CVE-2020-7451

In FreeBSD 12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, and 11.3-RELEASE before 11.3-RELEASE-p7, a TCP SYN-ACK or challenge TCP-ACK segment over IPv6 that is transmitted or retransmitted does not properly initialize the Traffic Class field disclosing one byte of kernel memory over the network.

CVSS v3 5.3 MEDIUM
CVSS v2.0 5.0 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc	Patch Vendor Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:freebsd:freebsd:11.3:-::::::
	cpe:2.3:o:freebsd:freebsd:11.3:p1::::::
	cpe:2.3:o:freebsd:freebsd:11.3:p2::::::
	cpe:2.3:o:freebsd:freebsd:11.3:p3::::::
	cpe:2.3:o:freebsd:freebsd:11.3:p4::::::
	cpe:2.3:o:freebsd:freebsd:11.3:p5::::::
	cpe:2.3:o:freebsd:freebsd:11.3:p6::::::
	cpe:2.3:o:freebsd:freebsd:12.1:-::::::
	cpe:2.3:o:freebsd:freebsd:12.1:p1::::::
	cpe:2.3:o:freebsd:freebsd:12.1:p2::::::

History

21 Nov 2024, 05:37

Type	Values Removed	Values Added
References	~~() https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc - Patch, Vendor Advisory~~	() https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc - Patch, Vendor Advisory

Information

Published : 2020-04-28 20:15

Updated : 2024-11-21 05:37

NVD link : CVE-2020-7451

Mitre link : CVE-2020-7451

CVE.ORG link : CVE-2020-7451

JSON object : View

Products Affected

freebsd

freebsd

CWE

CWE-908

Use of Uninitialized Resource

{"id": "CVE-2020-7451", "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:P/I:N/A:N", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "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": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "published": "2020-04-28T20:15:12.797", "references": [{"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc", "tags": ["Patch", "Vendor Advisory"], "source": "secteam@freebsd.org"}, {"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc", "tags": ["Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-908"}]}], "descriptions": [{"lang": "en", "value": "In FreeBSD 12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, and 11.3-RELEASE before 11.3-RELEASE-p7, a TCP SYN-ACK or challenge TCP-ACK segment over IPv6 that is transmitted or retransmitted does not properly initialize the Traffic Class field disclosing one byte of kernel memory over the network."}, {"lang": "es", "value": "En FreeBSD versiones 12.1-2.1-STABLE anteriores a r358739, versiones 12.1-RELEASE anteriores a 12.1-RELEASE-p3, versiones 11.3-STABLE anteriores a r358740, y versiones 11.3-RELEASE anteriores a 11.3-RELEASE-p7, un segmento de TCP SYN-ACK o de desaf\u00edo TCP-ACK sobre IPv6 que es transmitido o retransmitido no inicializa apropiadamente el campo Traffic Class que revela un byte de memoria del kernel por medio de la red."}], "lastModified": "2024-11-21T05:37:10.280", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:freebsd:freebsd:11.3:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F35957CE-AF9F-40CA-BDD1-FA6A0E73783F"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EA929713-B797-494A-853D-C121D9D69519"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3C3D8EDC-91D3-45B2-AC1D-EF4346D4A714"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EA5006FF-06A5-4D95-BF5B-29F26248D11F"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A705031B-FD63-4076-B92E-E826E11D7111"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "11C1EFB1-68E5-45F4-A7E1-744574F290D1"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:11.3:p6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "25F649A7-9265-4552-8934-BCE083363982"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:12.1:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BD730B6A-F123-4685-ACB3-4F20AAAB77F3"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:12.1:p1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "508150E3-2C0C-4EEB-BFC9-BB5CEB404C06"}, {"criteria": "cpe:2.3:o:freebsd:freebsd:12.1:p2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B5D692EF-A5D7-430E-91BA-4CD137343B66"}], "operator": "OR"}]}], "sourceIdentifier": "secteam@freebsd.org"}