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CVE-2009-2473 (GCVE-0-2009-2473)

Vulnerability from cvelistv5 – Published: 2009-08-21 17:00 – Updated: 2024-08-07 05:52
VLAI
Summary
neon before 0.28.6, when expat is used, does not properly detect recursion during entity expansion, which allows context-dependent attackers to cause a denial of service (memory and CPU consumption) via a crafted XML document containing a large number of nested entity references, a similar issue to CVE-2003-1564.
Severity
No CVSS data available.
CWE
  • n/a
Assigner
References
URL Tags
http://lists.manyfish.co.uk/pipermail/neon/2009-A… mailing-listx_refsource_MLIST
https://oval.cisecurity.org/repository/search/def… vdb-entrysignaturex_refsource_OVAL
http://support.apple.com/kb/HT4435 x_refsource_CONFIRM
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://www.vupen.com/english/advisories/2009/2341 vdb-entryx_refsource_VUPEN
http://www.mandriva.com/security/advisories?name=… vendor-advisoryx_refsource_MANDRIVA
http://lists.apple.com/archives/security-announce… vendor-advisoryx_refsource_APPLE
http://rhn.redhat.com/errata/RHSA-2013-0131.html vendor-advisoryx_refsource_REDHAT
http://secunia.com/advisories/36371 third-party-advisoryx_refsource_SECUNIA
https://www.redhat.com/archives/fedora-package-an… vendor-advisoryx_refsource_FEDORA
https://www.redhat.com/archives/fedora-package-an… vendor-advisoryx_refsource_FEDORA
https://exchange.xforce.ibmcloud.com/vulnerabilit… vdb-entryx_refsource_XF
http://lists.manyfish.co.uk/pipermail/neon/2009-A… mailing-listx_refsource_MLIST
Date Public
2009-08-18 00:00
Show details on NVD website
To clipboard 

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            "url": "https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00945.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://lists.manyfish.co.uk/pipermail/neon/2009-August/001044.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://lists.manyfish.co.uk/pipermail/neon/2009-August/001045.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00004.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://rhn.redhat.com/errata/RHSA-2013-0131.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "http://secunia.com/advisories/36371"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://support.apple.com/kb/HT4435"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2009:221"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "http://www.vupen.com/english/advisories/2009/2341"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/52633"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9461"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00924.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00945.html"
          }
        ],
        "sourceIdentifier": "secalert@redhat.com",
        "vendorComments": [
          {
            "comment": "Updated neon packages for Red Hat Enterprise Linux 4 and 5 were released via:\nhttps://rhn.redhat.com/errata/RHSA-2009-1452.html\n\nEmbedded copy of the neon library is included in the versions of gnome-vfs2 packages as shipped with Red Hat Enteprise Linux 4 and Red Hat Enteprise Linux 5.  The Red Hat Security Response Team has rated this issue as having low security impact on gnome-vfs2, future updates may address this flaw.",
            "lastModified": "2009-09-22T00:00:00",
            "organization": "Red Hat"
          }
        ],
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-399"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T13:10:52+00:00",
      "cve": "CVE-2009-2473",
      "id": "CVE-2009-2473",
      "initial_release_date": "2009-08-18T00:00:00+00:00",
      "product_status:fixed": "234",
      "product_status:known_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "neon: billion laughs DoS attack",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2009/cve-2009-2473.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-23T00:57:30Z",
      "cve": "CVE-2009-2473",
      "id": "CVE-2009-2473",
      "initial_release_date": "2023-02-15T06:03:19Z",
      "product_status:recommended": "121",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2009-2473",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2009-2473.json",
      "version": "13"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.