CVE-2018-20685 (GCVE-0-2018-20685)
Vulnerability from cvelistv5 – Published: 2019-01-10 00:00 – Updated: 2025-12-17 21:53
VLAI
EPSS
VEX
Summary
In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-17 21:53 UTC
CWE
- n/a
- CWE-863 - Incorrect Authorization
Assigner
References
14 references
Date Public
2019-01-10 00:00
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"timestamp": "2025-12-17T21:53:24.729008Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-863",
"description": "CWE-863 Incorrect Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-12-17T21:53:01.752Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"datePublic": "2019-01-10T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "n/a",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2022-12-13T00:00:00.000Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"name": "DSA-4387",
"tags": [
"vendor-advisory"
],
"url": "https://www.debian.org/security/2019/dsa-4387"
},
{
"name": "USN-3885-1",
"tags": [
"vendor-advisory"
],
"url": "https://usn.ubuntu.com/3885-1/"
},
{
"url": "https://github.com/openssh/openssh-portable/commit/6010c0303a422a9c5fa8860c061bf7105eb7f8b2"
},
{
"url": "https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/scp.c.diff?r1=1.197\u0026r2=1.198\u0026f=h"
},
{
"url": "https://security.netapp.com/advisory/ntap-20190215-0001/"
},
{
"name": "106531",
"tags": [
"vdb-entry"
],
"url": "http://www.securityfocus.com/bid/106531"
},
{
"url": "https://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt"
},
{
"name": "GLSA-201903-16",
"tags": [
"vendor-advisory"
],
"url": "https://security.gentoo.org/glsa/201903-16"
},
{
"name": "[debian-lts-announce] 20190325 [SECURITY] [DLA 1728-1] openssh security update",
"tags": [
"mailing-list"
],
"url": "https://lists.debian.org/debian-lts-announce/2019/03/msg00030.html"
},
{
"url": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html"
},
{
"url": "https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html"
},
{
"name": "RHSA-2019:3702",
"tags": [
"vendor-advisory"
],
"url": "https://access.redhat.com/errata/RHSA-2019:3702"
},
{
"name": "GLSA-202007-53",
"tags": [
"vendor-advisory"
],
"url": "https://security.gentoo.org/glsa/202007-53"
},
{
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2018-20685",
"datePublished": "2019-01-10T00:00:00.000Z",
"dateReserved": "2019-01-10T00:00:00.000Z",
"dateUpdated": "2025-12-17T21:53:56.287Z",
"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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