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Debian Security Advisory 4389-1

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

Debian Security Advisory 4389-1

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- -------------------------------------------------------------------------
Debian Security Advisory DSA-4389-1 security@debian.org
https://www.debian.org/security/ Sebastien Delafond
February 11, 2019 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : libu2f-host
CVE ID : CVE-2018-20340
Debian Bug : 921725

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.

For the stable distribution (stretch), this problem has been fixed in
version 1.1.2-2+deb9u1.

We recommend that you upgrade your libu2f-host packages.

For the detailed security status of libu2f-host please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/libu2f-host

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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