CVE-2020-7464

moderate-risk
Published 2021-03-26

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.

Do I need to act?

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0.28% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (20)

Affected Vendors

Freebsd

References (2)

Vendor Advisory https://security.FreeBSD.org/advisories/FreeBSD-SA-20:27.ure.asc
Vendor Advisory https://security.FreeBSD.org/advisories/FreeBSD-SA-20:27.ure.asc
44
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 1/34 · Minimal
Exposure 22/34 · High