GSD-2021-39156
Vulnerability from gsd - Updated: 2023-12-13 01:23Details
Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio’s URI path based authorization policies. Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. As a work around a Lua filter may be written to normalize the path.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-39156",
"description": "Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio\u2019s URI path based authorization policies. Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. As a work around a Lua filter may be written to normalize the path.",
"id": "GSD-2021-39156",
"references": [
"https://access.redhat.com/errata/RHSA-2021:3273",
"https://access.redhat.com/errata/RHSA-2021:3272",
"https://security.archlinux.org/CVE-2021-39156"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
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],
"details": "Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio\u2019s URI path based authorization policies. Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. As a work around a Lua filter may be written to normalize the path.",
"id": "GSD-2021-39156",
"modified": "2023-12-13T01:23:16.024710Z",
"schema_version": "1.4.0"
}
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"STATE": "PUBLIC",
"TITLE": "Fragments in Path May Lead to Authorization Policy Bypass"
},
"affects": {
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}
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"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.1,
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"url": "https://istio.io/latest/news/security/istio-security-2021-008"
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"source": {
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"discovery": "UNKNOWN"
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"affected_range": "\u003c1.9.8||\u003e=1.10.0 \u003c1.10.4||=1.11.0",
"affected_versions": "All versions before 1.9.8, all versions starting from 1.10.0 before 1.10.4, version 1.11.0",
"cvss_v2": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
"cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"cwe_ids": [
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],
"date": "2021-10-21",
"description": "Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio\u00e2\u20ac\u2122s URI path based authorization policies. Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. As a work around a Lua filter may be written to normalize the path.",
"fixed_versions": [
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"identifier": "CVE-2021-39156",
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"not_impacted": "All versions starting from 1.9.8 before 1.10.0, all versions starting from 1.10.4 before 1.11.0, all versions after 1.11.0",
"package_slug": "go/Istio.io/istio",
"pubdate": "2021-08-30",
"solution": "Upgrade to versions 1.9.8, 1.10.4, 1.11.1 or above.",
"title": "Incorrect Authorization",
"urls": [
"https://github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4r",
"https://nvd.nist.gov/vuln/detail/CVE-2021-39156",
"https://istio.io/latest/news/security/istio-security-2021-008",
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"uuid": "eb7fa8c3-75a6-466c-8eb4-dfcacfe263b1"
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"cvss_v2": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
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"cwe_ids": [
"CWE-1035",
"CWE-706",
"CWE-937"
],
"date": "2022-08-12",
"description": "Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio contains a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio\u0027s URI path based authorization policies. As a work around a Lua filter may be written to normalize the path.",
"fixed_versions": [
"1.9.8",
"1.10.3",
"1.11.1"
],
"identifier": "CVE-2021-39156",
"identifiers": [
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"not_impacted": "",
"package_slug": "go/github.com/istio/istio",
"pubdate": "2021-08-24",
"solution": "Upgrade to versions 1.9.8, 1.10.3, 1.11.1 or above.",
"title": "Incorrect Authorization",
"urls": [
"https://nvd.nist.gov/vuln/detail/CVE-2021-39156",
"https://istio.io/latest/news/security/istio-security-2021-008"
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"uuid": "dc44012e-9adb-4924-b4e2-c4cd889e98d2"
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"authentication": "NONE",
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"integrityImpact": "NONE",
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},
"lastModifiedDate": "2022-08-12T18:01Z",
"publishedDate": "2021-08-24T23:15Z"
}
}
}
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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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