FKIE_CVE-2009-1959

Vulnerability from fkie_nvd - Published: 2009-06-08 01:00 - Updated: 2026-06-16 23:08
Severity
Summary
Off-by-one error in the event_wallops function in fe-common/irc/fe-events.c in irssi 0.8.13 allows remote IRC servers to cause a denial of service (crash) via an empty command, which triggers a one-byte buffer under-read and a one-byte buffer underflow.
References
cve@mitre.orghttp://bugs.irssi.org/index.php?do=details&task_id=662Exploit, Vendor Advisory
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html
cve@mitre.orghttp://secunia.com/advisories/35685
cve@mitre.orghttp://secunia.com/advisories/35812
cve@mitre.orghttp://secunia.com/advisories/36152
cve@mitre.orghttp://www.irssi.org/ChangeLogExploit, Vendor Advisory
cve@mitre.orghttp://www.mandriva.com/security/advisories?name=MDVSA-2009:133
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2009/05/29/3
cve@mitre.orghttp://www.securityfocus.com/bid/35399
cve@mitre.orghttp://www.securitytracker.com/id?1022410
cve@mitre.orghttp://www.ubuntu.com/usn/usn-800-1
cve@mitre.orghttp://www.vupen.com/english/advisories/2009/1596
cve@mitre.orghttp://xorl.wordpress.com/2009/05/28/irssi-event_wallops-off-by-one-readwrite/Exploit
cve@mitre.orghttps://exchange.xforce.ibmcloud.com/vulnerabilities/51184
cve@mitre.orghttps://www.redhat.com/archives/fedora-package-announce/2009-August/msg00146.html
af854a3a-2127-422b-91ae-364da2661108http://bugs.irssi.org/index.php?do=details&task_id=662Exploit, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/35685
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/35812
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/36152
af854a3a-2127-422b-91ae-364da2661108http://www.irssi.org/ChangeLogExploit, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.mandriva.com/security/advisories?name=MDVSA-2009:133
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2009/05/29/3
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/35399
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id?1022410
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/usn-800-1
af854a3a-2127-422b-91ae-364da2661108http://www.vupen.com/english/advisories/2009/1596
af854a3a-2127-422b-91ae-364da2661108http://xorl.wordpress.com/2009/05/28/irssi-event_wallops-off-by-one-readwrite/Exploit
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/51184
af854a3a-2127-422b-91ae-364da2661108https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00146.html
Impacted products
Vendor Product Version
irssi irssi 0.8.13
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:irssi:irssi:0.8.13:*:*:*:*:*:*:*",
              "matchCriteriaId": "1FFA993F-4826-4937-B51D-438CFF4E08EE",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Off-by-one error in the event_wallops function in fe-common/irc/fe-events.c in irssi 0.8.13 allows remote IRC servers to cause a denial of service (crash) via an empty command, which triggers a one-byte buffer under-read and a one-byte buffer underflow."
    },
    {
      "lang": "es",
      "value": "Error de superaci\u00f3n de l\u00edmite (Off-by-one) en loa funci\u00f3n event_wallops en fe-common/irc/fe-events.c en irssi v0.8.13, permite a los servidores de IRC remotos provocar una denegaci\u00f3n de servicio (ca\u00edda) a trav\u00e9s de un comando vac\u00edo, lo que lanza un lectura de b\u00fafer por debajo de un byte (one-byte) o por el desbordamiento de b\u00fafer inferior de un byte (one-byte)."
    }
  ],
  "id": "CVE-2009-1959",
  "lastModified": "2026-06-16T23:08:27.040",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ]
  },
  "published": "2009-06-08T01:00:00.767",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "http://bugs.irssi.org/index.php?do=details\u0026task_id=662"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://secunia.com/advisories/35685"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://secunia.com/advisories/35812"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://secunia.com/advisories/36152"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "http://www.irssi.org/ChangeLog"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2009:133"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.openwall.com/lists/oss-security/2009/05/29/3"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.securityfocus.com/bid/35399"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.securitytracker.com/id?1022410"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.ubuntu.com/usn/usn-800-1"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.vupen.com/english/advisories/2009/1596"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit"
      ],
      "url": "http://xorl.wordpress.com/2009/05/28/irssi-event_wallops-off-by-one-readwrite/"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/51184"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00146.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "http://bugs.irssi.org/index.php?do=details\u0026task_id=662"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://secunia.com/advisories/35685"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://secunia.com/advisories/35812"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://secunia.com/advisories/36152"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "http://www.irssi.org/ChangeLog"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2009:133"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2009/05/29/3"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.securityfocus.com/bid/35399"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.securitytracker.com/id?1022410"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.ubuntu.com/usn/usn-800-1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.vupen.com/english/advisories/2009/1596"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit"
      ],
      "url": "http://xorl.wordpress.com/2009/05/28/irssi-event_wallops-off-by-one-readwrite/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/51184"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00146.html"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-189"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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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.



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.