CVE-2018-20340: Yubico libu2f-host 1.1.6 contains unchecked buffers in devs.c, which could enable a malicious token to exploit a buffer overflow. An attacker could use this to…

PriorityP428medium6.8CVSS 3.0

AVPACLPRNUINSUCHIHAH

EPSS

0.50%

40.0th percentile

Yubico libu2f-host 1.1.6 contains unchecked buffers in devs.c, which could enable a malicious token to exploit a buffer overflow. An attacker could use this to attempt to execute malicious code using a crafted USB device masquerading as a security token on a computer where the affected library is currently in use. It is not possible to perform this attack with a genuine YubiKey.

Affected

7 ranges

Vendor	Product	Version range	Fixed in
debian	debian_linux	—	—
debian	libu2f-host	< libu2f-host 1.1.7-1 (bookworm)	libu2f-host 1.1.7-1 (bookworm)
yubico	libu2f-host	—	—
yubico	libu2f-host	>= 0 < 1.1.7-1	1.1.7-1
yubico	libu2f-host	>= 0 < 1.1.7-1	1.1.7-1
yubico	libu2f-host	>= 0 < 1.1.7-1	1.1.7-1
yubico	libu2f-host	>= 0 < 1.1.7-1	1.1.7-1

CVSS provenance

nvdv3.06.8MEDIUMCVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvdv2.04.6MEDIUMAV:L/AC:L/Au:N/C:P/I:P/A:P

osv6.8MEDIUM

vendor_debian6.8MEDIUM

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