CVE-2013-1762 (GCVE-0-2013-1762)
Vulnerability from cvelistv5 – Published: 2013-03-08 18:00 – Updated: 2024-08-06 15:13
VLAI
EPSS
VEX
Summary
stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, which allows remote proxy servers to execute arbitrary code via a crafted request that triggers a buffer overflow.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
5 references
| URL | Tags |
|---|---|
| http://www.mandriva.com/security/advisories?name=… | vendor-advisoryx_refsource_MANDRIVA |
| http://rhn.redhat.com/errata/RHSA-2013-0714.html | vendor-advisoryx_refsource_REDHAT |
| https://www.stunnel.org/CVE-2013-1762.html | x_refsource_CONFIRM |
| https://wiki.mageia.org/en/Support/Advisories/MGA… | x_refsource_CONFIRM |
| http://www.debian.org/security/2013/dsa-2664 | vendor-advisoryx_refsource_DEBIAN |
Date Public
2013-03-03 00:00
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"vulnerable": true
},
{
"criteria": "cpe:2.3:a:stunnel:stunnel:4.38:*:*:*:*:*:*:*",
"matchCriteriaId": "23893E68-A34A-4CBD-B0A5-A41BF346D4BE",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:stunnel:stunnel:4.39:*:*:*:*:*:*:*",
"matchCriteriaId": "F691D200-26B8-41AC-8123-78A853DFEAF6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:stunnel:stunnel:4.40:*:*:*:*:*:*:*",
"matchCriteriaId": "D8E83FE3-B2C1-4DDB-8BD4-48A1DCD25496",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:stunnel:stunnel:4.41:*:*:*:*:*:*:*",
"matchCriteriaId": "7F82A3BF-F540-4C6B-846F-4E614849EDC8",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:stunnel:stunnel:4.42:*:*:*:*:*:*:*",
"matchCriteriaId": "3C88D6AE-BE42-4E3A-9B95-A9E5A3C7ED11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:stunnel:stunnel:4.43:*:*:*:*:*:*:*",
"matchCriteriaId": "F9E334EF-1A35-4028-8B60-CA6A6890E490",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:stunnel:stunnel:4.44:*:*:*:*:*:*:*",
"matchCriteriaId": "73DF6D41-9CD0-4038-9571-C76B73B4E225",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:stunnel:stunnel:4.45:*:*:*:*:*:*:*",
"matchCriteriaId": "0C89A59C-F6F3-4F2F-AA8A-86E8B259245D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:stunnel:stunnel:4.46:*:*:*:*:*:*:*",
"matchCriteriaId": "67AF1A8D-9C55-4488-9E03-F0D824912BC7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:stunnel:stunnel:4.47:*:*:*:*:*:*:*",
"matchCriteriaId": "969EC7D0-FB81-42FB-8089-E5EC1D107F18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:stunnel:stunnel:4.48:*:*:*:*:*:*:*",
"matchCriteriaId": "F66E4DD8-8D15-4DC1-BADD-B6BB6697313E",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:stunnel:stunnel:4.49:*:*:*:*:*:*:*",
"matchCriteriaId": "4015B215-4FFA-423E-A7E2-7F43ADEBA326",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:stunnel:stunnel:4.50:*:*:*:*:*:*:*",
"matchCriteriaId": "84826AED-EEA7-4527-9A8E-258641B5C637",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:stunnel:stunnel:4.51:*:*:*:*:*:*:*",
"matchCriteriaId": "9189ECAB-E192-476B-87E1-339AF9BFA4F2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:stunnel:stunnel:4.52:*:*:*:*:*:*:*",
"matchCriteriaId": "C3889099-4FEC-4133-9E7D-A8E529DE939A",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:stunnel:stunnel:4.53:*:*:*:*:*:*:*",
"matchCriteriaId": "0F208151-3577-479E-B554-C94708D3D727",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, which allows remote proxy servers to execute arbitrary code via a crafted request that triggers a buffer overflow."
},
{
"lang": "es",
"value": "stunnel v4.21 a v4.54, cuando el protocolo de negociaci\u00f3n CONNECT y la autenticaci\u00f3n NTLM est\u00e1n habilitadas, no realiza la conversi\u00f3n de enteros correctamente, lo que permite ejecutar c\u00f3digo de su elecci\u00f3n a servidores remotos proxy a trav\u00e9s de una solicitud hecha a mano que dispara un desbordamiento de b\u00fafer.\r\n"
}
],
"id": "CVE-2013-1762",
"lastModified": "2026-04-29T01:13:23.040",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "HIGH",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 6.6,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:C",
"version": "2.0"
},
"exploitabilityScore": 4.9,
"impactScore": 8.5,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2013-03-08T18:55:01.743",
"references": [
{
"source": "cve@mitre.org",
"url": "http://rhn.redhat.com/errata/RHSA-2013-0714.html"
},
{
"source": "cve@mitre.org",
"url": "http://www.debian.org/security/2013/dsa-2664"
},
{
"source": "cve@mitre.org",
"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2013:130"
},
{
"source": "cve@mitre.org",
"url": "https://wiki.mageia.org/en/Support/Advisories/MGASA-2013-0097"
},
{
"source": "cve@mitre.org",
"tags": [
"Vendor Advisory"
],
"url": "https://www.stunnel.org/CVE-2013-1762.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://rhn.redhat.com/errata/RHSA-2013-0714.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.debian.org/security/2013/dsa-2664"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2013:130"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://wiki.mageia.org/en/Support/Advisories/MGASA-2013-0097"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://www.stunnel.org/CVE-2013-1762.html"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-94"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2025-11-21T12:44:40+00:00",
"cve": "CVE-2013-1762",
"id": "CVE-2013-1762",
"initial_release_date": "2013-03-03T00:00:00+00:00",
"product_status:fixed": "36",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Stunnel: buffer overflow vulnerability due to incorrect integer conversion in the NTLM authentication of the CONNECT protocol negotiation",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2013/cve-2013-1762.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-02T09:14:25Z",
"cve": "CVE-2013-1762",
"id": "CVE-2013-1762",
"initial_release_date": "2023-02-15T05:40:10Z",
"product_status:known_not_affected": "45",
"product_status:recommended": "45",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2013-1762",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2013-1762.json",
"version": "12"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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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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