The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the ALAS-2020-1432 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, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2020-1432.
##
include('compat.inc');
if (description)
{
script_id(140207);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/03/21");
script_cve_id("CVE-2019-20907", "CVE-2020-14422");
script_xref(name:"ALAS", value:"2020-1432");
script_name(english:"Amazon Linux AMI : python34, python36, python35 (ALAS-2020-1432)");
script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux AMI host is missing a security update.");
script_set_attribute(attribute:"description", value:
"The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by a
vulnerability as referenced in the ALAS-2020-1432 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://alas.aws.amazon.com/ALAS-2020-1432.html");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/../../faqs.html");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2019-20907.html");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2020-14422.html");
script_set_attribute(attribute:"solution", value:
"Run 'yum update python34' to update your system.
Run 'yum update python36' to update your system.
Run 'yum update python35' to update your system.");
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:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/06/18");
script_set_attribute(attribute:"patch_publication_date", value:"2020/09/03");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/09/04");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python34");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python34-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python34-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python34-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python34-test");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python34-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python35");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python35-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python35-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python35-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python35-test");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python35-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python36");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python36-debug");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python36-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python36-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python36-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python36-test");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python36-tools");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
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:"Amazon Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2020-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");
exit(0);
}
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var alas_release = get_kb_item("Host/AmazonLinux/release");
if (isnull(alas_release) || !strlen(alas_release)) audit(AUDIT_OS_NOT, "Amazon Linux");
var os_ver = pregmatch(pattern: "^AL(A|\d+|-\d+)", string:alas_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "A")
{
if (os_ver == 'A') os_ver = 'AMI';
audit(AUDIT_OS_NOT, "Amazon Linux AMI", "Amazon Linux " + os_ver);
}
if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
var pkgs = [
{'reference':'python34-3.4.10-1.52.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python34-3.4.10-1.52.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python34-debuginfo-3.4.10-1.52.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python34-debuginfo-3.4.10-1.52.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python34-devel-3.4.10-1.52.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python34-devel-3.4.10-1.52.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python34-libs-3.4.10-1.52.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python34-libs-3.4.10-1.52.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python34-test-3.4.10-1.52.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python34-test-3.4.10-1.52.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python34-tools-3.4.10-1.52.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python34-tools-3.4.10-1.52.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python35-3.5.9-1.28.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python35-3.5.9-1.28.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python35-debuginfo-3.5.9-1.28.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python35-debuginfo-3.5.9-1.28.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python35-devel-3.5.9-1.28.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python35-devel-3.5.9-1.28.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python35-libs-3.5.9-1.28.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python35-libs-3.5.9-1.28.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python35-test-3.5.9-1.28.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python35-test-3.5.9-1.28.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python35-tools-3.5.9-1.28.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python35-tools-3.5.9-1.28.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python36-3.6.12-1.19.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python36-3.6.12-1.19.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python36-debug-3.6.12-1.19.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python36-debug-3.6.12-1.19.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python36-debuginfo-3.6.12-1.19.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python36-debuginfo-3.6.12-1.19.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python36-devel-3.6.12-1.19.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python36-devel-3.6.12-1.19.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python36-libs-3.6.12-1.19.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python36-libs-3.6.12-1.19.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python36-test-3.6.12-1.19.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python36-test-3.6.12-1.19.amzn1', 'cpu':'x86_64', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python36-tools-3.6.12-1.19.amzn1', 'cpu':'i686', 'release':'ALA', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python36-tools-3.6.12-1.19.amzn1', 'cpu':'x86_64', 'release':'ALA', '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 = 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_WARNING,
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, "python34 / python34-debuginfo / python34-devel / etc");
}