CVE-2020-8443

In OSSEC-HIDS 2.7 through 3.5.0, the server component responsible for log analysis (ossec-analysisd) is vulnerable to an off-by-one heap-based buffer overflow during the cleaning of crafted syslog msgs (received from authenticated remote agents and delivered to the analysisd processing queue by ossec-remoted).

CVSS v3 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

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

7.5^/10

CVSS v2.0 : HIGH

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

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/ossec/ossec-hids/issues/1816	Exploit Third Party Advisory
https://github.com/ossec/ossec-hids/issues/1821	Third Party Advisory
https://security.gentoo.org/glsa/202007-33	Third Party Advisory
https://www.ossec.net/	Vendor Advisory
https://github.com/ossec/ossec-hids/issues/1816	Exploit Third Party Advisory
https://github.com/ossec/ossec-hids/issues/1821	Third Party Advisory
https://security.gentoo.org/glsa/202007-33	Third Party Advisory
https://www.ossec.net/	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:ossec:ossec:*:*:*:*:*:*:*:*

History

21 Nov 2024, 05:38

Type	Values Removed	Values Added
References	~~() https://github.com/ossec/ossec-hids/issues/1816 - Exploit, Third Party Advisory~~	() https://github.com/ossec/ossec-hids/issues/1816 - Exploit, Third Party Advisory
References	~~() https://github.com/ossec/ossec-hids/issues/1821 - Third Party Advisory~~	() https://github.com/ossec/ossec-hids/issues/1821 - Third Party Advisory
References	~~() https://security.gentoo.org/glsa/202007-33 - Third Party Advisory~~	() https://security.gentoo.org/glsa/202007-33 - Third Party Advisory
References	~~() https://www.ossec.net/ - Vendor Advisory~~	() https://www.ossec.net/ - Vendor Advisory

Information

Published : 2020-01-30 01:15

Updated : 2024-11-21 05:38

NVD link : CVE-2020-8443

Mitre link : CVE-2020-8443

CVE.ORG link : CVE-2020-8443

JSON object : View

Products Affected

ossec

ossec

CWE

CWE-193

Off-by-one Error

CWE-787

Out-of-bounds Write

{"id": "CVE-2020-8443", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"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": "2020-01-30T01:15:10.777", "references": [{"url": "https://github.com/ossec/ossec-hids/issues/1816", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/ossec/ossec-hids/issues/1821", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://security.gentoo.org/glsa/202007-33", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://www.ossec.net/", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/ossec/ossec-hids/issues/1816", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/ossec/ossec-hids/issues/1821", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://security.gentoo.org/glsa/202007-33", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.ossec.net/", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-193"}, {"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "In OSSEC-HIDS 2.7 through 3.5.0, the server component responsible for log analysis (ossec-analysisd) is vulnerable to an off-by-one heap-based buffer overflow during the cleaning of crafted syslog msgs (received from authenticated remote agents and delivered to the analysisd processing queue by ossec-remoted)."}, {"lang": "es", "value": "En OSSEC-HIDS versiones 2.7 hasta 3.5.0, el componente del servidor responsable del an\u00e1lisis de registro (ossec-analysisd) es vulnerable a un desbordamiento de b\u00fafer en la regi\u00f3n heap de la memoria por un paso durante la limpieza de los mensajes syslog dise\u00f1ados (recibidos desde agentes remotos autenticados y entregados a la cola de procesamiento de analysisd por ossec-remoted)."}], "lastModified": "2024-11-21T05:38:51.923", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:ossec:ossec:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B349E3E6-F70E-41A0-843D-202A82473ABD", "versionEndIncluding": "3.5.0", "versionStartIncluding": "2.7"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}