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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

Gentoo Linux Security Advisory 202004-15
Posted May 1, 2020
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202004-15 - Multiple vulnerabilities have been found in libu2f-host, the worst of which could result in the execution of code. Versions less than 1.1.10 are affected.

tags | advisory, vulnerability
systems | linux, gentoo
advisories | CVE-2018-20340, CVE-2019-9578
SHA-256 | 4b1c335972214bc2cc77f8f831c29db5e60612680191ae81bf160802d12d1c04
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
SHA-256 | e958c3e439087b235f321d5e3fda54438a4a239199a038e5a4b8cfcb3ef24ec8
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