CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
72.3%
The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2022:7623 advisory.
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 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# AlmaLinux Security Advisory ALSA-2022:7623.
##
include('compat.inc');
if (description)
{
script_id(167299);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/11/30");
script_cve_id("CVE-2022-30550");
script_xref(name:"ALSA", value:"2022:7623");
script_name(english:"AlmaLinux 8 : dovecot (ALSA-2022:7623)");
script_set_attribute(attribute:"synopsis", value:
"The remote AlmaLinux host is missing a security update.");
script_set_attribute(attribute:"description", value:
"The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the
ALSA-2022:7623 advisory.
- An issue was discovered in the auth component in Dovecot 2.2 and 2.3 before 2.3.20. When two passdb
configuration entries exist with the same driver and args settings, incorrect username_filter and
mechanism settings can be applied to passdb definitions. These incorrectly applied settings can lead to an
unintended security configuration and can permit privilege escalation in certain configurations. The
documentation does not advise against the use of passdb definitions that have the same driver and args
settings. One such configuration would be where an administrator wishes to use the same PAM configuration
or passwd file for both normal and master users but use the username_filter setting to restrict which of
the users is able to be a master user. (CVE-2022-30550)
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://errata.almalinux.org/8/ALSA-2022-7623.html");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:L/UI:N/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-2022-30550");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_cwe_id(284);
script_set_attribute(attribute:"vuln_publication_date", value:"2022/07/17");
script_set_attribute(attribute:"patch_publication_date", value:"2022/11/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/11/12");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:dovecot");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:dovecot-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:dovecot-mysql");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:dovecot-pgsql");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:dovecot-pigeonhole");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8::appstream");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8::powertools");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Alma Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 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/AlmaLinux/release", "Host/AlmaLinux/rpm-list", "Host/cpu");
exit(0);
}
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/AlmaLinux/release');
if (isnull(os_release) || 'AlmaLinux' >!< os_release) audit(AUDIT_OS_NOT, 'AlmaLinux');
var os_ver = pregmatch(pattern: "AlmaLinux release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'AlmaLinux');
os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'AlmaLinux 8.x', 'AlmaLinux ' + os_ver);
if (!get_kb_item('Host/AlmaLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'AlmaLinux', cpu);
var pkgs = [
{'reference':'dovecot-2.3.16-3.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'dovecot-devel-2.3.16-3.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'dovecot-mysql-2.3.16-3.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'dovecot-pgsql-2.3.16-3.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
{'reference':'dovecot-pigeonhole-2.3.16-3.el8', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'}
];
var flag = 0;
foreach var package_array ( pkgs ) {
var reference = NULL;
var _release = NULL;
var sp = NULL;
var _cpu = NULL;
var el_string = NULL;
var rpm_spec_vers_cmp = NULL;
var epoch = NULL;
var allowmaj = NULL;
var exists_check = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = 'Alma-' + package_array['release'];
if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : rpm_report_get()
);
exit(0);
}
else
{
var tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'dovecot / dovecot-devel / dovecot-mysql / dovecot-pgsql / etc');
}