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.

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.012 (66.1th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2020-7451: held from 0.011 to 0.012.

EPSS over last 30 days · oldest: 0.011 · newest: 0.012 · change: +0.000

Affected products

  • FreeBSD — versions 11.3, 12.1
  • 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)

References

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.