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nessusUbuntu Security Notice (C) 2020-2024 Canonical, Inc. / NASL script (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.UBUNTU_USN-4621-1.NASL
HistoryNov 06, 2020 - 12:00 a.m.

Ubuntu 16.04 LTS / 18.04 LTS : netqmail vulnerabilities (USN-4621-1)

2020-11-0600:00:00
Ubuntu Security Notice (C) 2020-2024 Canonical, Inc. / NASL script (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
12

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

8.8 High

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

0.05 Low

EPSS

Percentile

92.9%

The remote Ubuntu 16.04 LTS / 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4621-1 advisory.

  • Integer overflow in the stralloc_readyplus function in qmail, when running on 64 bit platforms with a large amount of virtual memory, allows remote attackers to cause a denial of service and possibly execute arbitrary code via a large SMTP request. (CVE-2005-1513)

  • commands.c in qmail, when running on 64 bit platforms with a large amount of virtual memory, allows remote attackers to cause a denial of service and possibly execute arbitrary code via a long SMTP command without a space character, which causes an array to be referenced with a negative index. (CVE-2005-1514)

  • Integer signedness error in the qmail_put and substdio_put functions in qmail, when running on 64 bit platforms with a large amount of virtual memory, allows remote attackers to cause a denial of service and possibly execute arbitrary code via a large number of SMTP RCPT TO commands. (CVE-2005-1515)

  • qmail-verify as used in netqmail 1.06 is prone to a mail-address verification bypass vulnerability.
    (CVE-2020-3811)

  • qmail-verify as used in netqmail 1.06 is prone to an information disclosure vulnerability. A local attacker can test for the existence of files and directories anywhere in the filesystem because qmail- verify runs as root and tests for the existence of files in the attacker’s home directory, without dropping its privileges first. (CVE-2020-3812)

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

##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4621-1. 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(142500);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/09");

  script_cve_id(
    "CVE-2005-1513",
    "CVE-2005-1514",
    "CVE-2005-1515",
    "CVE-2020-3811",
    "CVE-2020-3812"
  );
  script_bugtraq_id(89980, 89993, 90000);
  script_xref(name:"USN", value:"4621-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS : netqmail vulnerabilities (USN-4621-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 16.04 LTS / 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as
referenced in the USN-4621-1 advisory.

  - Integer overflow in the stralloc_readyplus function in qmail, when running on 64 bit platforms with a
    large amount of virtual memory, allows remote attackers to cause a denial of service and possibly execute
    arbitrary code via a large SMTP request. (CVE-2005-1513)

  - commands.c in qmail, when running on 64 bit platforms with a large amount of virtual memory, allows remote
    attackers to cause a denial of service and possibly execute arbitrary code via a long SMTP command without
    a space character, which causes an array to be referenced with a negative index. (CVE-2005-1514)

  - Integer signedness error in the qmail_put and substdio_put functions in qmail, when running on 64 bit
    platforms with a large amount of virtual memory, allows remote attackers to cause a denial of service and
    possibly execute arbitrary code via a large number of SMTP RCPT TO commands. (CVE-2005-1515)

  - qmail-verify as used in netqmail 1.06 is prone to a mail-address verification bypass vulnerability.
    (CVE-2020-3811)

  - qmail-verify as used in netqmail 1.06 is prone to an information disclosure vulnerability. A local
    attacker can test for the existence of files and directories anywhere in the filesystem because qmail-
    verify runs as root and tests for the existence of files in the attacker's home directory, without
    dropping its privileges first. (CVE-2020-3812)

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://ubuntu.com/security/notices/USN-4621-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected qmail and / or qmail-uids-gids packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-3811");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2005-1513");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2005/05/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/11/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/11/06");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qmail");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qmail-uids-gids");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2020-2024 Canonical, Inc. / NASL script (C) 2020-2024 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 (! ('16.04' >< os_release || '18.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04', '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': '16.04', 'pkgname': 'qmail', 'pkgver': '1.06-6.2~deb10u1build0.16.04.1'},
    {'osver': '16.04', 'pkgname': 'qmail-uids-gids', 'pkgver': '1.06-6.2~deb10u1build0.16.04.1'},
    {'osver': '18.04', 'pkgname': 'qmail', 'pkgver': '1.06-6.2~deb10u1build0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'qmail-uids-gids', 'pkgver': '1.06-6.2~deb10u1build0.18.04.1'}
];

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, 'qmail / qmail-uids-gids');
}
VendorProductVersionCPE
canonicalubuntu_linux16.04cpe:/o:canonical:ubuntu_linux:16.04:-:lts
canonicalubuntu_linux18.04cpe:/o:canonical:ubuntu_linux:18.04:-:lts
canonicalubuntu_linuxqmailp-cpe:/a:canonical:ubuntu_linux:qmail
canonicalubuntu_linuxqmail-uids-gidsp-cpe:/a:canonical:ubuntu_linux:qmail-uids-gids

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

8.8 High

AI Score

Confidence

High

5 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

0.05 Low

EPSS

Percentile

92.9%