7.7 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
4.9 Medium
CVSS2
Access Vector
Access Complexity
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:S/C:P/I:P/A:N
0.002 Low
EPSS
Percentile
62.1%
It was discovered that Dovecot incorrectly handled client certificates. A remote attacker in possession of a valid certificate with an empty username field could possibly use this issue to impersonate other users.
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-3881-1. 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(121619);
script_version("1.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/21");
script_cve_id("CVE-2019-3814");
script_xref(name:"USN", value:"3881-1");
script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : Dovecot vulnerability (USN-3881-1)");
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 client
certificates. A remote attacker in possession of a valid certificate
with an empty username field could possibly use this issue to
impersonate other users.
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-3881-1");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:P/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:H/PR:L/UI:N/S:U/C:H/I:H/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-3814");
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:"2019/03/27");
script_set_attribute(attribute:"patch_publication_date", value:"2019/02/05");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/02/06");
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:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-: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) 2019-2023 Canonical, Inc. / NASL script (C) 2019-2023 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 || '18.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 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': '14.04', 'pkgname': 'dovecot-core', 'pkgver': '1:2.2.9-1ubuntu2.5'},
{'osver': '14.04', 'pkgname': 'dovecot-dev', 'pkgver': '1:2.2.9-1ubuntu2.5'},
{'osver': '14.04', 'pkgname': 'dovecot-gssapi', 'pkgver': '1:2.2.9-1ubuntu2.5'},
{'osver': '14.04', 'pkgname': 'dovecot-imapd', 'pkgver': '1:2.2.9-1ubuntu2.5'},
{'osver': '14.04', 'pkgname': 'dovecot-ldap', 'pkgver': '1:2.2.9-1ubuntu2.5'},
{'osver': '14.04', 'pkgname': 'dovecot-lmtpd', 'pkgver': '1:2.2.9-1ubuntu2.5'},
{'osver': '14.04', 'pkgname': 'dovecot-managesieved', 'pkgver': '1:2.2.9-1ubuntu2.5'},
{'osver': '14.04', 'pkgname': 'dovecot-mysql', 'pkgver': '1:2.2.9-1ubuntu2.5'},
{'osver': '14.04', 'pkgname': 'dovecot-pgsql', 'pkgver': '1:2.2.9-1ubuntu2.5'},
{'osver': '14.04', 'pkgname': 'dovecot-pop3d', 'pkgver': '1:2.2.9-1ubuntu2.5'},
{'osver': '14.04', 'pkgname': 'dovecot-sieve', 'pkgver': '1:2.2.9-1ubuntu2.5'},
{'osver': '14.04', 'pkgname': 'dovecot-solr', 'pkgver': '1:2.2.9-1ubuntu2.5'},
{'osver': '14.04', 'pkgname': 'dovecot-sqlite', 'pkgver': '1:2.2.9-1ubuntu2.5'},
{'osver': '14.04', 'pkgname': 'mail-stack-delivery', 'pkgver': '1:2.2.9-1ubuntu2.5'},
{'osver': '16.04', 'pkgname': 'dovecot-core', 'pkgver': '1:2.2.22-1ubuntu2.9'},
{'osver': '16.04', 'pkgname': 'dovecot-dev', 'pkgver': '1:2.2.22-1ubuntu2.9'},
{'osver': '16.04', 'pkgname': 'dovecot-gssapi', 'pkgver': '1:2.2.22-1ubuntu2.9'},
{'osver': '16.04', 'pkgname': 'dovecot-imapd', 'pkgver': '1:2.2.22-1ubuntu2.9'},
{'osver': '16.04', 'pkgname': 'dovecot-ldap', 'pkgver': '1:2.2.22-1ubuntu2.9'},
{'osver': '16.04', 'pkgname': 'dovecot-lmtpd', 'pkgver': '1:2.2.22-1ubuntu2.9'},
{'osver': '16.04', 'pkgname': 'dovecot-lucene', 'pkgver': '1:2.2.22-1ubuntu2.9'},
{'osver': '16.04', 'pkgname': 'dovecot-managesieved', 'pkgver': '1:2.2.22-1ubuntu2.9'},
{'osver': '16.04', 'pkgname': 'dovecot-mysql', 'pkgver': '1:2.2.22-1ubuntu2.9'},
{'osver': '16.04', 'pkgname': 'dovecot-pgsql', 'pkgver': '1:2.2.22-1ubuntu2.9'},
{'osver': '16.04', 'pkgname': 'dovecot-pop3d', 'pkgver': '1:2.2.22-1ubuntu2.9'},
{'osver': '16.04', 'pkgname': 'dovecot-sieve', 'pkgver': '1:2.2.22-1ubuntu2.9'},
{'osver': '16.04', 'pkgname': 'dovecot-solr', 'pkgver': '1:2.2.22-1ubuntu2.9'},
{'osver': '16.04', 'pkgname': 'dovecot-sqlite', 'pkgver': '1:2.2.22-1ubuntu2.9'},
{'osver': '16.04', 'pkgname': 'mail-stack-delivery', 'pkgver': '1:2.2.22-1ubuntu2.9'},
{'osver': '18.04', 'pkgname': 'dovecot-core', 'pkgver': '1:2.2.33.2-1ubuntu4.2'},
{'osver': '18.04', 'pkgname': 'dovecot-dev', 'pkgver': '1:2.2.33.2-1ubuntu4.2'},
{'osver': '18.04', 'pkgname': 'dovecot-gssapi', 'pkgver': '1:2.2.33.2-1ubuntu4.2'},
{'osver': '18.04', 'pkgname': 'dovecot-imapd', 'pkgver': '1:2.2.33.2-1ubuntu4.2'},
{'osver': '18.04', 'pkgname': 'dovecot-ldap', 'pkgver': '1:2.2.33.2-1ubuntu4.2'},
{'osver': '18.04', 'pkgname': 'dovecot-lmtpd', 'pkgver': '1:2.2.33.2-1ubuntu4.2'},
{'osver': '18.04', 'pkgname': 'dovecot-managesieved', 'pkgver': '1:2.2.33.2-1ubuntu4.2'},
{'osver': '18.04', 'pkgname': 'dovecot-mysql', 'pkgver': '1:2.2.33.2-1ubuntu4.2'},
{'osver': '18.04', 'pkgname': 'dovecot-pgsql', 'pkgver': '1:2.2.33.2-1ubuntu4.2'},
{'osver': '18.04', 'pkgname': 'dovecot-pop3d', 'pkgver': '1:2.2.33.2-1ubuntu4.2'},
{'osver': '18.04', 'pkgname': 'dovecot-sieve', 'pkgver': '1:2.2.33.2-1ubuntu4.2'},
{'osver': '18.04', 'pkgname': 'dovecot-solr', 'pkgver': '1:2.2.33.2-1ubuntu4.2'},
{'osver': '18.04', 'pkgname': 'dovecot-sqlite', 'pkgver': '1:2.2.33.2-1ubuntu4.2'},
{'osver': '18.04', 'pkgname': 'mail-stack-delivery', 'pkgver': '1:2.2.33.2-1ubuntu4.2'}
];
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');
}
Vendor | Product | Version | CPE |
---|---|---|---|
canonical | ubuntu_linux | dovecot-core | p-cpe:/a:canonical:ubuntu_linux:dovecot-core |
canonical | ubuntu_linux | dovecot-dev | p-cpe:/a:canonical:ubuntu_linux:dovecot-dev |
canonical | ubuntu_linux | dovecot-gssapi | p-cpe:/a:canonical:ubuntu_linux:dovecot-gssapi |
canonical | ubuntu_linux | dovecot-imapd | p-cpe:/a:canonical:ubuntu_linux:dovecot-imapd |
canonical | ubuntu_linux | dovecot-ldap | p-cpe:/a:canonical:ubuntu_linux:dovecot-ldap |
canonical | ubuntu_linux | dovecot-lmtpd | p-cpe:/a:canonical:ubuntu_linux:dovecot-lmtpd |
canonical | ubuntu_linux | dovecot-lucene | p-cpe:/a:canonical:ubuntu_linux:dovecot-lucene |
canonical | ubuntu_linux | dovecot-managesieved | p-cpe:/a:canonical:ubuntu_linux:dovecot-managesieved |
canonical | ubuntu_linux | dovecot-mysql | p-cpe:/a:canonical:ubuntu_linux:dovecot-mysql |
canonical | ubuntu_linux | dovecot-pgsql | p-cpe:/a:canonical:ubuntu_linux:dovecot-pgsql |
7.7 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
4.9 Medium
CVSS2
Access Vector
Access Complexity
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:S/C:P/I:P/A:N
0.002 Low
EPSS
Percentile
62.1%