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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
freebsdCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 75%
VendorProductVersion
freebsdfreebsd
11.3
freebsdfreebsd
11.3:p1
freebsdfreebsd
11.3:p2
freebsdfreebsd
11.3:p3
freebsdfreebsd
11.3:p4
freebsdfreebsd
11.3:p5
freebsdfreebsd
11.3:p6
freebsdfreebsd
12.1
freebsdfreebsd
12.1:p1
freebsdfreebsd
12.1:p2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc