{"id":"CVE-2020-7451","state":"PUBLISHED","title":"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 ","description":"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.","publishedAt":"2020-04-28T19:11:42.000Z","updatedAt":"2024-08-04T09:25:48.993Z","severity":null,"assigner":"freebsd","products":["n/a FreeBSD"],"affected":[{"vendor":"n/a","product":"FreeBSD","versions":[{"version":"12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, 11.3-RELEASE before 11.3-RELEASE-p7","status":"affected"}]}],"references":["https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc"],"weaknesses":[],"ingestedAt":"2026-10-29T19:47:41.446Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2020/7xxx/CVE-2020-7451.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2020-7451","state":"PUBLISHED","datePublished":"2020-04-28T19:11:42.000Z","dateUpdated":"2024-08-04T09:25:48.993Z","assignerShortName":"freebsd","assignerOrgId":"63664ac6-956c-4cba-a5d0-f46076e16109","dateReserved":"2020-01-21T00:00:00.000Z"},"containers":{"cna":{"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."}],"affected":[{"vendor":"n/a","product":"FreeBSD","versions":[{"version":"12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, 11.3-RELEASE before 11.3-RELEASE-p7","status":"affected"}]}],"references":[{"url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc","tags":["x_refsource_CONFIRM"]}],"problemTypes":[{"descriptions":[{"description":"Improper initialization","lang":"en","type":"text"}]}],"providerMetadata":{"shortName":"freebsd","dateUpdated":"2020-04-28T19:11:42.000Z","orgId":"63664ac6-956c-4cba-a5d0-f46076e16109"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"secteam@freebsd.org","ID":"CVE-2020-7451","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"FreeBSD","version":{"version_data":[{"version_value":"12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, 11.3-RELEASE before 11.3-RELEASE-p7"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","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."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Improper initialization"}]}]},"references":{"reference_data":[{"name":"https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc","refsource":"CONFIRM","url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc","tags":["x_refsource_CONFIRM","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T09:25:48.993Z"}}]}}}