What is CVE-2020-7451?

CVE-2020-7451 is a medium-severity vulnerability in Freebsd, classified under Use of Uninitialized Resource. CVSS score: 5.3/10. Published 2020-04-28.

How severe is CVE-2020-7451?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Freebsd

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.

EPSS: 0.011 (63.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Freebsd — versions 11.3, 12.1
N/a Freebsd — versions 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

Weakness classification (CWE)

CWE-908 — Use of Uninitialized Resource

References

secteam@freebsd.org (x_refsource_CONFIRM, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2020-7451?: CVE-2020-7451 is a medium-severity vulnerability in Freebsd, classified under Use of Uninitialized Resource. CVSS score: 5.3/10. Published 2020-04-28.
How severe is CVE-2020-7451?: Medium severity. CVSS v3 base score is 5.3 out of 10.