ubuntu-cve-2009-3720
Vulnerability from osv_ubuntu
Published
2009-11-03 00:00
Modified
2026-05-28 04:02
Summary
Details

The updatePosition function in lib/xmltok_impl.c in libexpat in Expat 2.0.1, as used in Python, PyXML, w3c-libwww, and other software, allows context-dependent attackers to cause a denial of service (application crash) via an XML document with crafted UTF-8 sequences that trigger a buffer over-read, a different vulnerability than CVE-2009-2625.

Severity
N/A (UNKNOWN)
low
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
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            "binary_version": "3.1.4~abc9f50-4ubuntu2+esm2"
          },
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      },
      "ranges": [
        {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.4~abc9f50-3",
        "3.1.4~abc9f50-4",
        "3.1.4~abc9f50-4ubuntu2",
        "3.1.4~abc9f50-4ubuntu2+esm1",
        "3.1.4~abc9f50-4ubuntu2+esm2"
      ]
    },
    {
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          }
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      },
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        "name": "cableswig",
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      "package": {
        "ecosystem": "Ubuntu:25.10",
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      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
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          ],
          "type": "ECOSYSTEM"
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      "versions": [
        "2.4.7-6.3",
        "2.4.7-6.3build1",
        "2.4.7-7"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cadaver",
            "binary_version": "0.28+dfsg-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "cadaver",
        "purl": "pkg:deb/ubuntu/cadaver@0.28+dfsg-2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
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            {
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          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.26+dfsg-2",
        "0.28+dfsg-1",
        "0.28+dfsg-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcoin-runtime",
            "binary_version": "4.0.6+ds-1"
          },
          {
            "binary_name": "libcoin80t64",
            "binary_version": "4.0.6+ds-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "coin3",
        "purl": "pkg:deb/ubuntu/coin3@4.0.6+ds-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.0.3+ds-2",
        "4.0.6+ds-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "matanza",
            "binary_version": "0.13+ds2-2build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "matanza",
        "purl": "pkg:deb/ubuntu/matanza@0.13+ds2-2build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
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          "type": "ECOSYSTEM"
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      ],
      "versions": [
        "0.13+ds2-2",
        "0.13+ds2-2build1"
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    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "paraview",
            "binary_version": "6.0.1+dfsg1-7"
          },
          {
            "binary_name": "python3-paraview",
            "binary_version": "6.0.1+dfsg1-7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "paraview",
        "purl": "pkg:deb/ubuntu/paraview@6.0.1+dfsg1-7?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.13.2+dfsg-3",
        "5.13.2+dfsg-3ubuntu1",
        "5.13.2+dfsg-3.1",
        "6.0.1+dfsg1-6ubuntu1",
        "6.0.1+dfsg1-7"
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    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "sitecopy",
            "binary_version": "1:0.16.6-16build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "sitecopy",
        "purl": "pkg:deb/ubuntu/sitecopy@1:0.16.6-16build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
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      "versions": [
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      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "swish-e",
            "binary_version": "2.4.7-7.1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:26.04:LTS",
        "name": "swish-e",
        "purl": "pkg:deb/ubuntu/swish-e@2.4.7-7.1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.7-7",
        "2.4.7-7.1",
        "2.4.7-7.1ubuntu0.1~esm1"
      ]
    }
  ],
  "aliases": [],
  "details": "The updatePosition function in lib/xmltok_impl.c in libexpat in Expat 2.0.1, as used in Python, PyXML, w3c-libwww, and other software, allows context-dependent attackers to cause a denial of service (application crash) via an XML document with crafted UTF-8 sequences that trigger a buffer over-read, a different vulnerability than CVE-2009-2625.",
  "id": "UBUNTU-CVE-2009-3720",
  "modified": "2026-05-28T04:02:08Z",
  "published": "2009-11-03T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2009-3720"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-890-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-890-2"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-890-3"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-890-4"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-890-5"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-890-6"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2009-3720"
    }
  ],
  "related": [
    "USN-890-1",
    "USN-890-2",
    "USN-890-3",
    "USN-890-4",
    "USN-890-5",
    "USN-890-6"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2009-3720"
  ]
}



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Tags
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.