CVE-2015-5600 (GCVE-0-2015-5600)
Vulnerability from cvelistv5 – Published: 2015-08-03 00:00 – Updated: 2026-05-27 16:31
VLAI
EPSS
VEX
Summary
The kbdint_next_device function in auth2-chall.c in sshd in OpenSSH through 6.9 does not properly restrict the processing of keyboard-interactive devices within a single connection, which makes it easier for remote attackers to conduct brute-force attacks or cause a denial of service (CPU consumption) via a long and duplicative list in the ssh -oKbdInteractiveDevices option, as demonstrated by a modified client that provides a different password for each pam element on this list.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-27 16:31 UTC
CWE
- n/a
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
33 references
Date Public
2015-07-17 00:00
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},
{
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},
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},
{
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"url": "http://www.securitytracker.com/id/1032988"
},
{
"name": "20150717 OpenSSH keyboard-interactive authentication brute force vulnerability (MaxAuthTries bypass)",
"tags": [
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},
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},
{
"tags": [
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"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
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"attackVector": "NETWORK",
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"baseScore": 8.1,
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
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}
},
{
"other": {
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"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-27T16:31:47.512279Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
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"descriptions": [
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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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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"assignerShortName": "mitre",
"cveId": "CVE-2015-5600",
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"dateReserved": "2015-07-20T00:00:00.000Z",
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"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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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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