The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-5010 advisory.
In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation. (CVE-2019-20907)
Lib/ipaddress.py in Python through 3.8.3 improperly computes hash values in the IPv4Interface and IPv6Interface classes, which might allow a remote attacker to cause a denial of service if an application is affected by the performance of a dictionary containing IPv4Interface or IPv6Interface objects, and this attacker can cause many dictionary entries to be created. This is fixed in: v3.5.10, v3.5.10rc1; v3.6.12;
v3.7.9; v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1; v3.9.0, v3.9.0b4, v3.9.0b5, v3.9.0rc1, v3.9.0rc2.
(CVE-2020-14422)
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-2020-5010.
##
include('compat.inc');
if (description)
{
script_id(142745);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2020/11/13");
script_cve_id("CVE-2019-20907", "CVE-2020-14422");
script_name(english:"Oracle Linux 7 : python3 (ELSA-2020-5010)");
script_summary(english:"Checks the rpm output for the updated packages");
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-2020-5010 advisory.
- In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an
infinite loop when opened by tarfile.open, because _proc_pax lacks header validation. (CVE-2019-20907)
- Lib/ipaddress.py in Python through 3.8.3 improperly computes hash values in the IPv4Interface and
IPv6Interface classes, which might allow a remote attacker to cause a denial of service if an application
is affected by the performance of a dictionary containing IPv4Interface or IPv6Interface objects, and this
attacker can cause many dictionary entries to be created. This is fixed in: v3.5.10, v3.5.10rc1; v3.6.12;
v3.7.9; v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1; v3.9.0, v3.9.0b4, v3.9.0b5, v3.9.0rc1, v3.9.0rc2.
(CVE-2020-14422)
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-2020-5010.html");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:L/PR:N/UI:N/S:U/C:N/I:N/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-2019-20907");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/06/18");
script_set_attribute(attribute:"patch_publication_date", value:"2020/11/11");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/11/12");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python3");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python3-debug");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python3-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python3-idle");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python3-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python3-test");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python3-tkinter");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Oracle Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2020 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:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 7', 'Oracle Linux ' + os_ver);
if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);
pkgs = [
{'reference':'python3-3.6.8-18.0.1.el7', 'cpu':'i686', 'release':'7'},
{'reference':'python3-3.6.8-18.0.1.el7', 'cpu':'x86_64', 'release':'7'},
{'reference':'python3-debug-3.6.8-18.0.1.el7', 'cpu':'i686', 'release':'7'},
{'reference':'python3-debug-3.6.8-18.0.1.el7', 'cpu':'x86_64', 'release':'7'},
{'reference':'python3-devel-3.6.8-18.0.1.el7', 'cpu':'i686', 'release':'7'},
{'reference':'python3-devel-3.6.8-18.0.1.el7', 'cpu':'x86_64', 'release':'7'},
{'reference':'python3-idle-3.6.8-18.0.1.el7', 'cpu':'i686', 'release':'7'},
{'reference':'python3-idle-3.6.8-18.0.1.el7', 'cpu':'x86_64', 'release':'7'},
{'reference':'python3-libs-3.6.8-18.0.1.el7', 'cpu':'i686', 'release':'7'},
{'reference':'python3-libs-3.6.8-18.0.1.el7', 'cpu':'x86_64', 'release':'7'},
{'reference':'python3-test-3.6.8-18.0.1.el7', 'cpu':'i686', 'release':'7'},
{'reference':'python3-test-3.6.8-18.0.1.el7', 'cpu':'x86_64', 'release':'7'},
{'reference':'python3-tkinter-3.6.8-18.0.1.el7', 'cpu':'i686', 'release':'7'},
{'reference':'python3-tkinter-3.6.8-18.0.1.el7', 'cpu':'x86_64', 'release':'7'}
];
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, 'python3 / python3-debug / python3-devel / etc');
}