CVE-2021-42757 (GCVE-0-2021-42757)
Vulnerability from cvelistv5 – Published: 2021-12-08 11:01 – Updated: 2025-10-16 09:46
VLAI?
Summary
A buffer overflow [CWE-121] in the TFTP client library of FortiOS before 6.4.7 and FortiOS 7.0.0 through 7.0.2, may allow an authenticated local attacker to achieve arbitrary code execution via specially crafted command line arguments.
Severity ?
CWE
- CWE-120 - Execute unauthorized code or commands
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fortinet | FortiOS |
Affected:
7.0.0 , ≤ 7.0.2
(semver)
Affected: 6.4.0 , ≤ 6.4.7 (semver) Affected: 6.2.0 , ≤ 6.2.9 (semver) Affected: 6.0.0 , ≤ 6.0.13 (semver) Affected: 5.6.0 , ≤ 5.6.14 (semver) Affected: 5.4.0 , ≤ 5.4.13 (semver) Affected: 5.2.0 , ≤ 5.2.15 (semver) Affected: 5.0.0 , ≤ 5.0.14 (semver) cpe:2.3:o:fortinet:fortios:7.0.2:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:7.0.1:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:7.0.0:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.4.7:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.4.6:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.4.5:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.4.4:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.4.3:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.4.2:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.4.1:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.4.0:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.2.9:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.2.8:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.2.7:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.2.6:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.2.5:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.2.4:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.2.3:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.2.2:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.2.1:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.2.0:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.0.13:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.0.12:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.0.11:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.0.10:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.0.9:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.0.8:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.0.7:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.0.6:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.0.5:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.0.4:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.0.3:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.0.2:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.0.1:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:6.0.0:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.6.14:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.6.13:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.6.12:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.6.11:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.6.10:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.6.9:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.6.8:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.6.7:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.6.6:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.6.5:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.6.4:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.6.3:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.6.2:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.6.1:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.6.0:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.4.13:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.4.12:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.4.11:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.4.10:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.4.9:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.4.8:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.4.7:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.4.6:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.4.5:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.4.4:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.4.3:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.4.2:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.4.1:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.4.0:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.2.15:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.2.14:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.2.13:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.2.12:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.2.11:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.2.10:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.2.9:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.2.8:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.2.7:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.2.6:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.2.5:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.2.4:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.2.3:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.2.2:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.2.1:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.2.0:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.0.14:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.0.13:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.0.12:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.0.11:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.0.10:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.0.9:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.0.8:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.0.7:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.0.6:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.0.5:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.0.4:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.0.3:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.0.2:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.0.1:*:*:*:*:*:*:* cpe:2.3:o:fortinet:fortios:5.0.0:*:*:*:*:*:*:* |
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{
"containers": {
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"providerMetadata": {
"dateUpdated": "2024-08-04T03:38:50.116Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://fortiguard.com/advisory/FG-IR-21-173"
}
],
"title": "CVE Program Container"
}
],
"cna": {
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"value": "A buffer overflow [CWE-121] in the TFTP client library of FortiOS before 6.4.7 and FortiOS 7.0.0 through 7.0.2, may allow an authenticated local attacker to achieve arbitrary code execution via specially crafted command line arguments."
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"attackVector": "LOCAL",
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"baseScore": 6.3,
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C",
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"orgId": "6abe59d8-c742-4dff-8ce8-9b0ca1073da8",
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"name": "https://fortiguard.com/advisory/FG-IR-21-173",
"url": "https://fortiguard.com/advisory/FG-IR-21-173"
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],
"solutions": [
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"lang": "en",
"value": "Upgrade to FortiOS version 7.0.3 or above\nUpgrade to FortiOS version 6.4.8 or above\nUpgrade to FortiOS version 6.2.10 or above\nUpgrade to FortiOS version 6.0.14 or above\nUpgrade to FortiDDoS-F version 6.4.2 or above\nUpgrade to FortiDDoS-F version 6.3.1 or above\nUpgrade to FortiDDoS-F version 6.2.3 or above\nUpgrade to FortiDDoS-F version 6.1.5 or above\nUpgrade to FortiOS-6K7K version 6.4.8 or above\nUpgrade to FortiOS-6K7K version 6.2.9 or above\nUpgrade to FortiVoice version 6.4.5 or above\nUpgrade to FortiVoice version 6.0.11 or above\nUpgrade to FortiProxy version 7.0.2 or above\nUpgrade to FortiProxy version 2.0.8 or above\nUpgrade to FortiRecorder version 7.0.0 or above\nUpgrade to FortiRecorder version 6.4.3 or above\nUpgrade to FortiRecorder version 6.0.11 or above\nUpgrade to upcoming FortiRecorder version 2.7.8 or above\nUpgrade to FortiPortal version 6.0.11 or above\nUpgrade to FortiMail version 7.2.0 or above\nUpgrade to FortiMail version 7.0.3 or above\nUpgrade to FortiMail version 6.4.7 or above\nUpgrade to FortiAnalyzer version 7.0.3 or above\nUpgrade to FortiAnalyzer version 6.4.8 or above\nUpgrade to FortiNDR version 7.0.0 or above\nUpgrade to FortiDDoS version 5.6.0 or above\nUpgrade to FortiDDoS version 5.5.2 or above\nUpgrade to FortiSwitch version 7.2.0 or above\nUpgrade to FortiSwitch version 7.0.4 or above\nUpgrade to FortiSwitch version 6.4.10 or above\nUpgrade to FortiADC version 7.0.1 or above\nUpgrade to FortiADC version 6.2.3 or above\nUpgrade to FortiADC version 6.1.6 or above\nUpgrade to FortiWeb version 7.0.0 or above\nUpgrade to FortiWeb version 6.4.2 or above\nUpgrade to FortiWeb version 6.3.17 or above\nUpgrade to FortiManager version 7.0.3 or above\nUpgrade to FortiManager version 6.4.8 or above"
}
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"cveId": "CVE-2021-42757",
"datePublished": "2021-12-08T11:01:11",
"dateReserved": "2021-10-20T00:00:00",
"dateUpdated": "2025-10-16T09:46:26.239Z",
"state": "PUBLISHED"
},
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\"1CB7DEA7-E461-43B0-98EB-CE436DE87D98\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:fortinet:fortiswitch:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.0.0\", \"versionEndIncluding\": \"6.4.9\", \"matchCriteriaId\": \"C6E5A33E-F744-4CC0-ABA0-D1734845AFBB\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:fortinet:fortiswitch:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"7.0.0\", \"versionEndIncluding\": \"7.0.3\", \"matchCriteriaId\": \"BB3C99AC-DCA1-44A0-9671-F424109A6038\"}]}]}]",
"descriptions": "[{\"lang\": \"en\", \"value\": \"A buffer overflow [CWE-121] in the TFTP client library of FortiOS before 6.4.7 and FortiOS 7.0.0 through 7.0.2, may allow an authenticated local attacker to achieve arbitrary code execution via specially crafted command line arguments.\"}, {\"lang\": \"es\", \"value\": \"Un desbordamiento de b\\u00fafer [CWE-121] en la biblioteca del cliente TFTP de FortiOS versiones anteriores a 6.4.7 y FortiOS versiones 7.0.0 hasta 7.0.2, puede permitir a un atacante local autenticado lograr una ejecuci\\u00f3n de c\\u00f3digo arbitrario por medio de argumentos de l\\u00ednea de comandos especialmente dise\\u00f1ados\"}]",
"id": "CVE-2021-42757",
"lastModified": "2024-11-21T06:28:06.653",
"metrics": "{\"cvssMetricV31\": [{\"source\": \"psirt@fortinet.com\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H\", \"baseScore\": 6.7, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"HIGH\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 0.8, \"impactScore\": 5.9}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H\", \"baseScore\": 6.7, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"HIGH\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 0.8, \"impactScore\": 5.9}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:L/AC:L/Au:N/C:P/I:P/A:P\", \"baseScore\": 4.6, \"accessVector\": \"LOCAL\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"PARTIAL\", \"integrityImpact\": \"PARTIAL\", \"availabilityImpact\": \"PARTIAL\"}, \"baseSeverity\": \"MEDIUM\", \"exploitabilityScore\": 3.9, \"impactScore\": 6.4, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
"published": "2021-12-08T11:15:11.840",
"references": "[{\"url\": \"https://fortiguard.com/advisory/FG-IR-21-173\", \"source\": \"psirt@fortinet.com\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://fortiguard.com/advisory/FG-IR-21-173\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}]",
"sourceIdentifier": "psirt@fortinet.com",
"vulnStatus": "Modified",
"weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-787\"}]}]"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2021-42757\",\"sourceIdentifier\":\"psirt@fortinet.com\",\"published\":\"2021-12-08T11:15:11.840\",\"lastModified\":\"2025-10-16T10:15:36.230\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A buffer overflow [CWE-121] in the TFTP client library of FortiOS before 6.4.7 and FortiOS 7.0.0 through 7.0.2, may allow an authenticated local attacker to achieve arbitrary code execution via specially crafted command line arguments.\"},{\"lang\":\"es\",\"value\":\"Un desbordamiento de b\u00fafer [CWE-121] en la biblioteca del cliente TFTP de FortiOS versiones anteriores a 6.4.7 y FortiOS versiones 7.0.0 hasta 7.0.2, puede permitir a un atacante local autenticado lograr una ejecuci\u00f3n de c\u00f3digo arbitrario por medio de argumentos de l\u00ednea de comandos especialmente 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Advisory\"]},{\"url\":\"https://fortiguard.com/advisory/FG-IR-21-173\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
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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