CVE-2021-39947 (GCVE-0-2021-39947)
Vulnerability from cvelistv5 – Published: 2022-06-06 16:48 – Updated: 2024-08-04 02:20
VLAI
EPSS
VEX
Summary
In specific circumstances, trace file buffers in GitLab Runner versions up to 14.3.4, 14.4 to 14.4.2, and 14.5 to 14.5.2 would re-use the file descriptor 0 for multiple traces and mix the output of several jobs
Severity
5.3 (Medium)
CWE
- Information exposure in GitLab Runner
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://gitlab.com/gitlab-org/gitlab-runner/-/iss… | x_refsource_MISC |
| https://gitlab.com/gitlab-org/cves/-/blob/master/… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| GitLab | GitLab Runner |
Affected:
<14.3.4
Affected: >=14.4, <14.4.2 Affected: >=14.5, <14.5.2 |
guessed |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T02:20:34.198Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://gitlab.com/gitlab-org/gitlab-runner/-/issues/28732"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39947.json"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "GitLab Runner",
"vendor": "GitLab",
"versions": [
{
"status": "affected",
"version": "\u003c14.3.4"
},
{
"status": "affected",
"version": "\u003e=14.4, \u003c14.4.2"
},
{
"status": "affected",
"version": "\u003e=14.5, \u003c14.5.2"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "This vulnerability has been discovered internally by the GitLab team"
}
],
"descriptions": [
{
"lang": "en",
"value": "In specific circumstances, trace file buffers in GitLab Runner versions up to 14.3.4, 14.4 to 14.4.2, and 14.5 to 14.5.2 would re-use the file descriptor 0 for multiple traces and mix the output of several jobs"
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Information exposure in GitLab Runner",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2022-06-06T16:48:14.000Z",
"orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
"shortName": "GitLab"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://gitlab.com/gitlab-org/gitlab-runner/-/issues/28732"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39947.json"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "cve@gitlab.com",
"ID": "CVE-2021-39947",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "GitLab Runner",
"version": {
"version_data": [
{
"version_value": "\u003c14.3.4"
},
{
"version_value": "\u003e=14.4, \u003c14.4.2"
},
{
"version_value": "\u003e=14.5, \u003c14.5.2"
}
]
}
}
]
},
"vendor_name": "GitLab"
}
]
}
},
"credit": [
{
"lang": "eng",
"value": "This vulnerability has been discovered internally by the GitLab team"
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "In specific circumstances, trace file buffers in GitLab Runner versions up to 14.3.4, 14.4 to 14.4.2, and 14.5 to 14.5.2 would re-use the file descriptor 0 for multiple traces and mix the output of several jobs"
}
]
},
"impact": {
"cvss": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.2,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "Information exposure in GitLab Runner"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://gitlab.com/gitlab-org/gitlab-runner/-/issues/28732",
"refsource": "MISC",
"url": "https://gitlab.com/gitlab-org/gitlab-runner/-/issues/28732"
},
{
"name": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39947.json",
"refsource": "CONFIRM",
"url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39947.json"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
"assignerShortName": "GitLab",
"cveId": "CVE-2021-39947",
"datePublished": "2022-06-06T16:48:14.000Z",
"dateReserved": "2021-08-23T00:00:00.000Z",
"dateUpdated": "2024-08-04T02:20:34.198Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2021-39947",
"date": "2026-10-04",
"epss": "0.00836",
"percentile": "0.56253"
},
"fkie_nvd": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:gitlab:gitlab_runner:*:*:*:*:*:*:*:*",
"matchCriteriaId": "70B68D88-54F0-4461-AF14-953C347C232F",
"versionEndExcluding": "14.3.4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:gitlab:gitlab_runner:*:*:*:*:*:*:*:*",
"matchCriteriaId": "169E7CFF-F6E8-44AD-AD12-6E7A44707DB1",
"versionEndExcluding": "14.4.2",
"versionStartIncluding": "14.4.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:gitlab:gitlab_runner:*:*:*:*:*:*:*:*",
"matchCriteriaId": "CBA81196-2D76-4B2D-9C1B-79BB2761F6E3",
"versionEndExcluding": "14.5.2",
"versionStartIncluding": "14.5.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In specific circumstances, trace file buffers in GitLab Runner versions up to 14.3.4, 14.4 to 14.4.2, and 14.5 to 14.5.2 would re-use the file descriptor 0 for multiple traces and mix the output of several jobs"
},
{
"lang": "es",
"value": "En circunstancias espec\u00edficas, los b\u00faferes de archivos de rastreo en GitLab Runner versiones hasta 14.3.4, 14.4 a 14.4.2, y 14.5 a 14.5.2 reusar\u00edan el descriptor de archivo 0 para m\u00faltiples rastreos y mezclar\u00edan la salida de varios trabajos"
}
],
"id": "CVE-2021-39947",
"lastModified": "2024-11-21T06:20:38.303",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 4.3,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
"version": "2.0"
},
"exploitabilityScore": 8.6,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 1.6,
"impactScore": 3.6,
"source": "cve@gitlab.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2022-06-06T17:15:09.893",
"references": [
{
"source": "cve@gitlab.com",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39947.json"
},
{
"source": "cve@gitlab.com",
"tags": [
"Broken Link"
],
"url": "https://gitlab.com/gitlab-org/gitlab-runner/-/issues/28732"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39947.json"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Broken Link"
],
"url": "https://gitlab.com/gitlab-org/gitlab-runner/-/issues/28732"
}
],
"sourceIdentifier": "cve@gitlab.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"nvd": {
"cve": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:gitlab:gitlab_runner:*:*:*:*:*:*:*:*",
"matchCriteriaId": "70B68D88-54F0-4461-AF14-953C347C232F",
"versionEndExcluding": "14.3.4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:gitlab:gitlab_runner:*:*:*:*:*:*:*:*",
"matchCriteriaId": "169E7CFF-F6E8-44AD-AD12-6E7A44707DB1",
"versionEndExcluding": "14.4.2",
"versionStartIncluding": "14.4.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:gitlab:gitlab_runner:*:*:*:*:*:*:*:*",
"matchCriteriaId": "CBA81196-2D76-4B2D-9C1B-79BB2761F6E3",
"versionEndExcluding": "14.5.2",
"versionStartIncluding": "14.5.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In specific circumstances, trace file buffers in GitLab Runner versions up to 14.3.4, 14.4 to 14.4.2, and 14.5 to 14.5.2 would re-use the file descriptor 0 for multiple traces and mix the output of several jobs"
},
{
"lang": "es",
"value": "En circunstancias espec\u00edficas, los b\u00faferes de archivos de rastreo en GitLab Runner versiones hasta 14.3.4, 14.4 a 14.4.2, y 14.5 a 14.5.2 reusar\u00edan el descriptor de archivo 0 para m\u00faltiples rastreos y mezclar\u00edan la salida de varios trabajos"
}
],
"id": "CVE-2021-39947",
"lastModified": "2024-11-21T06:20:38.303",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 4.3,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
"version": "2.0"
},
"exploitabilityScore": 8.6,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 1.6,
"impactScore": 3.6,
"source": "cve@gitlab.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2022-06-06T17:15:09.893",
"references": [
{
"source": "cve@gitlab.com",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39947.json"
},
{
"source": "cve@gitlab.com",
"tags": [
"Broken Link"
],
"url": "https://gitlab.com/gitlab-org/gitlab-runner/-/issues/28732"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39947.json"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Broken Link"
],
"url": "https://gitlab.com/gitlab-org/gitlab-runner/-/issues/28732"
}
],
"sourceIdentifier": "cve@gitlab.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-03-27T13:36:30+00:00",
"cve": "CVE-2021-39947",
"id": "CVE-2021-39947",
"initial_release_date": "2021-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "CVE-2021-39947",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-39947.json",
"version": "3"
}
}
}
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…
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.
Loading…
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.
Loading…