CVE-2016-2563 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

No CVSS v3.1

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.28635.

Key SSVC decision points have not yet been added.

Vendors	Products
9bis	Kitty
Simon Tatham	Putty

Configuration 1 [-]

OR	cpe:2.3:a:9bis:kitty::::::::
	cpe:2.3:a:simon_tatham:putty::::::::

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
http://lists.opensuse.org/opensuse-updates/2016-05/msg00131.html
http://seclists.org/fulldisclosure/2016/Mar/22
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-pscp-sink-sscanf.html
http://www.securityfocus.com/bid/84296
http://www.securitytracker.com/id/1035257
https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-2563
https://security.gentoo.org/glsa/201606-01

History

Sun, 13 Jul 2025 13:45:00 +0000

Type	Values Removed	Values Added
Metrics	epss `{'score': 0.34654}`	epss `{'score': 0.22887}`

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2016-04-07T23:00:00

Updated: 2024-08-05T23:32:20.848Z

Reserved: 2016-02-25T00:00:00

Link: CVE-2016-2563

Vulnrichment

No data.

NVD

Status : Deferred

Published: 2016-04-07T23:59:07.657

Modified: 2025-04-12T10:46:40.837

Link: CVE-2016-2563

Redhat

No data.

OpenCVE Enrichment

No data.

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "datePublic": "2016-03-05T00:00:00", "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2016-11-30T18:57:01", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"name": "openSUSE-SU-2016:1453", "tags": ["vendor-advisory", "x_refsource_SUSE"], "url": "http://lists.opensuse.org/opensuse-updates/2016-05/msg00131.html"}, {"name": "1035257", "tags": ["vdb-entry", "x_refsource_SECTRACK"], "url": "http://www.securitytracker.com/id/1035257"}, {"name": "GLSA-201606-01", "tags": ["vendor-advisory", "x_refsource_GENTOO"], "url": "https://security.gentoo.org/glsa/201606-01"}, {"name": "84296", "tags": ["vdb-entry", "x_refsource_BID"], "url": "http://www.securityfocus.com/bid/84296"}, {"tags": ["x_refsource_CONFIRM"], "url": "http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-pscp-sink-sscanf.html"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-2563"}, {"name": "20160309 CVE-2016-2563 - PuTTY/PSCP <=0.66 buffer overflow - vuln-pscp-sink-sscanf", "tags": ["mailing-list", "x_refsource_FULLDISC"], "url": "http://seclists.org/fulldisclosure/2016/Mar/22"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2016-2563", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "openSUSE-SU-2016:1453", "refsource": "SUSE", "url": "http://lists.opensuse.org/opensuse-updates/2016-05/msg00131.html"}, {"name": "1035257", "refsource": "SECTRACK", "url": "http://www.securitytracker.com/id/1035257"}, {"name": "GLSA-201606-01", "refsource": "GENTOO", "url": "https://security.gentoo.org/glsa/201606-01"}, {"name": "84296", "refsource": "BID", "url": "http://www.securityfocus.com/bid/84296"}, {"name": "http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-pscp-sink-sscanf.html", "refsource": "CONFIRM", "url": "http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-pscp-sink-sscanf.html"}, {"name": "https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-2563", "refsource": "MISC", "url": "https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-2563"}, {"name": "20160309 CVE-2016-2563 - PuTTY/PSCP <=0.66 buffer overflow - vuln-pscp-sink-sscanf", "refsource": "FULLDISC", "url": "http://seclists.org/fulldisclosure/2016/Mar/22"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T23:32:20.848Z"}, "title": "CVE Program Container", "references": [{"name": "openSUSE-SU-2016:1453", "tags": ["vendor-advisory", "x_refsource_SUSE", "x_transferred"], "url": "http://lists.opensuse.org/opensuse-updates/2016-05/msg00131.html"}, {"name": "1035257", "tags": ["vdb-entry", "x_refsource_SECTRACK", "x_transferred"], "url": "http://www.securitytracker.com/id/1035257"}, {"name": "GLSA-201606-01", "tags": ["vendor-advisory", "x_refsource_GENTOO", "x_transferred"], "url": "https://security.gentoo.org/glsa/201606-01"}, {"name": "84296", "tags": ["vdb-entry", "x_refsource_BID", "x_transferred"], "url": "http://www.securityfocus.com/bid/84296"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-pscp-sink-sscanf.html"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-2563"}, {"name": "20160309 CVE-2016-2563 - PuTTY/PSCP <=0.66 buffer overflow - vuln-pscp-sink-sscanf", "tags": ["mailing-list", "x_refsource_FULLDISC", "x_transferred"], "url": "http://seclists.org/fulldisclosure/2016/Mar/22"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2016-2563", "datePublished": "2016-04-07T23:00:00", "dateReserved": "2016-02-25T00:00:00", "dateUpdated": "2024-08-05T23:32:20.848Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:9bis:kitty:*:*:*:*:*:*:*:*", "matchCriteriaId": "479C8AD6-8701-4170-9065-1B4F96CC81F1", "versionEndIncluding": "0.66.6.3", "vulnerable": true}, {"criteria": "cpe:2.3:a:simon_tatham:putty:*:*:*:*:*:*:*:*", "matchCriteriaId": "090C55DB-A0E2-4281-8A96-C8CB7291F6D1", "versionEndIncluding": "0.66", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Desbordamiento de buffer basado en pila en la utilidad comando-l\u00ednea de SCP en PuTTY en versiones anteriores a 0.67 y KiTTY 0.66.6.3 y versiones anteriores permite a servidores remotos causar una denegaci\u00f3n de servicio (corrupci\u00f3n de memoria de pila) o ejecutar c\u00f3digo arbitrario a trav\u00e9s de una respuesta de tam\u00f1o de archivo SCP-SINK a una petici\u00f3n de descarga SCP."}], "id": "CVE-2016-2563", "lastModified": "2025-04-12T10:46:40.837", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2016-04-07T23:59:07.657", "references": [{"source": "cve@mitre.org", "url": "http://lists.opensuse.org/opensuse-updates/2016-05/msg00131.html"}, {"source": "cve@mitre.org", "url": "http://seclists.org/fulldisclosure/2016/Mar/22"}, {"source": "cve@mitre.org", "tags": ["Patch"], "url": "http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-pscp-sink-sscanf.html"}, {"source": "cve@mitre.org", "url": "http://www.securityfocus.com/bid/84296"}, {"source": "cve@mitre.org", "url": "http://www.securitytracker.com/id/1035257"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-2563"}, {"source": "cve@mitre.org", "url": "https://security.gentoo.org/glsa/201606-01"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.opensuse.org/opensuse-updates/2016-05/msg00131.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://seclists.org/fulldisclosure/2016/Mar/22"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-pscp-sink-sscanf.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securityfocus.com/bid/84296"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securitytracker.com/id/1035257"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://github.com/tintinweb/pub/tree/master/pocs/cve-2016-2563"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.gentoo.org/glsa/201606-01"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}]}