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CVE-2020-7451

Good to know:

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Date: April 28, 2020

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.

Language: C

Severity Score

Related Resources (3)

https://security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc
https://nvd.nist.gov/vuln/detail/CVE-2020-7451
https://www.mend.io/vulnerability-database/CVE-2020-7451

Severity Score

Weakness Type (CWE)

Information Leak / Disclosure

CWE-200

Use of Uninitialized Resource

CWE-908

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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