CVE-2021-42756

Multiple stack-based buffer overflow vulnerabilities [CWE-121] in the proxy daemon of FortiWeb 5.x all versions, 6.0.7 and below, 6.1.2 and below, 6.2.6 and below, 6.3.16 and below, 6.4 all versions may allow an unauthenticated remote attacker to achieve arbitrary code execution via specifically crafted HTTP requests.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://fortiguard.com/psirt/FG-IR-21-186	Vendor Advisory
https://fortiguard.com/psirt/FG-IR-21-186	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:fortinet:fortiweb::::::::
	cpe:2.3:a:fortinet:fortiweb::::::::
	cpe:2.3:a:fortinet:fortiweb::::::::
	cpe:2.3:a:fortinet:fortiweb::::::::
	cpe:2.3:a:fortinet:fortiweb::::::::

History

21 Nov 2024, 06:28

Type	Values Removed	Values Added
References	~~() https://fortiguard.com/psirt/FG-IR-21-186 - Vendor Advisory~~	() https://fortiguard.com/psirt/FG-IR-21-186 - Vendor Advisory

07 Nov 2023, 03:39

Type	Values Removed	Values Added
Summary	Multiple stack-based buffer overflow vulnerabilities [CWE-121] in the proxy daemon of FortiWeb 5.x all versions, 6.0.7 and below, 6.1.2 and below, 6.2.6 and below, 6.3.16 and below, 6.4 all versions may allow an unauthenticated remote attacker to achieve arbitrary code execution via specifically crafted HTTP requests.	Multiple stack-based buffer overflow vulnerabilities [CWE-121] in the proxy daemon of FortiWeb 5.x all versions, 6.0.7 and below, 6.1.2 and below, 6.2.6 and below, 6.3.16 and below, 6.4 all versions may allow an unauthenticated remote attacker to achieve arbitrary code execution via specifically crafted HTTP requests.

Information

Published : 2023-02-16 19:15

Updated : 2024-11-21 06:28

NVD link : CVE-2021-42756

Mitre link : CVE-2021-42756

CVE.ORG link : CVE-2021-42756

JSON object : View

Products Affected

fortinet

fortiweb

CWE

CWE-121

Stack-based Buffer Overflow

CWE-787

Out-of-bounds Write

{"id": "CVE-2021-42756", "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "psirt@fortinet.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2023-02-16T19:15:11.500", "references": [{"url": "https://fortiguard.com/psirt/FG-IR-21-186", "tags": ["Vendor Advisory"], "source": "psirt@fortinet.com"}, {"url": "https://fortiguard.com/psirt/FG-IR-21-186", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "psirt@fortinet.com", "description": [{"lang": "en", "value": "CWE-121"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "Multiple stack-based buffer overflow vulnerabilities\u00a0[CWE-121] in the proxy daemon of FortiWeb 5.x\u00a0all versions, 6.0.7 and below, 6.1.2 and below, 6.2.6 and below, 6.3.16 and below, 6.4\u00a0all versions may allow an unauthenticated remote attacker to achieve arbitrary code execution via specifically crafted HTTP requests."}], "lastModified": "2024-11-21T06:28:06.483", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D7C64AF2-21C5-4763-BF18-67B2D3D01614", "versionEndExcluding": "6.0.8", "versionStartIncluding": "5.6.0"}, {"criteria": "cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9EFA8AB9-2777-471C-A1DA-635BDACE2F10", "versionEndExcluding": "6.1.3", "versionStartIncluding": "6.1.0"}, {"criteria": "cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "919112F8-1479-45F0-BE4D-91112143D2AF", "versionEndExcluding": "6.2.7", "versionStartIncluding": "6.2.0"}, {"criteria": "cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0B1B7CFD-96E5-40EA-9CBC-48D0255081BD", "versionEndExcluding": "6.3.17", "versionStartIncluding": "6.3.0"}, {"criteria": "cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F6B93ABE-8620-4253-83C0-3D2228D20118", "versionEndIncluding": "6.4.2", "versionStartIncluding": "6.4.0"}], "operator": "OR"}]}], "sourceIdentifier": "psirt@fortinet.com"}