CVE-2011-1945 (GCVE-0-2011-1945)
Vulnerability from cvelistv5 – Published: 2011-05-31 20:00 – Updated: 2024-08-06 22:46
VLAI
EPSS
VEX
Summary
The elliptic curve cryptography (ECC) subsystem in OpenSSL 1.0.0d and earlier, when the Elliptic Curve Digital Signature Algorithm (ECDSA) is used for the ECDHE_ECDSA cipher suite, does not properly implement curves over binary fields, which makes it easier for context-dependent attackers to determine private keys via a timing attack and a lattice calculation.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
11 references
| URL | Tags |
|---|---|
| http://www.mandriva.com/security/advisories?name=… | vendor-advisoryx_refsource_MANDRIVA |
| http://www.kb.cert.org/vuls/id/MAPG-8FENZ3 | x_refsource_CONFIRM |
| http://www.mandriva.com/security/advisories?name=… | vendor-advisoryx_refsource_MANDRIVA |
| http://www.debian.org/security/2011/dsa-2309 | vendor-advisoryx_refsource_DEBIAN |
| http://support.apple.com/kb/HT5784 | x_refsource_CONFIRM |
| http://lists.apple.com/archives/security-announce… | vendor-advisoryx_refsource_APPLE |
| https://hermes.opensuse.org/messages/8760466 | vendor-advisoryx_refsource_SUSE |
| http://www.kb.cert.org/vuls/id/536044 | third-party-advisoryx_refsource_CERT-VN |
| https://hermes.opensuse.org/messages/8764170 | vendor-advisoryx_refsource_SUSE |
| http://secunia.com/advisories/44935 | third-party-advisoryx_refsource_SECUNIA |
| http://eprint.iacr.org/2011/232.pdf | x_refsource_MISC |
Date Public
2011-05-17 00:00
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{
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},
{
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"vulnerable": true
},
{
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"matchCriteriaId": "3C9BF2DD-85EF-49CF-8D83-0DB46449E333",
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{
"criteria": "cpe:2.3:a:openssl:openssl:0.9.8n:*:*:*:*:*:*:*",
"matchCriteriaId": "86C46AB8-52E5-4385-9C5C-F63FF9DB82AA",
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},
{
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"matchCriteriaId": "564AA4E7-223E-48D8-B3E0-A461969CF530",
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{
"criteria": "cpe:2.3:a:openssl:openssl:0.9.8p:*:*:*:*:*:*:*",
"matchCriteriaId": "A82CFB41-BEA5-4B5F-BCAA-9BAED22EEAF0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openssl:openssl:1.0.0:*:*:*:*:*:*:*",
"matchCriteriaId": "2FBD8C92-6138-4274-ACBA-D7D42DAEC5AC",
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},
{
"criteria": "cpe:2.3:a:openssl:openssl:1.0.0:beta1:*:*:*:*:*:*",
"matchCriteriaId": "3A2075BD-6102-4B0F-839A-836E9585F43B",
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},
{
"criteria": "cpe:2.3:a:openssl:openssl:1.0.0:beta2:*:*:*:*:*:*",
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{
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"matchCriteriaId": "F02E634E-1E3D-4E44-BADA-76F92483A732",
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{
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},
{
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The elliptic curve cryptography (ECC) subsystem in OpenSSL 1.0.0d and earlier, when the Elliptic Curve Digital Signature Algorithm (ECDSA) is used for the ECDHE_ECDSA cipher suite, does not properly implement curves over binary fields, which makes it easier for context-dependent attackers to determine private keys via a timing attack and a lattice calculation."
},
{
"lang": "es",
"value": "El subsistema de criptograf\u00eda de curva el\u00edptica (ECC) de OpenSSL v1.0.0d y versiones anteriores, cuando el algoritmo de firma digital de la curva el\u00edmptica(ECDSA) se utiliza para el conjunto de cifrado ECDHE_ECDSA, no aplica adecuadamente las curvas sobre campos binarios, lo que hace que sea m\u00e1s f\u00e1cil para el atacantes dependientes del contexto determinar las claves privadas a trav\u00e9s de un ataque de oportunidad y un c\u00e1lculo del entramado (lattice)."
}
],
"id": "CVE-2011-1945",
"lastModified": "2026-04-29T01:13:23.040",
"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": "2011-05-31T20:55:05.267",
"references": [
{
"source": "secalert@redhat.com",
"tags": [
"Exploit"
],
"url": "http://eprint.iacr.org/2011/232.pdf"
},
{
"source": "secalert@redhat.com",
"url": "http://lists.apple.com/archives/security-announce/2013/Jun/msg00000.html"
},
{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/44935"
},
{
"source": "secalert@redhat.com",
"url": "http://support.apple.com/kb/HT5784"
},
{
"source": "secalert@redhat.com",
"url": "http://www.debian.org/security/2011/dsa-2309"
},
{
"source": "secalert@redhat.com",
"tags": [
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],
"url": "http://www.kb.cert.org/vuls/id/536044"
},
{
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"tags": [
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],
"url": "http://www.kb.cert.org/vuls/id/MAPG-8FENZ3"
},
{
"source": "secalert@redhat.com",
"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:136"
},
{
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"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:137"
},
{
"source": "secalert@redhat.com",
"url": "https://hermes.opensuse.org/messages/8760466"
},
{
"source": "secalert@redhat.com",
"url": "https://hermes.opensuse.org/messages/8764170"
},
{
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"tags": [
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],
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},
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},
{
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},
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"tags": [
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],
"url": "http://www.kb.cert.org/vuls/id/536044"
},
{
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"tags": [
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],
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},
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},
{
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"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:137"
},
{
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"url": "https://hermes.opensuse.org/messages/8760466"
},
{
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"url": "https://hermes.opensuse.org/messages/8764170"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-310"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Important",
"current_release_date": "2026-01-28T22:28:41+00:00",
"cve": "CVE-2011-1945",
"id": "CVE-2011-1945",
"initial_release_date": "2011-05-17T00:00:00+00:00",
"product_status:known_not_affected": "11",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "openssl: ECDSA private key leak through a remote timing attack",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2011/cve-2011-1945.json",
"version": "3"
}
}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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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.