CVE-2020-11940 - Vulnerability Details - OpenCVE

Description

In nDPI through 3.2 Stable, an out-of-bounds read in concat_hash_string in ssh.c can be exploited by a network-positioned attacker that can send malformed SSH protocol messages on a network segment monitored by nDPI's library.

Published: 2020-04-23

Score: 7.5 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:ntop:ndpi:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2020-4277	In nDPI through 3.2 Stable, an out-of-bounds read in concat_hash_string in ssh.c can be exploited by a network-positioned attacker that can send malformed SSH protocol messages on a network segment monitored by nDPI's library.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00473.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/ntop/nDPI/commit/3bbb0cd3296023f6f922c71d21a1c374d2b0a435
https://securitylab.github.com/advisories/GHSL-2020-051_052-ntop-ndpi

History

Fri, 11 Jul 2025 13:45:00 +0000

Type	Values Removed	Values Added
Metrics	epss `{'score': 0.00366}`	epss `{'score': 0.00473}`

Subscriptions

Ntop Ndpi

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2020-04-23T14:20:31.000Z

Updated: 2024-08-04T11:42:00.974Z

Reserved: 2020-04-20T00:00:00.000Z

Link: CVE-2020-11940

Vulnrichment

No data.

NVD

Status : Modified

Published: 2020-04-23T15:15:14.153

Modified: 2024-11-21T04:58:56.790

Link: CVE-2020-11940

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-125

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "In nDPI through 3.2 Stable, an out-of-bounds read in concat_hash_string in ssh.c can be exploited by a network-positioned attacker that can send malformed SSH protocol messages on a network segment monitored by nDPI's library."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2020-04-23T14:20:31.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://github.com/ntop/nDPI/commit/3bbb0cd3296023f6f922c71d21a1c374d2b0a435"}, {"tags": ["x_refsource_MISC"], "url": "https://securitylab.github.com/advisories/GHSL-2020-051_052-ntop-ndpi"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2020-11940", "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": "In nDPI through 3.2 Stable, an out-of-bounds read in concat_hash_string in ssh.c can be exploited by a network-positioned attacker that can send malformed SSH protocol messages on a network segment monitored by nDPI's library."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://github.com/ntop/nDPI/commit/3bbb0cd3296023f6f922c71d21a1c374d2b0a435", "refsource": "MISC", "url": "https://github.com/ntop/nDPI/commit/3bbb0cd3296023f6f922c71d21a1c374d2b0a435"}, {"name": "https://securitylab.github.com/advisories/GHSL-2020-051_052-ntop-ndpi", "refsource": "MISC", "url": "https://securitylab.github.com/advisories/GHSL-2020-051_052-ntop-ndpi"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T11:42:00.974Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/ntop/nDPI/commit/3bbb0cd3296023f6f922c71d21a1c374d2b0a435"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://securitylab.github.com/advisories/GHSL-2020-051_052-ntop-ndpi"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2020-11940", "datePublished": "2020-04-23T14:20:31.000Z", "dateReserved": "2020-04-20T00:00:00.000Z", "dateUpdated": "2024-08-04T11:42:00.974Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:ntop:ndpi:*:*:*:*:*:*:*:*", "matchCriteriaId": "97EDB1C6-9886-4C0B-8F09-5A4C52DC5A45", "versionEndIncluding": "3.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "In nDPI through 3.2 Stable, an out-of-bounds read in concat_hash_string in ssh.c can be exploited by a network-positioned attacker that can send malformed SSH protocol messages on a network segment monitored by nDPI's library."}, {"lang": "es", "value": "En nDPI versiones hasta 3.2 Stable, una lectura fuera de l\u00edmites en la funci\u00f3n concat_hash_string en el archivo ssh.c puede ser explotada por un atacante posicionado en red que puede enviar mensajes en protocolo SSH malformado en un segmento de red monitoreado por la biblioteca de nDPI."}], "id": "CVE-2020-11940", "lastModified": "2024-11-21T04:58:56.790", "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}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-04-23T15:15:14.153", "references": [{"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/ntop/nDPI/commit/3bbb0cd3296023f6f922c71d21a1c374d2b0a435"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://securitylab.github.com/advisories/GHSL-2020-051_052-ntop-ndpi"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/ntop/nDPI/commit/3bbb0cd3296023f6f922c71d21a1c374d2b0a435"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://securitylab.github.com/advisories/GHSL-2020-051_052-ntop-ndpi"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}