Vulnerabilities > CVE-2019-14235 - Uncontrolled Recursion vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
An issue was discovered in Django 1.11.x before 1.11.23, 2.1.x before 2.1.11, and 2.2.x before 2.2.4. If passed certain inputs, django.utils.encoding.uri_to_iri could lead to significant memory usage due to a recursion when repercent-encoding invalid UTF-8 octet sequences.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- XML Nested Payloads Applications often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. By nesting XML data and causing this data to be continuously self-referential, an attacker can cause the XML parser to consume more resources while processing, causing excessive memory consumption and CPU utilization. An attacker's goal is to leverage parser failure to his or her advantage. In most cases this type of an attack will result in a denial of service due to an application becoming unstable, freezing, or crash. However it may be possible to cause a crash resulting in arbitrary code execution, leading to a jump from the data plane to the control plane [R.230.1].
- XML Oversized Payloads Applications often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. By supplying oversized payloads in input vectors that will be processed by the XML parser, an attacker can cause the XML parser to consume more resources while processing, causing excessive memory consumption and CPU utilization, and potentially cause execution of arbitrary code. An attacker's goal is to leverage parser failure to his or her advantage. In many cases this type of an attack will result in a denial of service due to an application becoming unstable, freezing, or crash. However it is possible to cause a crash resulting in arbitrary code execution, leading to a jump from the data plane to the control plane [R.231.1].
- Violating Implicit Assumptions Regarding XML Content (aka XML Denial of Service (XDoS)) XML Denial of Service (XDoS) can be applied to any technology that utilizes XML data. This is, of course, most distributed systems technology including Java, .Net, databases, and so on. XDoS is most closely associated with web services, SOAP, and Rest, because remote service requesters can post malicious XML payloads to the service provider designed to exhaust the service provider's memory, CPU, and/or disk space. The main weakness in XDoS is that the service provider generally must inspect, parse, and validate the XML messages to determine routing, workflow, security considerations, and so on. It is exactly these inspection, parsing, and validation routines that XDoS targets. There are three primary attack vectors that XDoS can navigate Target CPU through recursion: attacker creates a recursive payload and sends to service provider Target memory through jumbo payloads: service provider uses DOM to parse XML. DOM creates in memory representation of XML document, but when document is very large (for example, north of 1 Gb) service provider host may exhaust memory trying to build memory objects. XML Ping of death: attack service provider with numerous small files that clog the system. All of the above attacks exploit the loosely coupled nature of web services, where the service provider has little to no control over the service requester and any messages the service requester sends.
- XML Parser Attack Applications often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. These adverse effects may include the parser crashing, consuming too much of a resource, executing too slowly, executing code supplied by an attacker, allowing usage of unintended system functionality, etc. An attacker's goal is to leverage parser failure to his or her advantage. In some cases it may be possible to jump from the data plane to the control plane via bad data being passed to an XML parser. [R.99.1]
Nessus
NASL family Fedora Local Security Checks NASL id FEDORA_2019-647F74CE51.NASL description fixes for CVE-2019-14232 to 14235 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 127936 published 2019-08-20 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127936 title Fedora 30 : python-django (2019-647f74ce51) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Fedora Security Advisory FEDORA-2019-647f74ce51. # include("compat.inc"); if (description) { script_id(127936); script_version("1.3"); script_cvs_date("Date: 2020/01/02"); script_cve_id("CVE-2019-14232", "CVE-2019-14233", "CVE-2019-14234", "CVE-2019-14235"); script_xref(name:"FEDORA", value:"2019-647f74ce51"); script_name(english:"Fedora 30 : python-django (2019-647f74ce51)"); script_summary(english:"Checks rpm output for the updated package."); script_set_attribute( attribute:"synopsis", value:"The remote Fedora host is missing a security update." ); script_set_attribute( attribute:"description", value: "fixes for CVE-2019-14232 to 14235 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues." ); script_set_attribute( attribute:"see_also", value:"https://bodhi.fedoraproject.org/updates/FEDORA-2019-647f74ce51" ); script_set_attribute( attribute:"solution", value:"Update the affected python-django package." ); 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:U/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:U/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:python-django"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:30"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/08/02"); script_set_attribute(attribute:"patch_publication_date", value:"2019/08/15"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/20"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Fedora Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list"); 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); release = get_kb_item("Host/RedHat/release"); if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora"); os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora"); os_ver = os_ver[1]; if (! preg(pattern:"^30([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 30", "Fedora " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu); flag = 0; if (rpm_check(release:"FC30", reference:"python-django-2.1.11-1.fc30")) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_HOLE, 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, "python-django"); }
NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-4084-1.NASL description It was discovered that Django incorrectly handled the Truncator function. A remote attacker could possibly use this issue to cause Django to consume resources, leading to a denial of service. (CVE-2019-14232) It was discovered that Django incorrectly handled the strip_tags function. A remote attacker could possibly use this issue to cause Django to consume resources, leading to a denial of service. (CVE-2019-14233) It was discovered that Django incorrectly handled certain lookups in the PostgreSQL support. A remote attacker could possibly use this issue to perform SQL injection attacks. (CVE-2019-14234) It was discovered that Django incorrectly handled certain invalid UTF-8 octet sequences. A remote attacker could possibly use this issue to cause Django to consume resources, leading to a denial of service. (CVE-2019-14235). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 127801 published 2019-08-12 reporter Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127801 title Ubuntu 16.04 LTS / 18.04 LTS / 19.04 : python-django vulnerabilities (USN-4084-1) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Ubuntu Security Notice USN-4084-1. The text # itself is copyright (C) Canonical, Inc. See # <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered # trademark of Canonical, Inc. # include("compat.inc"); if (description) { script_id(127801); script_version("1.5"); script_cvs_date("Date: 2020/01/02"); script_cve_id("CVE-2019-14232", "CVE-2019-14233", "CVE-2019-14234", "CVE-2019-14235"); script_xref(name:"USN", value:"4084-1"); script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 19.04 : python-django vulnerabilities (USN-4084-1)"); script_summary(english:"Checks dpkg output for updated packages."); script_set_attribute( attribute:"synopsis", value: "The remote Ubuntu host is missing one or more security-related patches." ); script_set_attribute( attribute:"description", value: "It was discovered that Django incorrectly handled the Truncator function. A remote attacker could possibly use this issue to cause Django to consume resources, leading to a denial of service. (CVE-2019-14232) It was discovered that Django incorrectly handled the strip_tags function. A remote attacker could possibly use this issue to cause Django to consume resources, leading to a denial of service. (CVE-2019-14233) It was discovered that Django incorrectly handled certain lookups in the PostgreSQL support. A remote attacker could possibly use this issue to perform SQL injection attacks. (CVE-2019-14234) It was discovered that Django incorrectly handled certain invalid UTF-8 octet sequences. A remote attacker could possibly use this issue to cause Django to consume resources, leading to a denial of service. (CVE-2019-14235). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. 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NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-202004-17.NASL description The remote host is affected by the vulnerability described in GLSA-202004-17 (Django: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Django. Please review the CVE identifiers referenced below for details. Impact : A remote attacker, by sending specially crafted input, could possibly cause a Denial of Service condition, or alter the database. Workaround : There is no known workaround at this time. last seen 2020-05-08 modified 2020-05-01 plugin id 136216 published 2020-05-01 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136216 title GLSA-202004-17 : Django: Multiple vulnerabilities code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Gentoo Linux Security Advisory GLSA 202004-17. # # The advisory text is Copyright (C) 2001-2020 Gentoo Foundation, Inc. # and licensed under the Creative Commons - Attribution / Share Alike # license. See http://creativecommons.org/licenses/by-sa/3.0/ # include("compat.inc"); if (description) { script_id(136216); script_version("1.2"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/07"); script_cve_id("CVE-2019-12308", "CVE-2019-14232", "CVE-2019-14233", "CVE-2019-14234", "CVE-2019-14235", "CVE-2019-19118", "CVE-2019-19844", "CVE-2020-7471", "CVE-2020-9402"); script_xref(name:"GLSA", value:"202004-17"); script_name(english:"GLSA-202004-17 : Django: Multiple vulnerabilities"); script_summary(english:"Checks for updated package(s) in /var/db/pkg"); script_set_attribute( attribute:"synopsis", value: "The remote Gentoo host is missing one or more security-related patches." ); script_set_attribute( attribute:"description", value: "The remote host is affected by the vulnerability described in GLSA-202004-17 (Django: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Django. Please review the CVE identifiers referenced below for details. Impact : A remote attacker, by sending specially crafted input, could possibly cause a Denial of Service condition, or alter the database. Workaround : There is no known workaround at this time." ); script_set_attribute( attribute:"see_also", value:"https://security.gentoo.org/glsa/202004-17" ); script_set_attribute( attribute:"solution", value: "All Django users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose '>=dev-python/django-2.2.11'" ); 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:POC/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:P/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:django"); script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/06/03"); script_set_attribute(attribute:"patch_publication_date", value:"2020/04/30"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/01"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Gentoo Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("qpkg.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo"); if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING); flag = 0; if (qpkg_check(package:"dev-python/django", unaffected:make_list("ge 2.2.11"), vulnerable:make_list("lt 2.2.11"))) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get()); else security_hole(0); exit(0); } else { tested = qpkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Django"); }
NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_6E65DFEAB61411E9A3A21506E15611CC.NASL description Django release notes : CVE-2019-14232: Denial-of-service possibility in django.utils.text.Truncator If django.utils.text.Truncator last seen 2020-06-01 modified 2020-06-02 plugin id 127547 published 2019-08-12 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127547 title FreeBSD : Django -- multiple vulnerabilities (6e65dfea-b614-11e9-a3a2-1506e15611cc) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-4498.NASL description Several vulnerabilities were discovered in python-django, a web development framework. They could lead to remote denial-of-service or SQL injection, last seen 2020-06-01 modified 2020-06-02 plugin id 127822 published 2019-08-13 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127822 title Debian DSA-4498-1 : python-django - security update NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-1839.NASL description This update for python-Django fixes the following issues : Security issues fixed : 	 - CVE-2019-11358: Fixed prototype pollution. - CVE-2019-12308: Fixed XSS in AdminURLFieldWidget (bsc#1136468) - CVE-2019-12781: Fixed incorrect HTTP detection with reverse-proxy connecting via HTTPS (bsc#1139945). - CVE-2019-14232: Fixed denial-of-service possibility in ``django.utils.text.Truncator`` (bsc#1142880). - CVE-2019-14233: Fixed denial-of-service possibility in ``strip_tags()`` (bsc#1142882). - CVE-2019-14234: Fixed SQL injection possibility in key and index lookups for ``JSONField``/``HStoreField`` (bsc#1142883). - CVE-2019-14235: Fixed potential memory exhaustion in ``django.utils.encoding.uri_to_iri()`` (bsc#1142885). Non-security issues fixed : - Fixed a migration crash on PostgreSQL when adding a check constraint with a contains lookup on DateRangeField or DateTimeRangeField, if the right hand side of an expression is the same type. last seen 2020-06-01 modified 2020-06-02 plugin id 127742 published 2019-08-12 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127742 title openSUSE Security Update : python-Django (openSUSE-2019-1839)
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References
- https://www.djangoproject.com/weblog/2019/aug/01/security-releases/
- https://docs.djangoproject.com/en/dev/releases/security/
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00006.html
- https://seclists.org/bugtraq/2019/Aug/15
- https://www.debian.org/security/2019/dsa-4498
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00025.html
- https://security.netapp.com/advisory/ntap-20190828-0002/
- https://security.gentoo.org/glsa/202004-17
- https://groups.google.com/forum/#%21topic/django-announce/jIoju2-KLDs
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STVX7X7IDWAH5SKE6MBMY3TEI6ZODBTK/