CVE-2018-6918

In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p9, 10.4-STABLE, 10.4-RELEASE-p8 and 10.3-RELEASE-p28, the length field of the ipsec option header does not count the size of the option header itself, causing an infinite loop when the length is zero. This issue can allow a remote attacker who is able to send an arbitrary packet to cause the machine to crash.

CVSS v3.0 7.5 HIGH
CVSS v2.0 7.8 HIGH

7.5^/10

CVSS v3.0 : HIGH

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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

7.8^/10

CVSS v2.0 : HIGH

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

Exploitability : 10.0 / Impact : 6.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

References

Link	Resource
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:05.ipsec.asc	Vendor Advisory
http://www.securitytracker.com/id/1040628	Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/103666	Third Party Advisory VDB Entry
https://support.apple.com/kb/HT210090
https://seclists.org/bugtraq/2019/May/77
http://seclists.org/fulldisclosure/2019/Jun/6
https://support.apple.com/kb/HT210091

Advertisement

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:freebsd:freebsd::::::::
	cpe:2.3:o:freebsd:freebsd::::::::

Information

Published : 2018-04-04 07:29

Updated : 2019-10-02 17:03

NVD link : CVE-2018-6918

Mitre link : CVE-2018-6918

JSON object : View

CWE

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

Advertisement

Products Affected

freebsd

freebsd

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-18:05.ipsec.asc", "name": "FreeBSD-SA-18:05", "tags": ["Vendor Advisory"], "refsource": "FREEBSD"}, {"url": "http://www.securitytracker.com/id/1040628", "name": "1040628", "tags": ["Third Party Advisory", "VDB Entry"], "refsource": "SECTRACK"}, {"url": "http://www.securityfocus.com/bid/103666", "name": "103666", "tags": ["Third Party Advisory", "VDB Entry"], "refsource": "BID"}, {"url": "https://support.apple.com/kb/HT210090", "name": "https://support.apple.com/kb/HT210090", "tags": [], "refsource": "CONFIRM"}, {"url": "https://seclists.org/bugtraq/2019/May/77", "name": "20190531 APPLE-SA-2019-5-30-1 AirPort Base Station Firmware Update 7.9.1", "tags": [], "refsource": "BUGTRAQ"}, {"url": "http://seclists.org/fulldisclosure/2019/Jun/6", "name": "20190611 APPLE-SA-2019-5-30-1 AirPort Base Station Firmware Update 7.9.1", "tags": [], "refsource": "FULLDISC"}, {"url": "https://support.apple.com/kb/HT210091", "name": "https://support.apple.com/kb/HT210091", "tags": [], "refsource": "CONFIRM"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p9, 10.4-STABLE, 10.4-RELEASE-p8 and 10.3-RELEASE-p28, the length field of the ipsec option header does not count the size of the option header itself, causing an infinite loop when the length is zero. This issue can allow a remote attacker who is able to send an arbitrary packet to cause the machine to crash."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-835"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2018-6918", "ASSIGNER": "secteam@freebsd.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 7.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "NONE"}, "severity": "HIGH", "impactScore": 6.9, "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"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}}, "publishedDate": "2018-04-04T14:29Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "10.4", "versionStartIncluding": "10.0"}, {"cpe23Uri": "cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "11.1", "versionStartIncluding": "11.0"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2019-10-03T00:03Z"}