CVE-2018-20340

Name	CVE-2018-20340
Description	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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-4389-1
Debian Bugs	921726

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libu2f-host (PTS)	buster	1.1.9-1	fixed
	sid, trixie, bookworm, bullseye	1.1.10-3	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libu2f-host	source	stretch	1.1.2-2+deb9u1		DSA-4389-1
libu2f-host	source	(unstable)	1.1.7-1			921726

Notes

https://www.yubico.com/support/security-advisories/ysa-2019-01/
https://github.com/Yubico/libu2f-host/commit/f526546bb29f2ef704ae9850f0f4b41fea7b62a4
https://github.com/Yubico/libu2f-host/commit/e77a109f8cf60d9eafdf005ab5c851d5f576c01e