CVE-2020-7464 Information

Description

In FreeBSD 12.2-STABLE before r365730 11.4-STABLE before r365738 12.1-RELEASE before p10 11.4-RELEASE before p4 and 11.3-RELEASE before p14 a programming error in the ure(4) device driver caused some Realtek USB Ethernet interfaces to incorrectly report packets with more than 2048 bytes in a single USB transfer as having a length of only 2048 bytes. An adversary can exploit this to cause the driver to misinterpret part of the payload of a large packet as a separate packet and thereby inject packets across security boundaries such as VLANs.

CVSS Vector

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

Reference

https://security.FreeBSD.org/advisories/FreeBSD-SA-20:27.ure.asc

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

5.3