CVE-2016-2181 (GCVE-0-2016-2181)
Vulnerability from cvelistv5 – Published: 2016-09-16 00:00 – Updated: 2024-08-05 23:17
VLAI
EPSS
VEX
Summary
The Anti-Replay feature in the DTLS implementation in OpenSSL before 1.1.0 mishandles early use of a new epoch number in conjunction with a large sequence number, which allows remote attackers to cause a denial of service (false-positive packet drops) via spoofed DTLS records, related to rec_layer_d1.c and ssl3_record.c.
Severity
7.5 (High)
CWE
- n/a
Assigner
References
41 references
Date Public
2016-08-19 00:00
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"value": "The Anti-Replay feature in the DTLS implementation in OpenSSL before 1.1.0 mishandles early use of a new epoch number in conjunction with a large sequence number, which allows remote attackers to cause a denial of service (false-positive packet drops) via spoofed DTLS records, related to rec_layer_d1.c and ssl3_record.c."
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The Anti-Replay feature in the DTLS implementation in OpenSSL before 1.1.0 mishandles early use of a new epoch number in conjunction with a large sequence number, which allows remote attackers to cause a denial of service (false-positive packet drops) via spoofed DTLS records, related to rec_layer_d1.c and ssl3_record.c."
},
{
"lang": "es",
"value": "La funcionalidad Anti-Replay en la implementaci\u00f3n DTLS en OpenSSL en versiones anteriores a 1.1.0 no maneja adecuadamente el uso temprano de un n\u00famero de \u00e9poca nuevo en conjunci\u00f3n con un n\u00famero de secuencia larga, lo que permite a atacantes remotos provocar una denegaci\u00f3n de servicio (gotas de paquetes falsos positivos) a trav\u00e9s de registros DTLS suplantados, relacionado con rec_layer_d1.c y ssl3_record.c."
}
],
"id": "CVE-2016-2181",
"lastModified": "2026-05-06T22:30:45.220",
"metrics": {
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{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
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"accessVector": "NETWORK",
"authentication": "NONE",
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"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,
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"obtainAllPrivilege": false,
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"source": "nvd@nist.gov",
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}
],
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{
"cvssData": {
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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},
"published": "2016-09-16T05:59:01.347",
"references": [
{
"source": "secalert@redhat.com",
"tags": [
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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},
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{
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},
{
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},
{
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},
{
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],
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},
{
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"url": "http://www.securitytracker.com/id/1036690"
},
{
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},
{
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],
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},
{
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},
{
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},
{
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"url": "https://bto.bluecoat.com/security-advisory/sa132"
},
{
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"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"
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{
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{
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"url": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10215"
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{
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{
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"url": "http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00032.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://rhn.redhat.com/errata/RHSA-2016-1940.html"
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{
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{
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{
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],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-189"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-04T21:58:04+00:00",
"cve": "CVE-2016-2181",
"id": "CVE-2016-2181",
"initial_release_date": "2016-07-05T00:00:00+00:00",
"product_status:fixed": "151",
"product_status:known_affected": "7",
"product_status:known_not_affected": "4",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "openssl: DTLS replay protection bypass allows DoS against DTLS connection",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2016/cve-2016-2181.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-16T23:53:19Z",
"cve": "CVE-2016-2181",
"id": "CVE-2016-2181",
"initial_release_date": "2023-02-15T05:06:22Z",
"product_status:known_affected": "325",
"product_status:known_not_affected": "332",
"product_status:recommended": "1050",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2016-2181",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2016-2181.json",
"version": "45"
}
}
}
Loading…
Loading…
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.
Loading…
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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