Vulnerability Details : 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.
Products affected by CVE-2020-7451
- 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:12.1:-:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.1:p1:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.1:p2:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:11.3:p6:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-7451
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 35 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-7451
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:N |
10.0
|
2.9
|
NIST | |
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
3.9
|
1.4
|
NIST |
CWE ids for CVE-2020-7451
-
The product uses or accesses a resource that has not been initialized.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-7451
-
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc
Patch;Vendor Advisory
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