CVE-2019-18840

In wolfSSL 4.1.0 through 4.2.0c, there are missing sanity checks of memory accesses in parsing ASN.1 certificate data while handshaking. Specifically, there is a one-byte heap-based buffer overflow inside the DecodedCert structure in GetName in wolfcrypt/src/asn.c because the domain name location index is mishandled. Because a pointer is overwritten, there is an invalid free.

CVSS v3 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://github.com/wolfSSL/wolfssl/issues/2555	Exploit Third Party Advisory
https://github.com/wolfSSL/wolfssl/issues/2555	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*

History

21 Nov 2024, 04:33

Type	Values Removed	Values Added
References	~~() https://github.com/wolfSSL/wolfssl/issues/2555 - Exploit, Third Party Advisory~~	() https://github.com/wolfSSL/wolfssl/issues/2555 - Exploit, Third Party Advisory

Information

Published : 2019-11-09 13:15

Updated : 2024-11-21 04:33

NVD link : CVE-2019-18840

Mitre link : CVE-2019-18840

CVE.ORG link : CVE-2019-18840

JSON object : View

Products Affected

wolfssl

wolfssl

CWE

CWE-787

Out-of-bounds Write

{"id": "CVE-2019-18840", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV30": [{"type": "Secondary", "source": "cve@mitre.org", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2019-11-09T13:15:10.227", "references": [{"url": "https://github.com/wolfSSL/wolfssl/issues/2555", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/wolfSSL/wolfssl/issues/2555", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "In wolfSSL 4.1.0 through 4.2.0c, there are missing sanity checks of memory accesses in parsing ASN.1 certificate data while handshaking. Specifically, there is a one-byte heap-based buffer overflow inside the DecodedCert structure in GetName in wolfcrypt/src/asn.c because the domain name location index is mishandled. Because a pointer is overwritten, there is an invalid free."}, {"lang": "es", "value": "En wolfSSL versiones 4.1.0 hasta 4.2.0c, faltan comprobaciones de saneamiento de los accesos a la memoria en el an\u00e1lisis de los datos del certificado ASN.1 durante el protocolo de enlace. Espec\u00edficamente, se presenta un desbordamiento de b\u00fafer en la regi\u00f3n heap de la memoria por un byte dentro de la estructura de DecodedCert en GetName en el archivo wolfcrypt/src/asn.c porque el \u00edndice de ubicaci\u00f3n del nombre de dominio es manejado inapropiadamente. Debido a que un puntero es sobrescrito, se presenta una liberaci\u00f3n no v\u00e1lida."}], "lastModified": "2024-11-21T04:33:41.387", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B7B7AC0D-F131-43AB-93A0-598DD96B519D", "versionEndIncluding": "4.2.0c", "versionStartIncluding": "4.1.0"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}