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FKIE_CVE-2013-4852

Vulnerability from fkie_nvd - Published: 2013-08-19 23:55 - Updated: 2026-06-16 23:58
Severity
Summary
Integer overflow in PuTTY 0.62 and earlier, WinSCP before 5.1.6, and other products that use PuTTY allows remote SSH servers to cause a denial of service (crash) and possibly execute arbitrary code in certain applications that use PuTTY via a negative size value in an RSA key signature during the SSH handshake, which triggers a heap-based buffer overflow.
References
cve@mitre.orghttp://bugs.debian.org/cgi-bin/bugreport.cgi?bug=718779
cve@mitre.orghttp://lists.opensuse.org/opensuse-updates/2013-08/msg00035.html
cve@mitre.orghttp://lists.opensuse.org/opensuse-updates/2013-08/msg00041.html
cve@mitre.orghttp://secunia.com/advisories/54379Vendor Advisory
cve@mitre.orghttp://secunia.com/advisories/54517
cve@mitre.orghttp://secunia.com/advisories/54533
cve@mitre.orghttp://svn.tartarus.org/sgt?view=revision&sortby=date&revision=9896
cve@mitre.orghttp://winscp.net/tracker/show_bug.cgi?id=1017
cve@mitre.orghttp://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-signature-stringlen.htmlVendor Advisory
cve@mitre.orghttp://www.debian.org/security/2013/dsa-2736
cve@mitre.orghttp://www.search-lab.hu/advisories/secadv-20130722
af854a3a-2127-422b-91ae-364da2661108http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=718779
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-updates/2013-08/msg00035.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-updates/2013-08/msg00041.html
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/54379Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/54517
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/54533
af854a3a-2127-422b-91ae-364da2661108http://svn.tartarus.org/sgt?view=revision&sortby=date&revision=9896
af854a3a-2127-422b-91ae-364da2661108http://winscp.net/tracker/show_bug.cgi?id=1017
af854a3a-2127-422b-91ae-364da2661108http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-signature-stringlen.htmlVendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2013/dsa-2736
af854a3a-2127-422b-91ae-364da2661108http://www.search-lab.hu/advisories/secadv-20130722
Impacted products

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Integer overflow in PuTTY 0.62 and earlier, WinSCP before 5.1.6, and other products that use PuTTY allows remote SSH servers to cause a denial of service (crash) and possibly execute arbitrary code in certain applications that use PuTTY via a negative size value in an RSA key signature during the SSH handshake, which triggers a heap-based buffer overflow."
    },
    {
      "lang": "es",
      "value": "Desbordamiento de entero en PuTTY 0.62 y anteriores, WinSCP anterior a  5.1.6, y otros productos que usan PuTTY, permite a servidores SSH remotos provocar una denegaci\u00f3n de servicio (ca\u00edda) y posiblemente ejecutar c\u00f3digo arbitrario en determinadas aplicaciones que utilizan PuTTY a trav\u00e9s de un tama\u00f1o negativo en el valor de la firma en la clave RSA durante el handshake SSH, que provoca un desbordamiento basado en memoria din\u00e1mica."
    }
  ],
  "id": "CVE-2013-4852",
  "lastModified": "2026-06-16T23:58:00.033",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 6.8,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
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  },
  "published": "2013-08-19T23:55:09.077",
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://winscp.net/tracker/show_bug.cgi?id=1017"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-signature-stringlen.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.debian.org/security/2013/dsa-2736"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.search-lab.hu/advisories/secadv-20130722"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-189"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Taxonomy of the tags.


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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.

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Detection rules are retrieved from Rulezet.

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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.


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