Vulnerabilities > CVE-2016-10149 - XXE vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
NONE Availability impact
NONE Summary
XML External Entity (XXE) vulnerability in PySAML2 4.4.0 and earlier allows remote attackers to read arbitrary files via a crafted SAML XML request or response.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Nessus
NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3402-1.NASL description It was discovered that PySAML2 incorrectly handled certain SAML XML requests and responses. A remote attacker could use this issue to read arbitrary files. 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 102777 published 2017-08-25 reporter Ubuntu Security Notice (C) 2017-2019 Canonical, Inc. / NASL script (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/102777 title Ubuntu 16.04 LTS / 17.04 : python-pysaml2 vulnerability (USN-3402-1) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Ubuntu Security Notice USN-3402-1. 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(102777); script_version("3.7"); script_cvs_date("Date: 2019/09/18 12:31:47"); script_cve_id("CVE-2016-10149"); script_xref(name:"USN", value:"3402-1"); script_name(english:"Ubuntu 16.04 LTS / 17.04 : python-pysaml2 vulnerability (USN-3402-1)"); 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 PySAML2 incorrectly handled certain SAML XML requests and responses. A remote attacker could use this issue to read arbitrary files. 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." ); script_set_attribute( attribute:"see_also", value:"https://usn.ubuntu.com/3402-1/" ); script_set_attribute( attribute:"solution", value:"Update the affected python-pysaml2 and / or python3-pysaml2 packages." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N"); 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:N/A:N"); 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:"exploit_available", value:"false"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-pysaml2"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-pysaml2"); script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04"); script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:17.04"); script_set_attribute(attribute:"vuln_publication_date", value:"2017/03/24"); script_set_attribute(attribute:"patch_publication_date", value:"2017/08/24"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/25"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"Ubuntu Security Notice (C) 2017-2019 Canonical, Inc. / NASL script (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Ubuntu Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l"); exit(0); } include("audit.inc"); include("ubuntu.inc"); include("misc_func.inc"); if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/Ubuntu/release"); if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu"); release = chomp(release); if (! preg(pattern:"^(16\.04|17\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 16.04 / 17.04", "Ubuntu " + release); if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu); flag = 0; if (ubuntu_check(osver:"16.04", pkgname:"python-pysaml2", pkgver:"3.0.0-3ubuntu1.16.04.1")) flag++; if (ubuntu_check(osver:"16.04", pkgname:"python3-pysaml2", pkgver:"3.0.0-3ubuntu1.16.04.1")) flag++; if (ubuntu_check(osver:"17.04", pkgname:"python-pysaml2", pkgver:"3.0.0-3ubuntu1.17.04.1")) flag++; if (ubuntu_check(osver:"17.04", pkgname:"python3-pysaml2", pkgver:"3.0.0-3ubuntu1.17.04.1")) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_WARNING, extra : ubuntu_report_get() ); exit(0); } else { tested = ubuntu_pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "python-pysaml2 / python3-pysaml2"); }
NASL family Debian Local Security Checks NASL id DEBIAN_DSA-3759.NASL description Matias P. Brutti discovered that python-pysaml2, a Python implementation of the Security Assertion Markup Language 2.0, did not correctly sanitize the XML messages it handled. This allowed a remote attacker to perform XML External Entity attacks, leading to a wide range of exploits. last seen 2020-06-01 modified 2020-06-02 plugin id 96461 published 2017-01-13 reporter This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/96461 title Debian DSA-3759-1 : python-pysaml2 - security update code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DSA-3759. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(96461); script_version("3.10"); script_cvs_date("Date: 2018/11/10 11:49:38"); script_cve_id("CVE-2016-10127", "CVE-2016-10149"); script_xref(name:"DSA", value:"3759"); script_name(english:"Debian DSA-3759-1 : python-pysaml2 - security update"); script_summary(english:"Checks dpkg output for the updated package"); script_set_attribute( attribute:"synopsis", value:"The remote Debian host is missing a security-related update." ); script_set_attribute( attribute:"description", value: "Matias P. Brutti discovered that python-pysaml2, a Python implementation of the Security Assertion Markup Language 2.0, did not correctly sanitize the XML messages it handled. This allowed a remote attacker to perform XML External Entity attacks, leading to a wide range of exploits." ); script_set_attribute( attribute:"see_also", value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=850716" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/jessie/python-pysaml2" ); script_set_attribute( attribute:"see_also", value:"https://www.debian.org/security/2017/dsa-3759" ); script_set_attribute( attribute:"solution", value: "Upgrade the python-pysaml2 packages. For the stable distribution (jessie), this problem has been fixed in version 2.0.0-1+deb8u1." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:L/UI:R/S:C/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:"exploit_available", value:"false"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-pysaml2"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0"); script_set_attribute(attribute:"patch_publication_date", value:"2017/01/12"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/01/13"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Debian Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l"); exit(0); } include("audit.inc"); include("debian_package.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian"); if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING); flag = 0; if (deb_check(release:"8.0", prefix:"python-pysaml2", reference:"2.0.0-1+deb8u1")) flag++; if (deb_check(release:"8.0", prefix:"python-pysaml2-doc", reference:"2.0.0-1+deb8u1")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");
Redhat
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References
- http://www.debian.org/security/2017/dsa-3759
- http://www.openwall.com/lists/oss-security/2017/01/19/5
- http://www.securityfocus.com/bid/97692
- https://access.redhat.com/errata/RHSA-2017:0936
- https://access.redhat.com/errata/RHSA-2017:0937
- https://access.redhat.com/errata/RHSA-2017:0938
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=850716
- https://github.com/rohe/pysaml2/commit/6e09a25d9b4b7aa7a506853210a9a14100b8bc9b
- https://github.com/rohe/pysaml2/issues/366
- https://github.com/rohe/pysaml2/pull/379