The remote Oracle Linux 6 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2021-9117 advisory.
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 Oracle Linux Security Advisory ELSA-2021-9117.
##
include('compat.inc');
if (description)
{
script_id(147869);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/03/19");
script_cve_id("CVE-2020-8625");
script_name(english:"Oracle Linux 6 : bind (ELSA-2021-9117)");
script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing a security update.");
script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 6 host has packages installed that are affected by a vulnerability as referenced in the
ELSA-2021-9117 advisory.
- BIND servers are vulnerable if they are running an affected version and are configured to use GSS-TSIG
features. In a configuration which uses BIND's default settings the vulnerable code path is not exposed,
but a server can be rendered vulnerable by explicitly setting valid values for the tkey-gssapi-keytab or
tkey-gssapi-credentialconfiguration options. Although the default configuration is not vulnerable, GSS-
TSIG is frequently used in networks where BIND is integrated with Samba, as well as in mixed-server
environments that combine BIND servers with Active Directory domain controllers. The most likely outcome
of a successful exploitation of the vulnerability is a crash of the named process. However, remote code
execution, while unproven, is theoretically possible. Affects: BIND 9.5.0 -> 9.11.27, 9.12.0 -> 9.16.11,
and versions BIND 9.11.3-S1 -> 9.11.27-S1 and 9.16.8-S1 -> 9.16.11-S1 of BIND Supported Preview Edition.
Also release versions 9.17.0 -> 9.17.1 of the BIND 9.17 development branch (CVE-2020-8625)
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://linux.oracle.com/errata/ELSA-2021-9117.html");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/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:H/PR:N/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-2020-8625");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2021/02/17");
script_set_attribute(attribute:"patch_publication_date", value:"2021/03/18");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/03/18");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:6");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-chroot");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-sdb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:bind-utils");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Oracle Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/local_checks_enabled");
exit(0);
}
include('audit.inc');
include('global_settings.inc');
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item('Host/OracleLinux')) audit(AUDIT_OS_NOT, 'Oracle Linux');
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, 'Oracle Linux');
os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 6', 'Oracle Linux ' + os_ver);
if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);
pkgs = [
{'reference':'bind-9.8.2-0.68.rc1.0.1.el6_10.8', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
{'reference':'bind-9.8.2-0.68.rc1.0.1.el6_10.8', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
{'reference':'bind-chroot-9.8.2-0.68.rc1.0.1.el6_10.8', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
{'reference':'bind-chroot-9.8.2-0.68.rc1.0.1.el6_10.8', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
{'reference':'bind-devel-9.8.2-0.68.rc1.0.1.el6_10.8', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
{'reference':'bind-devel-9.8.2-0.68.rc1.0.1.el6_10.8', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
{'reference':'bind-libs-9.8.2-0.68.rc1.0.1.el6_10.8', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
{'reference':'bind-libs-9.8.2-0.68.rc1.0.1.el6_10.8', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
{'reference':'bind-sdb-9.8.2-0.68.rc1.0.1.el6_10.8', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
{'reference':'bind-sdb-9.8.2-0.68.rc1.0.1.el6_10.8', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
{'reference':'bind-utils-9.8.2-0.68.rc1.0.1.el6_10.8', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'},
{'reference':'bind-utils-9.8.2-0.68.rc1.0.1.el6_10.8', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'32'}
];
flag = 0;
foreach package_array ( pkgs ) {
reference = NULL;
release = NULL;
sp = NULL;
cpu = NULL;
el_string = NULL;
rpm_spec_vers_cmp = NULL;
epoch = NULL;
allowmaj = NULL;
rpm_prefix = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) release = 'EL' + 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['rpm_prefix'])) rpm_prefix = package_array['rpm_prefix'];
if (reference && release) {
if (rpm_prefix) {
if (rpm_exists(release:release, rpm:rpm_prefix) && 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++;
} else {
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_WARNING,
extra : rpm_report_get()
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'bind / bind-chroot / bind-devel / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
oracle | linux | 6 | cpe:/o:oracle:linux:6 |
oracle | linux | bind | p-cpe:/a:oracle:linux:bind |
oracle | linux | bind-chroot | p-cpe:/a:oracle:linux:bind-chroot |
oracle | linux | bind-devel | p-cpe:/a:oracle:linux:bind-devel |
oracle | linux | bind-libs | p-cpe:/a:oracle:linux:bind-libs |
oracle | linux | bind-sdb | p-cpe:/a:oracle:linux:bind-sdb |
oracle | linux | bind-utils | p-cpe:/a:oracle:linux:bind-utils |