FKIE_CVE-2013-2061
Vulnerability from fkie_nvd - Published: 2013-11-18 02:55 - Updated: 2026-06-16 23:52
Severity
Summary
The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode, allows remote attackers to obtain sensitive information via a timing attack involving an HMAC comparison function that does not run in constant time and a padding oracle attack on the CBC mode cipher.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| openvpn | openvpn | * | |
| openvpn | openvpn | 1.2.0 | |
| openvpn | openvpn | 1.2.1 | |
| openvpn | openvpn | 1.3.0 | |
| openvpn | openvpn | 1.3.1 | |
| openvpn | openvpn | 1.3.2 | |
| openvpn | openvpn | 1.4.0 | |
| openvpn | openvpn | 1.4.1 | |
| openvpn | openvpn | 1.4.2 | |
| openvpn | openvpn | 1.4.3 | |
| openvpn | openvpn | 1.5.0 | |
| openvpn | openvpn | 1.6.0 | |
| openvpn | openvpn | 2.1.0 | |
| openvpn | openvpn | 2.2.0 | |
| openvpn | openvpn_access_server | 2.0.0 | |
| opensuse | opensuse | 11.4 |
{
"affected": [
{
"affectedData": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"source": "secalert@redhat.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
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"criteria": "cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*",
"matchCriteriaId": "EC35891F-BC4F-4DBB-8879-4952685D419E",
"versionEndIncluding": "2.3.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openvpn:openvpn:1.2.0:*:*:*:*:*:*:*",
"matchCriteriaId": "912E57A3-A4D0-4736-858F-51A500E886B8",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openvpn:openvpn:1.2.1:*:*:*:*:*:*:*",
"matchCriteriaId": "13960B6E-F1E8-49E5-88A0-ECCC938AC4DC",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openvpn:openvpn:1.3.0:*:*:*:*:*:*:*",
"matchCriteriaId": "862743EA-7B6E-4478-AD90-1F930E97BB2E",
"vulnerable": true
},
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"criteria": "cpe:2.3:a:openvpn:openvpn:1.3.1:*:*:*:*:*:*:*",
"matchCriteriaId": "79114721-FA19-43FF-8030-74652FCF937B",
"vulnerable": true
},
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"criteria": "cpe:2.3:a:openvpn:openvpn:1.3.2:*:*:*:*:*:*:*",
"matchCriteriaId": "1A3AF5D2-21CC-4243-A2A4-99273B7AD9D5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openvpn:openvpn:1.4.0:*:*:*:*:*:*:*",
"matchCriteriaId": "B693F0CA-7A3A-42CA-A6BE-62D840CE336C",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openvpn:openvpn:1.4.1:*:*:*:*:*:*:*",
"matchCriteriaId": "345C3123-7E73-4094-8764-8BF881B6ABE7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openvpn:openvpn:1.4.2:*:*:*:*:*:*:*",
"matchCriteriaId": "F00F2FF1-9CC2-446B-9468-1FB7D40371E7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openvpn:openvpn:1.4.3:*:*:*:*:*:*:*",
"matchCriteriaId": "AB625AC3-B428-44BB-99F4-F0FE00DA1C5D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openvpn:openvpn:1.5.0:*:*:*:*:*:*:*",
"matchCriteriaId": "C25DDCBB-798B-43BF-88FF-2EDB57BEA01F",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openvpn:openvpn:1.6.0:*:*:*:*:*:*:*",
"matchCriteriaId": "F3F6FE9B-62E0-47E3-A977-DA51249A353B",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openvpn:openvpn:2.1.0:*:*:*:*:*:*:*",
"matchCriteriaId": "88C2922E-6E95-45BF-ABF1-B1D799769DB5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openvpn:openvpn:2.2.0:*:*:*:*:*:*:*",
"matchCriteriaId": "1D915A07-3B93-4D7C-8D52-73B696392B46",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openvpn:openvpn_access_server:2.0.0:*:*:*:*:*:*:*",
"matchCriteriaId": "486CD3E2-1B1A-4A1D-98ED-0E2EEAB0A0CF",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:opensuse:opensuse:11.4:*:*:*:*:*:*:*",
"matchCriteriaId": "DE554781-1EB9-446E-911F-6C11970C47F4",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode, allows remote attackers to obtain sensitive information via a timing attack involving an HMAC comparison function that does not run in constant time and a padding oracle attack on the CBC mode cipher."
},
{
"lang": "es",
"value": "La funci\u00f3n openvpn_decrypt en el archivo crypto.c en OpenVPN versiones 2.3.0 y anteriores, cuando se ejecuta en modo UDP, permite a los atacantes remotos obtener informaci\u00f3n confidencial por medio de un ataque de sincronizaci\u00f3n que implica una funci\u00f3n de comparaci\u00f3n HMAC que no se ejecuta en tiempo constante y un ataque de tipo padding oracle en el cifrado en modo CBC."
}
],
"id": "CVE-2013-2061",
"lastModified": "2026-06-16T23:52:40.450",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "LOW",
"cvssData": {
"accessComplexity": "HIGH",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 2.6,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:H/Au:N/C:P/I:N/A:N",
"version": "2.0"
},
"exploitabilityScore": 4.9,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2013-11-18T02:55:07.530",
"references": [
{
"source": "secalert@redhat.com",
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105568.html"
},
{
"source": "secalert@redhat.com",
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105609.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Vendor Advisory"
],
"url": "http://lists.opensuse.org/opensuse-updates/2013-11/msg00012.html"
},
{
"source": "secalert@redhat.com",
"url": "http://lists.opensuse.org/opensuse-updates/2013-11/msg00016.html"
},
{
"source": "secalert@redhat.com",
"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2013:167"
},
{
"source": "secalert@redhat.com",
"url": "http://www.openwall.com/lists/oss-security/2013/05/06/6"
},
{
"source": "secalert@redhat.com",
"url": "https://bugs.gentoo.org/show_bug.cgi?id=468756"
},
{
"source": "secalert@redhat.com",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=960192"
},
{
"source": "secalert@redhat.com",
"url": "https://community.openvpn.net/openvpn/wiki/SecurityAnnouncement-f375aa67cc"
},
{
"source": "secalert@redhat.com",
"tags": [
"Exploit",
"Patch"
],
"url": "https://github.com/OpenVPN/openvpn/commit/11d21349a4e7e38a025849479b36ace7c2eec2ee"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105568.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105609.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "http://lists.opensuse.org/opensuse-updates/2013-11/msg00012.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://lists.opensuse.org/opensuse-updates/2013-11/msg00016.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2013:167"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.openwall.com/lists/oss-security/2013/05/06/6"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://bugs.gentoo.org/show_bug.cgi?id=468756"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=960192"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://community.openvpn.net/openvpn/wiki/SecurityAnnouncement-f375aa67cc"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit",
"Patch"
],
"url": "https://github.com/OpenVPN/openvpn/commit/11d21349a4e7e38a025849479b36ace7c2eec2ee"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-200"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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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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