CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
EPSS
Percentile
91.2%
The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:3252 advisory.
python: Unsafe use of eval() on data retrieved via HTTP in the test suite (CVE-2020-27619)
python-jinja2: ReDoS vulnerability in the urlize filter (CVE-2020-28493)
python-pygments: Infinite loop in SML lexer may lead to DoS (CVE-2021-20270)
python: Web cache poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs by using a semicolon in query parameters (CVE-2021-23336)
python-pygments: ReDoS in multiple lexers (CVE-2021-27291)
python: Stack-based buffer overflow in PyCArg_repr in _ctypes/callproc.c (CVE-2021-3177)
python-babel: Relative path traversal allows attacker to load arbitrary locale files and execute arbitrary code (CVE-2021-42771)
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 70300
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2021:3252. The text
# itself is copyright (C) Red Hat, Inc.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(152778);
script_version("1.10");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/16");
script_cve_id(
"CVE-2020-27619",
"CVE-2020-28493",
"CVE-2021-3177",
"CVE-2021-20270",
"CVE-2021-23336",
"CVE-2021-27291"
);
script_xref(name:"RHSA", value:"2021:3252");
script_xref(name:"IAVA", value:"2021-A-0052-S");
script_xref(name:"IAVA", value:"2021-A-0263-S");
script_name(english:"RHEL 7 : python27 (RHSA-2021:3252)");
script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2021:3252 advisory.
- python: Unsafe use of eval() on data retrieved via HTTP in the test suite (CVE-2020-27619)
- python-jinja2: ReDoS vulnerability in the urlize filter (CVE-2020-28493)
- python-pygments: Infinite loop in SML lexer may lead to DoS (CVE-2021-20270)
- python: Web cache poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs by using a semicolon in
query parameters (CVE-2021-23336)
- python-pygments: ReDoS in multiple lexers (CVE-2021-27291)
- python: Stack-based buffer overflow in PyCArg_repr in _ctypes/callproc.c (CVE-2021-3177)
- python-babel: Relative path traversal allows attacker to load arbitrary locale files and
execute arbitrary code (CVE-2021-42771)
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://access.redhat.com/security/cve/CVE-2020-27619");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-28493");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-3177");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-20270");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-23336");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-27291");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-42771");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2021:3252");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1889886");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1918168");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1922136");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1928707");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1928904");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1940603");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1955615");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-3177");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_cwe_id(20, 22, 95, 120, 400, 444, 835);
script_set_attribute(attribute:"vuln_publication_date", value:"2020/10/22");
script_set_attribute(attribute:"patch_publication_date", value:"2021/08/24");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/08/24");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python27-babel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python27-python");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python27-python-babel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python27-python-debug");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python27-python-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python27-python-jinja2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python27-python-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python27-python-pygments");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python27-python-test");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python27-python-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python27-tkinter");
script_set_attribute(attribute:"generated_plugin", value:"former");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Red Hat Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl", "redhat_repos.nasl");
script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");
exit(0);
}
include('rpm.inc');
include('rhel.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '7')) audit(AUDIT_OS_NOT, 'Red Hat 7.x', 'Red Hat ' + 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$" && 's390' >!< cpu && 'aarch64' >!< cpu && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);
var constraints = [
{
'repo_relative_urls': [
'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/rhscl/1/debug',
'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/rhscl/1/os',
'content/dist/rhel-alt/server/7/7Server/power9/ppc64le/rhscl/1/source/SRPMS',
'content/dist/rhel-alt/server/7/7Server/system-z-a/s390x/rhscl/1/debug',
'content/dist/rhel-alt/server/7/7Server/system-z-a/s390x/rhscl/1/os',
'content/dist/rhel-alt/server/7/7Server/system-z-a/s390x/rhscl/1/source/SRPMS',
'content/dist/rhel/power-le/7/7Server/ppc64le/rhscl/1/debug',
'content/dist/rhel/power-le/7/7Server/ppc64le/rhscl/1/os',
'content/dist/rhel/power-le/7/7Server/ppc64le/rhscl/1/source/SRPMS',
'content/dist/rhel/power/7/7Server/ppc64/rhscl/1/debug',
'content/dist/rhel/power/7/7Server/ppc64/rhscl/1/os',
'content/dist/rhel/power/7/7Server/ppc64/rhscl/1/source/SRPMS',
'content/dist/rhel/server/7/7Server/x86_64/rhscl/1/debug',
'content/dist/rhel/server/7/7Server/x86_64/rhscl/1/os',
'content/dist/rhel/server/7/7Server/x86_64/rhscl/1/source/SRPMS',
'content/dist/rhel/system-z/7/7Server/s390x/rhscl/1/debug',
'content/dist/rhel/system-z/7/7Server/s390x/rhscl/1/os',
'content/dist/rhel/system-z/7/7Server/s390x/rhscl/1/source/SRPMS',
'content/dist/rhel/workstation/7/7Workstation/x86_64/rhscl/1/debug',
'content/dist/rhel/workstation/7/7Workstation/x86_64/rhscl/1/os',
'content/dist/rhel/workstation/7/7Workstation/x86_64/rhscl/1/source/SRPMS'
],
'pkgs': [
{'reference':'python27-babel-0.9.6-10.el7', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-2.7.18-3.el7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-2.7.18-3.el7', 'cpu':'s390x', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-2.7.18-3.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-babel-0.9.6-10.el7', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-debug-2.7.18-3.el7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-debug-2.7.18-3.el7', 'cpu':'s390x', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-debug-2.7.18-3.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-devel-2.7.18-3.el7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-devel-2.7.18-3.el7', 'cpu':'s390x', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-devel-2.7.18-3.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-jinja2-2.6-16.el7', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-libs-2.7.18-3.el7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-libs-2.7.18-3.el7', 'cpu':'s390x', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-libs-2.7.18-3.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-pygments-1.5-5.el7', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-test-2.7.18-3.el7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-test-2.7.18-3.el7', 'cpu':'s390x', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-test-2.7.18-3.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-tools-2.7.18-3.el7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-tools-2.7.18-3.el7', 'cpu':'s390x', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-python-tools-2.7.18-3.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-tkinter-2.7.18-3.el7', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-tkinter-2.7.18-3.el7', 'cpu':'s390x', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python27-tkinter-2.7.18-3.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE}
]
}
];
var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);
var flag = 0;
foreach var constraint_array ( constraints ) {
var repo_relative_urls = NULL;
if (!empty_or_null(constraint_array['repo_relative_urls'])) repo_relative_urls = constraint_array['repo_relative_urls'];
foreach var pkg ( constraint_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(pkg['reference'])) reference = pkg['reference'];
if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
if (reference &&
_release &&
rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
(applicable_repo_urls || (!exists_check || 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++;
}
}
if (flag)
{
var extra = NULL;
if (empty_or_null(applicable_repo_urls)) extra = rpm_report_get() + redhat_report_repo_caveat();
else extra = rpm_report_get() + redhat_report_package_caveat();
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : extra
);
exit(0);
}
else
{
var tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'python27-babel / python27-python / python27-python-babel / etc');
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27619
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28493
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20270
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23336
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27291
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3177
access.redhat.com/errata/RHSA-2021:3252
access.redhat.com/security/cve/CVE-2020-27619
access.redhat.com/security/cve/CVE-2020-28493
access.redhat.com/security/cve/CVE-2021-20270
access.redhat.com/security/cve/CVE-2021-23336
access.redhat.com/security/cve/CVE-2021-27291
access.redhat.com/security/cve/CVE-2021-3177
access.redhat.com/security/cve/CVE-2021-42771
bugzilla.redhat.com/1889886
bugzilla.redhat.com/1918168
bugzilla.redhat.com/1922136
bugzilla.redhat.com/1928707
bugzilla.redhat.com/1928904
bugzilla.redhat.com/1940603
bugzilla.redhat.com/1955615
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
EPSS
Percentile
91.2%