalubuntu_linuxdovecot-lmtpdp-cpe:/a:canonical:ubuntu_linux:dovecot-lmtpd
canonicalubuntu_linuxdovecot-lucenep-cpe:/a:canonical:ubuntu_linux:dovecot-lucene
canonicalubuntu_linuxdovecot-managesievedp-cpe:/a:canonical:ubuntu_linux:dovecot-managesieved
canonicalubuntu_linuxdovecot-mysqlp-cpe:/a:canonical:ubuntu_linux:dovecot-mysql
canonicalubuntu_linuxdovecot-pgsqlp-cpe:/a:canonical:ubuntu_linux:dovecot-pgsql
Rows per page:
1-10 of 171

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

0.009 Low

EPSS

Percentile

82.6%