CVE-2020-7451 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Reference

https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

5.3