ubuntu-cve-2016-2563
Vulnerability from osv_ubuntu
Published
2016-04-07 23:59
Modified
2025-07-16 04:51
Summary
Details

Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6.3 and earlier allows remote servers to cause a denial of service (stack memory corruption) or execute arbitrary code via a crafted SCP-SINK file-size response to an SCP download request.

Severity
9.8 (Critical)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "pterm",
            "binary_version": "0.67-1"
          },
          {
            "binary_name": "pterm-dbgsym",
            "binary_version": "0.67-1"
          },
          {
            "binary_name": "putty",
            "binary_version": "0.67-1"
          },
          {
            "binary_name": "putty-dbgsym",
            "binary_version": "0.67-1"
          },
          {
            "binary_name": "putty-doc",
            "binary_version": "0.67-1"
          },
          {
            "binary_name": "putty-tools",
            "binary_version": "0.67-1"
          },
          {
            "binary_name": "putty-tools-dbgsym",
            "binary_version": "0.67-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "putty",
        "purl": "pkg:deb/ubuntu/putty@0.67-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.67-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.65-2",
        "0.66-1",
        "0.66-2",
        "0.66-3",
        "0.66-4"
      ]
    }
  ],
  "aliases": [],
  "details": "Stack-based buffer overflow in the SCP command-line utility in PuTTY before 0.67 and KiTTY 0.66.6.3 and earlier allows remote servers to cause a denial of service (stack memory corruption) or execute arbitrary code via a crafted SCP-SINK file-size response to an SCP download request.",
  "id": "UBUNTU-CVE-2016-2563",
  "modified": "2025-07-16T04:51:11Z",
  "published": "2016-04-07T23:59:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-2563"
    },
    {
      "type": "REPORT",
      "url": "http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-pscp-sink-sscanf.html"
    },
    {
      "type": "REPORT",
      "url": "http://tartarus.org/~simon-git/gitweb/?p=putty.git;a=commitdiff;h=bc6c15ab5f636e05b7e91883f0031a7e06117947"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-2563"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2016-2563"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2016-2563"
  ],
  "withdrawn": "2025-07-18T16:43:27Z"
}



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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.
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  • 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.