The Oracle Linux 7 host is vulnerable to dnsmasq heap-based buffer overflow, allowing remote attackers to execute arbitrary code and compromise data integrity and system availability. Vulnerabilities referenced in the ELSA-2023-12971 advisory
Reporter | Title | Published | Views | Family All 139 |
---|---|---|---|---|
![]() | dnsmasq security update | 6 Nov 202300:00 | – | oraclelinux |
![]() | dnsmasq security update | 6 Nov 202300:00 | – | oraclelinux |
![]() | dnsmasq security update | 20 Jan 202100:00 | – | oraclelinux |
![]() | Oracle Linux 7 : dnsmasq (ELSA-2023-12972) | 6 Nov 202300:00 | – | nessus |
![]() | Debian DLA-2604-1 : dnsmasq security update | 23 Mar 202100:00 | – | nessus |
![]() | EulerOS 2.0 SP8 : dnsmasq (EulerOS-SA-2021-1138) | 1 Feb 202100:00 | – | nessus |
![]() | NewStart CGSL MAIN 6.02 : dnsmasq Multiple Vulnerabilities (NS-SA-2021-0125) | 27 Oct 202100:00 | – | nessus |
![]() | openSUSE Security Update : dnsmasq (openSUSE-2021-129) | 25 Jan 202100:00 | – | nessus |
![]() | Fedora 33 : dnsmasq (2021-84440e87ba) | 21 Jan 202100:00 | – | nessus |
![]() | dnsmasq < 2.83 Multiple Vulnerabilities (DNSPOOQ) | 19 Jan 202100:00 | – | nessus |
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2023-12971.
##
include('compat.inc');
if (description)
{
script_id(184527);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/10/22");
script_cve_id("CVE-2020-25681", "CVE-2020-25682");
script_xref(name:"IAVA", value:"2021-A-0041");
script_xref(name:"CEA-ID", value:"CEA-2021-0003");
script_name(english:"Oracle Linux 7 : dnsmasq (ELSA-2023-12971)");
script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ELSA-2023-12971 advisory.
- Fixed heap-based buffer overflow in sort_rrset (CVE-2020-25681) [Orabug: 35904921]
Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.
Note that Nessus has not tested for these issues 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-2023-12971.html");
script_set_attribute(attribute:"solution", value:
"Update the affected dnsmasq and / or dnsmasq-utils packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/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: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-2020-25682");
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:"2021/01/19");
script_set_attribute(attribute:"patch_publication_date", value:"2023/11/06");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/11/06");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:oracle:linux:7:9:patch");
script_set_attribute(attribute:"cpe", value:"cpe:/a:oracle:linux:7::latest");
script_set_attribute(attribute:"cpe", value:"cpe:/a:oracle:linux:7::optional_latest");
script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:dnsmasq");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:dnsmasq-utils");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Oracle Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2023-2024 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('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');
var os_release = get_kb_item("Host/RedHat/release");
if (isnull(os_release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:os_release)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 7', 'Oracle Linux ' + os_ver);
if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);
if ('aarch64' >!< cpu) audit(AUDIT_ARCH_NOT, 'aarch64', cpu);
var pkgs = [
{'reference':'dnsmasq-2.76-17.0.3.el7_9.3', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'dnsmasq-utils-2.76-17.0.3.el7_9.3', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE}
];
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 = '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['exists_check'])) exists_check = package_array['exists_check'];
if (reference && _release) {
if (exists_check) {
if (rpm_exists(release:_release, rpm:exists_check) && 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_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, 'dnsmasq / dnsmasq-utils');
}
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