Vulnerability-Lookup

RHSA-2017:0936

Vulnerability from csaf_redhat - Published: 2017-04-12 13:51 - Updated: 2025-11-21 18:00

Summary

Red Hat Security Advisory: python-defusedxml and python-pysaml2 security update

Severity

Moderate

Notes

Topic: An update for python-defusedxml and python-pysaml2 is now available for Red Hat OpenStack Platform 8.0 (Liberty). Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: The defusedxml package contains several Python-only updates for security vulnerabilities in Python's XML libraries. Defusedxml functions and classes can be used instead of the originals to protect against entity-expansion and DTD-retrieval issues. PySAML2 is the python implementation of SAML Version 2, containing all the functionality for building a SAML2 service provider or an identity provider, to be used in a WSGI environment. Security Fix(es): * An XML entity expansion vulnerability was found in python-pysaml2. A remote attacker could send a crafted request which would cause denial of service through resource exhaustion. (CVE-2016-10149)

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2016-10149

An XML entity expansion vulnerability was found in python-pysaml2. A remote attacker could send a crafted request which would cause denial of service through resource exhaustion.

5.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CWE-776 - Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2017:0936

References

URL

Category

	https://access.redhat.com/errata/RHSA-2017:0936	self
	https://access.redhat.com/security/updates/classi…	external
	https://bugzilla.redhat.com/show_bug.cgi?id=1415710	external
	https://security.access.redhat.com/data/csaf/v2/a…	self
	https://access.redhat.com/security/cve/CVE-2016-10149	self
	https://bugzilla.redhat.com/show_bug.cgi?id=1415710	external
	https://www.cve.org/CVERecord?id=CVE-2016-10149	external
	https://nvd.nist.gov/vuln/detail/CVE-2016-10149	external

JSON

To clipboard

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CVE-2016-10149 (GCVE-0-2016-10149)

Vulnerability from cvelistv5 – Published: 2017-03-24 14:00 – Updated: 2024-08-06 03:14

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.

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	https://github.com/rohe/pysaml2/issues/366	x_refsource_MISC
	https://access.redhat.com/errata/RHSA-2017:0936	vendor-advisoryx_refsource_REDHAT
	http://www.openwall.com/lists/oss-security/2017/01/19/5	mailing-listx_refsource_MLIST
	http://www.securityfocus.com/bid/97692	vdb-entryx_refsource_BID
	http://www.debian.org/security/2017/dsa-3759	vendor-advisoryx_refsource_DEBIAN
	https://github.com/rohe/pysaml2/commit/6e09a25d9b…	x_refsource_CONFIRM
	https://bugs.debian.org/cgi-bin/bugreport.cgi?bug…	x_refsource_CONFIRM
	https://access.redhat.com/errata/RHSA-2017:0938	vendor-advisoryx_refsource_REDHAT
	https://github.com/rohe/pysaml2/pull/379	x_refsource_CONFIRM
	https://access.redhat.com/errata/RHSA-2017:0937	vendor-advisoryx_refsource_REDHAT

Date Public ?

2017-01-19 00:00

Show details on NVD website

JSON

To clipboard

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        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "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."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/rohe/pysaml2/issues/366",
              "refsource": "MISC",
              "url": "https://github.com/rohe/pysaml2/issues/366"
            },
            {
              "name": "RHSA-2017:0936",
              "refsource": "REDHAT",
              "url": "https://access.redhat.com/errata/RHSA-2017:0936"
            },
            {
              "name": "[oss-security] 20170119 Re: CVE request: python-pysaml2 XML external entity attack",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2017/01/19/5"
            },
            {
              "name": "97692",
              "refsource": "BID",
              "url": "http://www.securityfocus.com/bid/97692"
            },
            {
              "name": "DSA-3759",
              "refsource": "DEBIAN",
              "url": "http://www.debian.org/security/2017/dsa-3759"
            },
            {
              "name": "https://github.com/rohe/pysaml2/commit/6e09a25d9b4b7aa7a506853210a9a14100b8bc9b",
              "refsource": "CONFIRM",
              "url": "https://github.com/rohe/pysaml2/commit/6e09a25d9b4b7aa7a506853210a9a14100b8bc9b"
            },
            {
              "name": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=850716",
              "refsource": "CONFIRM",
              "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=850716"
            },
            {
              "name": "RHSA-2017:0938",
              "refsource": "REDHAT",
              "url": "https://access.redhat.com/errata/RHSA-2017:0938"
            },
            {
              "name": "https://github.com/rohe/pysaml2/pull/379",
              "refsource": "CONFIRM",
              "url": "https://github.com/rohe/pysaml2/pull/379"
            },
            {
              "name": "RHSA-2017:0937",
              "refsource": "REDHAT",
              "url": "https://access.redhat.com/errata/RHSA-2017:0937"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2016-10149",
    "datePublished": "2017-03-24T14:00:00.000Z",
    "dateReserved": "2017-01-19T00:00:00.000Z",
    "dateUpdated": "2024-08-06T03:14:42.098Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

RHSA-2017:0936

CVE-2016-10149 (GCVE-0-2016-10149)

Tags

Sightings

Nomenclature