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CVE-2018-20340

Status Candidate

Overview

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.

Related Files

Debian Security Advisory 4389-1
Posted Feb 12, 2019
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4389-1 - Christian Reitter discovered that libu2f-host, a library implementing the host-side of the U2F protocol, failed to properly check for a buffer overflow. This would allow an attacker with a custom made malicious USB device masquerading as a security key, and physical access to a computer where PAM U2F or an application with libu2f-host integrated, to potentially execute arbitrary code on that computer.

tags | advisory, overflow, arbitrary, protocol
systems | linux, debian
advisories | CVE-2018-20340
MD5 | 4ee8ca6e4bb55c9264a3428d659dd417
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